Tahoe Research, Scholarship & Outreach at the University of Nevada, Reno

Dissertations and Theses about the Tahoe Basin
by Students at the University of Nevada, Reno

Water


Author:
Allander, Kip K.
Year: (2004)
Title: An estimate of the contributions of streamflow and nutrients to Trout Creek, South Lake Tahoe, California.
Institution: University of Nevada Reno
No. Pages: 120
Thesis Type: MS
Link: Download (UNR Only)
Keywords: HYDROLOGY (0388)
Abstract: Relative contributions of streamflow and nutrients to Trout Creek were estimated by separating streamflow into elementary components of direct precipitation, ground water, and direct runoff and estimating nutrient concentrations for each component. The relative contributions of ground water, direct runoff, and nutrient loads originating upstream and downstream of a developed area were estimated. Direct precipitation onto the surface of Trout Creek and its tributaries was nearly insignificant to overall streamflow and total phosphorous load, but was more important for total nitrogen load. The majority of streamflow originated upstream of development, mostly as ground water. The majority of nutrients originated upstream of development with greater contributions from ground water than from direct runoff. A disproportionate amount of nutrients, as compared to flow, originated downstream of development. Note: dissertation citations and abstracts contained here are published with permission of ProQuest Information and Learning. Further reproduction is prohibited without permission. Copies of dissertations may be obtained by addressing your request to UMI® Dissertation Services, 300 North Zeeb Road, Ann Arbor, MI 48106-1346 USA. Telephone (734) 761-7400; Web-page: wwwlib.umi.com/dissertations.
Advisor: Thomas, J.
Reference: MAI 42/06, p. 2137, Dec 2004
 

Author:
Ayers, Michael Benson
Year: (1997)
Title: Aerial multispectral videography for vegetation mapping and assessment of beaver distribution within selected riparian areas of the Lake Tahoe Basin (Nevada, California).
Institution: University of Nevada Reno
No. Pages: 71
Thesis Type: MS
Link: Download (UNR Only)
Keywords: AGRICULTURE, FORESTRY AND WILDLIFE (0478); PHYSICAL GEOGRAPHY (0368)
Abstract: I used multispectral videography to classify 10 streams in the Tahoe Basin, California and Nevada. I mosaicked images before georeferencing and positional accuracy did not decrease relative to a pilot study in the basin. Mosaics were manually separated into 'riparian', 'upland', and 'channel' regions and classified independently, reducing errors caused by spectral overlap among coniferous, deciduous, thick, and thin herbaceous vegetation and between water and shadow. When defining the training data, more than one spectral class defined some information classes. The videography was classified into 11 classes using a step-wise linear discriminant algorithm resulting in average accuracies of 68% and 73% when five cover classes were generalized into two classes. I compared buffer zones of 50, 100, and 200 meters centered on active dams to ones centered on random points. Area estimates of coniferous, deciduous, thick, and thin vegetation were significantly different in at least one of the three buffers. Note: dissertation citations and abstracts contained here are published with permission of ProQuest Information and Learning. Further reproduction is prohibited without permission. Copies of dissertations may be obtained by addressing your request to UMI® Dissertation Services, 300 North Zeeb Road, Ann Arbor, MI 48106-1346 USA. Telephone (734) 761-7400; Web-page: wwwlib.umi.com/dissertations.
Advisor: Tueller, Paul T.
Reference: 0-591-68326-1; MAI 36/03, p. 744, Jun 1998
 

Author:
Boyle, Douglas Patrick
Year: (1996)
Title: Partial area rainfall-runoff modeling: A case study in a small, undeveloped catchment near Lake Tahoe (Nevada).
Institution: University of Nevada Reno
No. Pages: 113
Thesis Type: MS
Link: Download (UNR Only)
Keywords: HYDROLOGY (0388); ENGINEERING, CIVIL (0543)
Abstract: This study involved the application and evaluation of the Soil Conservation Service (SCS), variable source area (VSA), and constant source area (CSA) rainfall-runoff models on a small, undeveloped catchment near Lake Tahoe. The study was conducted to test the utility and predictive capability of the selected rainfall-runoff models for the case of small, undeveloped, forested catchments within the Lake Tahoe basin. The performance of each model was evaluated with a variety of calibration and validation scenarios over seven observed rainfall- runoff events. Results of the study indicated that all three models did a poor job of simulating peak flows and flow volumes. The CSA model, however, performed better than the SCS and VSA models in all tests. Calibration storm event selection and base flow separation techniques had a significant impact on the performance of all models. Note: dissertation citations and abstracts contained here are published with permission of ProQuest Information and Learning. Further reproduction is prohibited without permission. Copies of dissertations may be obtained by addressing your request to UMI® Dissertation Services, 300 North Zeeb Road, Ann Arbor, MI 48106-1346 USA. Telephone (734) 761-7400; Web-page: wwwlib.umi.com/dissertations.
Advisor: Warwick, John J.
Reference: 0-591-24587-6; MAI 35/03, p. 777, Jun 1997
 

Author:
Brown, David L.
Year: (1987)
Title: Nitrate Cycling and Hydrologic Transport Mechanisms in a Sierra Nevada Headwaters Watershed (California; Groundwater Pollution).
Institution: University of Nevada Reno
No. Pages: 87
Thesis Type: MS
Link: UNR Life and Health Sciences Library Call Number: Thesis 2208 
Keywords: HYDROLOGY (0388)
Abstract: The primary non-point source pollutant impacting Lake Tahoe is nitrate-nitrogen. This paper presents the results of four years of research that address nitrate transport and cycling characteristics at the watershed level. Water quality was monitored in an undeveloped 79.6 ha headwaters watershed to delineate nitrate concentrations in precipitation, stream discharge, soil moisture and groundwater. The flow and storage in these systems was measured using an extensive instrumentation network. Nitrate cycling mechanisms including denitrification and uptake by periphyton, conifers and macrophytic vegetation were studied in the field, and estimates were made of nitrogen-fixation and nitrification. The results show that the study watershed removes virtually 100% of the nitrate derived from all sources. A simplified conceptual model is presented to describe the temporal interactions between removal and hydrologic transport mechanisms. Note: dissertation citations and abstracts contained here are published with permission of ProQuest Information and Learning. Further reproduction is prohibited without permission. Copies of dissertations may be obtained by addressing your request to UMI® Dissertation Services, 300 North Zeeb Road, Ann Arbor, MI 48106-1346 USA. Telephone (734) 761-7400; Web-page: wwwlib.umi.com/dissertations.
Advisor:
Reference: MAI 26/01, p. 94, Spring 1988
 

Author:
Burcar, Scott Anthony
Year: (1992)
Title: Seasonal preferential flow and nutrient transport in selected Sierra Nevada soils.
Institution: University of Nevada Reno
No. Pages: 66
Thesis Type: MS
Link: UNR Life and Health Sciences Library Call Number:Thesis 3031   
Keywords: HYDROLOGY (0388)
Abstract: Little work has focused on groundwater, its quality, and potential affect on Lake Tahoe water quality. This study investigated seasonal infiltration, preferential water flow, and NH$/sb4/sp+$ and NO$/sb3/sp-$ transport in 2 Sierra Nevada soil types under forest and meadow conditions using rainfall simulation. Soil water repellency was clearly shown to induce preferential infiltration. The finer textured volcanic soil demonstrated continuous preferential flow with depth, whereas preferential flow rapidly dissipated in the coarser textured granitic soil. Wetting patterns showed greater instability and preferential flow in the forested areas in the late summer/early fall. Applied NH$/sb4/sp+$ was effectively adsorbed by the soil matrix suggesting that unstable wetting occurred by preferential flow in wettable portions of the soil matrix and not by macropore flow. Nitrate moved through the granitic soil at applied concentrations but was attenuated with depth in the volcanic soil as the latter demonstrated NO$/sb3/sp-$ adsorption. Note: dissertation citations and abstracts contained here are published with permission of ProQuest Information and Learning. Further reproduction is prohibited without permission. Copies of dissertations may be obtained by addressing your request to UMI® Dissertation Services, 300 North Zeeb Road, Ann Arbor, MI 48106-1346 USA. Telephone (734) 761-7400; Web-page: wwwlib.umi.com/dissertations.
Advisor: Miller, W. W.
Reference: MAI 31/02, p. 737, Summer 1993
 

Author:
Butt, Anya Zarina
Year: (1999)
Title: Stream channel morphology in the Lake Tahoe Basin within a hierarchical framework: A geomorphic perspective.
Institution: University of Nevada Reno
No. Pages: 355
Thesis Type: PhD
Link: Download (UNR Only)
Keywords: HYDROLOGY (0388); PHYSICAL GEOGRAPHY (0368); GEOLOGY (0372)
Abstract: Streams and their associated environments represent a unique focus of many research interests due to the fluvial processes that shape and influence their morphology as well as the ecological interactions of the riparian environment. The need to understand stream environments has generated numerous classification systems at various scales. In an attempt to examine stream morphology in a hierarchical context, I linked three scales of geomorphological information and examined their interaction. With assistance from the USFS, I classified 33 streams in the Lake Tahoe Basin according to the Rosgen (1994) classification and categorized these reaches according to the Montgomery/Buffington (1993) system. There is general agreement between the two systems, but categories in the Montgomery/Buffington system are often unclear, while the quantitative description in the Rosgen system provides a clear mental image and tool for classification. I propose the channel incisement depth ratio, defined as the ratio of the height of the first terrace above the channel bed to the maximum bankful depth, and the channel incisement width ratio as the ratio of the width of the floodplain contained between the terrace banks to the bankful channel width, as alternative and additional channel morphological parameters to more fully describe the channel environment. I found significant differences in bankful channel width/depth and entrenchment ratios between reaches in terrain with differing geomorphic heritage (fluvial versus glacial fill). The influence of geology on stream morphology is muted due to the formation of alluvial valleys by the stream. In steeper reaches, an interaction between geology and geomorphic heritage exists, reflecting the increased weathering susceptibility of volcanic rocks and the greater sorting imparted by fluvial processes. In-stream habitat units also had significant differences in their occurrence and physical structure in the varying geologic and geomorphic terrains. The influence of geology and geomorphology at the stream-reach level and the habitat-unit level indicates that a hierarchical structure is inherent in the fluvial system. Understanding these interactions allows us to more effectively manage stream ecosystems by addressing restoration concerns by encompassing the entire watershed. Note: dissertation citations and abstracts contained here are published with permission of ProQuest Information and Learning. Further reproduction is prohibited without permission. Copies of dissertations may be obtained by addressing your request to UMI® Dissertation Services, 300 North Zeeb Road, Ann Arbor, MI 48106-1346 USA. Telephone (734) 761-7400; Web-page: wwwlib.umi.com/dissertations.
Advisor: Swansen, Sherman
Reference: 0-599-64976-3; DAI-B 61/02, p. 749, Aug 2000
 

Author:
Cave, Deborah Leigh
Year: (1987)
Title: Geochemical Reactions between Primary-Treated Sewage and Volcanic Phase Assemblages near Tahoe City, California.
Institution: University of Nevada Reno
No. Pages: 171
Thesis Type: MS
Link: UNR DeLaMare Library and DRI Library Call Number: Thesis 2235 
Keywords: HYDROLOGY (0388); GEOCHEMISTRY (0996)
Abstract: Volcanic terrain near Tahoe City, California, was utilized from 1970 to 1978 as a land disposal medium for primary-treated sewage. Prior to effluent application, the primary geochemical process occurring in the latite flow system was weathering of aluminosilicates; feldspars were the dominant reactants, contributing 82 percent of total ions (Ca, Na, K) to solution. During effluent application, dissolution of plagioclase feldspars increased 260 percent; Ca concentrations in solution increased proportionately, but Na and K levels decreased. Cation exchange and adsorption were not viable mechanisms for continual removal of high sodic concentrations from solution; therefore, formation of disordered clays appears to have been the principal sink for Na, K and silica in the flow system. Cation concentrations in solution and resultant clay precipitation were controlled by: (1) aluminosilicate dissolution and resultant cation ratios in solution; (2) anion concentrations; and (3) aluminum concentrations in solution. Note: dissertation citations and abstracts contained here are published with permission of ProQuest Information and Learning. Further reproduction is prohibited without permission. Copies of dissertations may be obtained by addressing your request to UMI® Dissertation Services, 300 North Zeeb Road, Ann Arbor, MI 48106-1346 USA. Telephone (734) 761-7400; Web-page: wwwlib.umi.com/dissertations.
Advisor:
Reference: MAI 26/02, p. 228, Summer 1988
 

Author:
Cheng, Ericson W.
Year: (1997)
Title: An automatic instrumentation and telemetry system for the Fallen Leaf Lake Watershed (California).
Institution: University of Nevada Reno
No. Pages: 73
Thesis Type: MS
Link: Download (UNR Only)
Keywords: ENGINEERING, ELECTRONICS AND ELECTRICAL (0544); HYDROLOGY (0388); PHYSICAL GEOGRAPHY (0368)
Abstract: This thesis describes an automatic instrumentation and telemetry system for monitoring the snowpack, lake level, and streamflow on the Fallen Leaf Lake Watershed. This Sierra watershed, located south of Lake Tahoe, provides an opportunity to study a closed hydrological system. Much of the watershed lies within the Desolation Wilderness area, where the deployment of data collecting equipment is restricted to protect the primeval quality of the region. It is proposed that a remote data collection station can be adapted to blend into a wilderness environment for the purpose of gathering critical snowpack data without spoiling the natural character of the land. Establishing an automated and telemetered data gathering system provides valuable real- time data for the analysis and modelling of the watershed. Understanding the hydrological behavior of the watershed is essential to managing it as a water resource and for minimizing flooding problems. Note: dissertation citations and abstracts contained here are published with permission of ProQuest Information and Learning. Further reproduction is prohibited without permission. Copies of dissertations may be obtained by addressing your request to UMI® Dissertation Services, 300 North Zeeb Road, Ann Arbor, MI 48106-1346 USA. Telephone (734) 761-7400; Web-page: wwwlib.umi.com/dissertations.
Advisor: Kleppe, John A.
Reference: 0-591-57913-8; MAI 36/01, p. 230, Feb 1998
 

Author:
Dahlberg, Bary Victor
Year: (2001)
Title: The Truckee River Act: Salvation of reclamation or servant of power? (Nevada, California).
Institution: University of Nevada Reno
No. Pages: 99
Thesis Type: MA
Link: Download (UNR Only)
Keywords: HISTORY, UNITED STATES (0337); POLITICAL SCIENCE, GENERAL (0615)
Abstract: Any controversy concerning water in the western United States is awash in decades of political maneuvering and legal battles; therefore considerable background is needed to introduce the Truckee River Agreement. This background is arranged chronologically and starts with the geography of the Truckee River Basin, some early plans for the Truckee River waters and a backdrop of United States water law. A serious conflict for Truckee River water started soon after The Reclamation Service initiated the Truckee-Carson Irrigation Project in 1902. The goal of the project was to irrigate hundreds of acres on the lower Carson River using a diversion of Truckee River water. The Reclamation Service quickly became desperate for water for the Project. The Service fought to gain control of Lake Tahoe waters, which resulted in the General Electric Decree. They initiated a Federal lawsuit to establish water rights in the Truckee Meadows that became known as the Orr Ditch Case. Three major interests emerged in the contest for Truckee River water: the Reclamation Service, The Truckee Meadows irrigators and the Sierra Pacific Company, a power and water utility. The depression and drought of the 1930's along with Federal assistance forced the final negotiations for upstream water storage. Secretary of the Interior Harold Ickies approved the Truckee River Agreement on June 13, 1935 and President Franklin Roosevelt signed the appropriation for the Truckee River Storage Project four months later. Note: dissertation citations and abstracts contained here are published with permission of ProQuest Information and Learning. Further reproduction is prohibited without permission. Copies of dissertations may be obtained by addressing your request to UMI® Dissertation Services, 300 North Zeeb Road, Ann Arbor, MI 48106-1346 USA. Telephone (734) 761-7400; Web-page: wwwlib.umi.com/dissertations.
Advisor: Rowley, William
Reference: 0-493-36570-2; MAI 40/02, p. 346, Apr 2002
 

Author:
Drivas, Evan Peter
Year: (1986)
Title: Sampling Schedules for Tahoe Basin Streams During Snowmelt (Nevada).
Institution: University of Nevada Reno
No. Pages: 43
Thesis Type: MS
Link:
Keywords: HYDROLOGY (0388)
Abstract: Abstract not available. Note: dissertation citations and abstracts contained here are published with permission of ProQuest Information and Learning. Further reproduction is prohibited without permission. Copies of dissertations may be obtained by addressing your request to UMI® Dissertation Services, 300 North Zeeb Road, Ann Arbor, MI 48106-1346 USA. Telephone (734) 761-7400; Web-page: wwwlib.umi.com/dissertations.
Advisor:
Reference: MAI 25/02, p. 189, Summer 1987
 

Author:
Fenske, Jon Paul
Year: (1990)
Title: Erosion control and water quality in the Tahoe Basin California-Nevada.
Institution: University of Nevada Reno
No. Pages: 160
Thesis Type: MS
Link:
Keywords: GEOLOGY (0372); HYDROLOGY (0388); ENVIRONMENTAL SCIENCES (0768)
Abstract: The Lake Tahoe Basin is extremely sensitive to human activities. Steep slopes, unstable soils, a harsh climate, and a short growing season to reestablish vegetation increase erosion potential. With the advent of development in the past 30 years, much of which was on environmentally sensitive lands, eutrophication increased dramatically as did the need for environmental safeguards. The magnitude of sediment discharge and its accompanying nutrients transported to the lake is dependent on a readily available source of sediment and a water flow of high enough energy to induce movement. Retention structures, which treat runoff prior to discharge into the lake, are one way man has attempted to control the effects of erosion on water quality. The Tahoe City Urban Improvement Projects propose to divert urban runoff away from the lake to a retention structure for treatment. To ensure design integrity, a hydrogeologic site investigation was performed. Because of high groundwater levels encountered near the center of the site and the limited construction area, substantial berming would be required for the implementation of initial design proposals. Note: dissertation citations and abstracts contained here are published with permission of ProQuest Information and Learning. Further reproduction is prohibited without permission. Copies of dissertations may be obtained by addressing your request to UMI® Dissertation Services, 300 North Zeeb Road, Ann Arbor, MI 48106-1346 USA. Telephone (734) 761-7400; Web-page: wwwlib.umi.com/dissertations.
Advisor:
Reference: MAI 29/02, p. 251, Summer 1991
 

Author:
Fiore, Mary F.
Year: (1999)
Title: Quantifying the dissolved phase of MTBE and BTEX exhausted from marine engines: Lake Tahoe motorized watercraft study (California, Nevada).
Institution: University of Nevada Reno
No. Pages: 60
Thesis Type: MS
Link: Download (UNR Only)
Keywords: ENVIRONMENTAL SCIENCES (0768); RECREATION (0814)
Abstract: Marine engine exhaust is identified as a source of gasoline hydrocarbon pollution in fresh water lakes. The objective of this study was to determine if the occurrence of gasoline in Lake Tahoe was associated with motorized watercraft and to identify which engine types emitted the largest fraction of unburned gasoline into the water. This research demonstrated that the operation of all marine engines, regardless of operating cycle (two- or four-stroke) and induction system (carbureted or fuel injection), released measurable amounts of MTBE and BTEX. Engines powered by two-stroke carbureted systems, however, created considerably more hydrocarbon pollution then four-stroke marine engines. In a localized area, the concentrations of gasoline constituents released by a two-stroke engine were over an order of magnitude greater than concentrations measured for four-stroke and two- stroke direct injection technologies. Open water tests suggested two-stroke carbureted engines are the biggest polluters, discharging at least seven times more gasoline hydrocarbons then four-stroke marine engines. Note: dissertation citations and abstracts contained here are published with permission of ProQuest Information and Learning. Further reproduction is prohibited without permission. Copies of dissertations may be obtained by addressing your request to UMI® Dissertation Services, 300 North Zeeb Road, Ann Arbor, MI 48106-1346 USA. Telephone (734) 761-7400; Web-page: wwwlib.umi.com/dissertations.
Advisor: Miller, Glenn C.
Reference: 0-599-67835-6; MAI 38/04, p. 964, Aug 2000
 

Author:
Fox, Forrest Lee
Year: (1982)
Title: Chemical Variations of the Truckee River from Lake Tahoe to Truckee, California During Low Flow.
Institution: University of Nevada Reno
No. Pages: 127
Thesis Type: MS
Link:
Keywords: HYDROLOGY (0388)
Abstract: Abstract not available. Note: dissertation citations and abstracts contained here are published with permission of ProQuest Information and Learning. Further reproduction is prohibited without permission. Copies of dissertations may be obtained by addressing your request to UMI® Dissertation Services, 300 North Zeeb Road, Ann Arbor, MI 48106-1346 USA. Telephone (734) 761-7400; Web-page: wwwlib.umi.com/dissertations.
Advisor:
Reference: MAI 21/02, p. 173, Summer 1983
 

Author:
Fritchel, Patrick Earl
Year: (2003)
Title: Evaluation of erosion control strategies used for channel protection in the Clear Creek watershed, eastern Sierra Nevada.
Institution: University of Nevada Reno
No. Pages: 140
Thesis Type: MS
Link: Download (UNR Only)
Keywords: ENGINEERING, CIVIL (0543); ENGINEERING, ENVIRONMENTAL (0775)
Abstract: Severe erosion is occurring at several locations in the Clear Creek watershed along U.S. Highway 50 between Carson City and Lake Tahoe. Erosion has caused problems related to slope stability along roadways and increased maintenance requirements, especially those associated with drainage structures. The physical characteristics of the upper Clear Creek watershed include steep slopes, thin soil sections, and highly weathered bedrock, which allow erosion to proceed almost unchecked. In numerous cases, the erosion has manifested itself in the form of deep gullies and rilled slopes. A combination of laboratory tests and field studies were conducted to assess the performance of several rolled erosion control products (RECPs). These RECPs were found to be effective in reducing erosion over granular bare soil by a magnitude of three. In general, RECPs constructed with components containing a rigid netting appeared to perform slightly better than other more flexible linings. Note: dissertation citations and abstracts contained here are published with permission of ProQuest Information and Learning. Further reproduction is prohibited without permission. Copies of dissertations may be obtained by addressing your request to UMI® Dissertation Services, 300 North Zeeb Road, Ann Arbor, MI 48106-1346 USA. Telephone (734) 761-7400; Web-page: wwwlib.umi.com/dissertations.
Advisor: Dennett, Keith E.
Reference: MAI 42/02, p. 637, Apr 2004
 

Author:
Gangopadhyay, Arun Kumar
Year: (1989)
Title: Economics of water transfers in the Tahoe-Truckee basin of Nevada.
Institution: University of Nevada Reno
No. Pages: 117
Thesis Type: MS
Link:
Keywords: ECONOMICS, AGRICULTURAL (0503)
Abstract: The problem of improving water allocation in the Tahoe- Truckee basin of Nevada has assumed great significance, particularly during recent drought in the State. One of the main issues is whether there are potential gains from both long-term and short-term water transfers from agricultural uses to non-agricultural uses. The main objective of this study is to examine this question and formulate, by using value of marginal productivity analysis and regression analysis, mechanisms for short- term allocation of water between agricultural and municipal uses for the Tahoe-Truckee basin of Nevada during drought. More precisely, this study attempts to outline procedures and implications for water transfers from the Sierra Valley, California to the Truckee Meadows in Nevada, and for water transfers from agricultural uses to municipal uses within the Truckee Meadows area under conditions of drought. Note: dissertation citations and abstracts contained here are published with permission of ProQuest Information and Learning. Further reproduction is prohibited without permission. Copies of dissertations may be obtained by addressing your request to UMI® Dissertation Services, 300 North Zeeb Road, Ann Arbor, MI 48106-1346 USA. Telephone (734) 761-7400; Web-page: wwwlib.umi.com/dissertations.
Advisor:
Reference: MAI 28/01, p. 48, Spring 1990
 

Author:
Gore, Allison Lynn
Year: (1999)
Title: The federal role in regional scale watershed management in the western United States. Case study: Tahoe Basin watershed initiative (Nevada, California).
Institution: University of Nevada Reno
No. Pages: 54
Thesis Type: MA
Link: Download (UNR Only)
Keywords: POLITICAL SCIENCE, GENERAL (0615); ENVIRONMENTAL SCIENCES (0768); URBAN AND REGIONAL PLANNING (0999)
Abstract: The fundamentals of the American political system, with multiple layers and branches of government, are a reality of the institutional fragmentation that is inevitable in a nation of decentralized government. Regional water policies have evolved with shifts in federal and state institutions' struggle for the balance of power. Historically, these changes have been incremental; however, in recent decades technological and economic advances, particularly in the West, along with environmental concerns, have fostered rapid changes in water-related institutions. As a new century approaches, the control of water resources at regionally defined scales has become fashionable, especially at the watershed level. New strategies have been championed to deal with the many concerns deriving from federal, state and local efforts to manage regional watersheds in the western U.S. The federal government plays a significant and essential role in the effective functioning of most watershed initiatives. A major focus of this research has been to examine the way that federal agencies support, impair, and participate in watershed policy and management. The Tahoe Basin will serve as a case study in order to examine federal influence in the modern watershed initiative. Reasons for considering the Tahoe Basin include (1) water resource management occurs at the federal, state, regional, and local level, (2) the Basin is a western watershed struggling with both conservation and development issues, and (3) there is significant federal support for and intervention in watershed management and conservation policy for the Basin. Note: dissertation citations and abstracts contained here are published with permission of ProQuest Information and Learning. Further reproduction is prohibited without permission. Copies of dissertations may be obtained by addressing your request to UMI® Dissertation Services, 300 North Zeeb Road, Ann Arbor, MI 48106-1346 USA. Telephone (734) 761-7400; Web-page: wwwlib.umi.com/dissertations.
Advisor: Magennis, Leah
Reference: 0-599-43816-9; MAI 38/01, p. 75, Feb 2000
 

Author:
Gorman, Kimberly P.
Year: (2003)
Title: The isolation of dissolved organic phosphorus in aqueous solutions of lake water, soil leachate, and plant extracts.
Institution: University of Nevada Reno
No. Pages: 77
Thesis Type: MS
Link: Download (UNR Only)
Keywords: ENVIRONMENTAL SCIENCES (0768); CHEMISTRY, ORGANIC (0490); AGRICULTURE, SOIL SCIENCE (0481)
Abstract: This research was designed to isolate the DOP portion of the dissolved P fraction in order to assess its bioavailability. Two different chemical treatments were performed: anion exchange utilizing a hydroxyl form resin, and chemical precipitation by addition of CaCl2, and Al2(SO 4)3. Treatments were developed to promote SRP removal while leaving DOP behind in solution. Several of the experiments performed in this study show promise with isolating DOP, however, in many cases both SRP and DOP portions of the dissolved fraction were removed from solution. Of all the experiments performed, the calcium chloride treatment seemed to be the most effective when used upon the Everglades water samples. To date, the most successful means for isolating DOP is by degassing EG water samples at ambient pH, followed by pH 10.0 adjustment and 0.01 M CaCl2 addition. DOP isolation with the Tahoe soil leachate samples seems more difficult to achieve. Note: dissertation citations and abstracts contained here are published with permission of ProQuest Information and Learning. Further reproduction is prohibited without permission. Copies of dissertations may be obtained by addressing your request to UMI® Dissertation Services, 300 North Zeeb Road, Ann Arbor, MI 48106-1346 USA. Telephone (734) 761-7400; Web-page: wwwlib.umi.com/dissertations.
Advisor: Miller, W. W.
Reference: MAI 42/05, p. 1666, Oct 2004
 

Author:
Greenlee, Daniel Lloyd
Year: (1985)
Title: Denitrification Rates of a Mountain Meadow near Lake Tahoe (Acetylene, Inhibition).
Institution: University of Nevada Reno
No. Pages: 52
Thesis Type: MS
Link:
Keywords: HYDROLOGY (0388)
Abstract: Abstract not available. Note: dissertation citations and abstracts contained here are published with permission of ProQuest Information and Learning. Further reproduction is prohibited without permission. Copies of dissertations may be obtained by addressing your request to UMI® Dissertation Services, 300 North Zeeb Road, Ann Arbor, MI 48106-1346 USA. Telephone (734) 761-7400; Web-page: wwwlib.umi.com/dissertations.
Advisor:
Reference: MAI 24/03, p. 238, Fall 1986
 

Author:
Guerrant, Douglas Gordon
Year: (1989)
Title: Evaluation of infiltration, runoff and sediment transport characteristics in Sierra Nevada watersheds through rainfall simulation.
Institution: University of Nevada Reno
No. Pages: 108
Thesis Type: MS
Link:
Keywords: GEOTECHNOLOGY (0428); ENGINEERING, AGRICULTURAL (0539)
Abstract: Quantitative erosion data for Tahoe Basin soils are lacking. Rainfall simulation was used to measured infiltration, runoff and erosion of Cagwin soil under three slope (0-15, 15-30, and $>$30%) and four plot (natural with duff, natural without duff, disturbed without duff, and disturbed with duff) condition. Simulated storms were $>$100 yr-1 hr event. Relationships were analyzed via a modified Philip's model and multiple non-linear regression (P = 0.01). All plots were significantly different. Final infiltration (i$/sb[/rm f]$) ranged from 4.6-6.1 cm hr$/sp[-1]$ and runoff from 36-59%. Natural conditions with duff demonstrated highest and without duff lowest i$/sb[/rm f]$. Runoff was reversed. Sediment discharge increased with slope, decreased with time, and was greatest for disturbed with duff (1,391-35,416 Kg Ha$/sp[-1]$) and least for natural with duff conditions (trace). Modeled cumulative sediment vs. runoff demonstrated general erosivity for each slope/plot condition. Note: dissertation citations and abstracts contained here are published with permission of ProQuest Information and Learning. Further reproduction is prohibited without permission. Copies of dissertations may be obtained by addressing your request to UMI® Dissertation Services, 300 North Zeeb Road, Ann Arbor, MI 48106-1346 USA. Telephone (734) 761-7400; Web-page: wwwlib.umi.com/dissertations.
Advisor:
Reference: MAI 28/01, p. 158, Spring 1990
 

Author:
Gupta, Kimberly Tina
Year: (2002)
Title: An evaluation of potential contaminating activities to the Truckee River and Lake Tahoe in northern Nevada.
Institution: University of Nevada Reno
No. Pages: 448
Thesis Type: MS
Link: Download (UNR Only)
Keywords: ENGINEERING, ENVIRONMENTAL (0775); ENGINEERING, CIVIL (0543); ENVIRONMENTAL SCIENCES (0768)
Abstract: Source water protection is an essential component for an effective protection plan for drinking water supplies. Nevada is the most arid state in the nation, and with competing consumers increasingly sharing limited water resources, source water protection is essential to ensure a future drinking water supply. According to the 1996 amendments to the Safe Drinking Water Act, every public water system (PWS) serving more than 20,000 residents must complete a source water assessment. These assessments are meant to provide opportunities and tools to protect drinking water at its sources through the identification of contaminants and activities that potentially threaten public drinking water systems. Study results indicated that a contaminant spill from either the railroad or highway poses the most significant threat to both the Truckee River and Lake Tahoe drinking water sources. Other potential sources of contamination (PCAs) observed include stormdrains, sewage transfer stations and businesses. Note: dissertation citations and abstracts contained here are published with permission of ProQuest Information and Learning. Further reproduction is prohibited without permission. Copies of dissertations may be obtained by addressing your request to UMI® Dissertation Services, 300 North Zeeb Road, Ann Arbor, MI 48106-1346 USA. Telephone (734) 761-7400; Web-page: wwwlib.umi.com/dissertations.
Advisor: Adams, V. Dean
Reference: MAI 42/01, p. 285, Feb 2004
 

Author:
Harlow, David Eric
Year: (1998)
Title: Nutrients in Soil Core Leachate Collected from Six Plant Communities in Incline Creek Watershed, Nevada.
Institution: University of Nevada Reno
No. Pages: 65
Thesis Type: MS
Link:
Keywords:
Abstract: The decreasing clarity of ultra-oligotrophic Lake Tahoe's waters is partly attributed to increased algal productivity resulting from enhanced nutrient loading. Soil cores were leached under saturated and unsaturated conditions to examine nutrient discharge from six common plant communities on the Incline Creek, NV, watershed. Because nitrogen fixing shrubs grow throughout the watershed, leachable nutrients from soils collected near nitrogen fixing shrubs, non-nitrogen fixing species, and non-shrub plant communities were compared. Dissolved organic/colloidal N was the dominant form of nitrogen, averaging 7.85 times the leached amount of nitrate. The magnitude and the mobility of the dissolved organic/colloidal nitrogen represents a tremendous source of potentially bioavailable nitrogen. Phosphorus was not significantly different between treatments and had a dissolved organic/colloidal to ortho-P ratio of 0.348. Limited data from unsaturated leaching experiments suggest there are few differences in nutrient transport between saturated and unsaturated leaching.
Advisor:
Reference: 1389845
 

Author:
Keaveney, Gregory J.
Year: (1999)
Title: Production of trihalomethanes and haloacetic acids from chlorinated, aqueous plant extracts.
Institution: University of Nevada Reno
No. Pages: 182
Thesis Type: MS
Link: Download (UNR Only)
Keywords: ENGINEERING, ENVIRONMENTAL (0775)
Abstract: In December 1998, the United States Environmental Protection Agency finalized the Stage 1 Disinfectant/Disinfection Byproduct (D/DBP) Rule and Interim Enhanced Surface Water Treatment Rule. USEPA's D/DBP Rule lowers the maximum contaminant level (MCL) for trihalomethanes from 100 $/mu$g/L, to 80 $/mu$g/L. If a water treatment facility cannot meet the MCL of 80 $/mu$g/L, upgrades may be required. The effect of chlorinating an aqueous leachate of six different plant types, Quaking Aspen, Fremont Cottonwood, Cheatgrass, Greenleaf Manzanita, Jeffrey Pine and Basin Big Sage was examined for trihalomethane and haloacetic acid formation potential. The various plants were collected from watersheds in the Reno-Tahoe area. Results show that the grass and coniferous trees formed less trihalomethanes and haloacetic acids than the other species. With proper watershed protection-management techniques, it may be possible to lower precursor compounds contributing to DBP formation. This would have economic benefits to treatment facilities while lowering health risks. Note: dissertation citations and abstracts contained here are published with permission of ProQuest Information and Learning. Further reproduction is prohibited without permission. Copies of dissertations may be obtained by addressing your request to UMI® Dissertation Services, 300 North Zeeb Road, Ann Arbor, MI 48106-1346 USA. Telephone (734) 761-7400; Web-page: wwwlib.umi.com/dissertations.
Advisor: Adams, V. Dean
Reference: 0-599-35484-4; MAI 37/05, p. 1501, Oct 1999
 

Author:
Kirick, Christine Maryann
Year: (2002)
Title: Trends in littoral zone turbidity at Lake Tahoe, California-Nevada.
Institution: University of Nevada Reno
No. Pages: 163
Thesis Type: MS
Link: Download (UNR Only)
Keywords: HYDROLOGY (0388); BIOLOGY, LIMNOLOGY (0793)
Abstract: A 30% decrease in clarity of the pelagic zone at Lake Tahoe over the past three decades has caused both policy makers and scientists to focus on preserving the exceptional clarity of the lake. Results from this study, which addressed near-shore turbidity for the period from 1991 to 2001, indicate that although statistically significant decreasing linear trends are present at five out of seven water utility intake sites, the slopes of the trend lines are negligible. Matrices of hydrologic and meteorological variables were analyzed using principal-components regression modeling to determine which factors may be impacting near-shore turbidity. The models indicated that lagged snow water equivalence and tributary discharge play dominant roles in determining turbidity on monthly, weekly, and daily time scales. On a 2-hr time scale, wave action caused by winds impacts near-shore turbidity although to what extent is not yet clear. Note: dissertation citations and abstracts contained here are published with permission of ProQuest Information and Learning. Further reproduction is prohibited without permission. Copies of dissertations may be obtained by addressing your request to UMI® Dissertation Services, 300 North Zeeb Road, Ann Arbor, MI 48106-1346 USA. Telephone (734) 761-7400; Web-page: wwwlib.umi.com/dissertations.
Advisor: McConnell, Joseph R.
Reference: 0-493-88106-9; MAI 41/03, p. 749, Jun 2003
 

Author:
LeNoir, James Sullivan
Year: (1999)
Title: Transport of current use pesticides to the Sierra Nevada mountain range.
Institution: University of Nevada Reno
No. Pages: 127
Thesis Type: PhD
Link: Download (UNR Only)
Keywords: ENVIRONMENTAL SCIENCES (0768); PHYSICS, ATMOSPHERIC SCIENCE (0608); BIOLOGY, ECOLOGY (0329); BIOLOGY, ZOOLOGY (0472); BIOLOGY, LIMNOLOGY (0793)
Abstract: This dissertation consists of work conducted on the atmospheric transport of pesticides from California's Central Valley to the Sierra Nevada mountains. During the winter of 1995–1996 single event wet deposition samples were collected at 533-m and 1,920-m elevations in the Sequoia National Park, located on the southwestern slope of the Sierra Nevada mountain range. Samples acquired at these locations contained chlorothalonil (0.57–85 ng/L), and chlorpyrifos, diazinon, and malathion ranging from 0.045–24 ng/L. Similar concentrations of chlorothalonil and chlorpyrifos were found in snow and surface water samples collected at Lake Tahoe in the central Sierra Nevada, during this time. Transport of pesticides during the summer months to the Sequoia National Park was assessed by collecting air, dry deposition and surface water samples in 1996. Pesticides found in highest concentrations matched peak summer applications of chlorpyrifos and endosulfan. Air concentrations ranged from 30 ng/m 3 at the 200-m elevation to below the limit of quantitation (0.5 pg/m 3) at the 1,920-m elevation. Surface water samples contained the same profile of pesticides as found in summer air. Detectable concentrations ranged from 0.4 ng/L to 122 ng/L. Surface water and frog tadpoles (Hyla regilla) were collected in 1998 in a transect of northern California from the Pacific Coast to Lake Tahoe. This study ascertained whether the agricultural communities of the Sacramento Valley were a significant source of pesticide residues to the northern Sierra Nevada mountain range. Detectable levels of diazinon were found in the surface waters in Sacramento Valley; no detectable pesticides were found past the foothills of the Sierras. While the data presented in this dissertation are not sufficient to make a complete evaluation of pesticide impact to the Sierra Nevada mountain range, conclusions can be made. Most pesticide concentrations show a clear correspondence between time and intensity of application rather than total annual usage. Pesticides in air, wet deposition and surface water are consistently higher at lower elevations, diminishing in higher elevations due to dilution and degradation during transport. Pesticide concentrations are below acute toxicity values for aquatic species. If pesticides are having an impact we were unable to determine an effect. Note: dissertation citations and abstracts contained here are published with permission of ProQuest Information and Learning. Further reproduction is prohibited without permission. Copies of dissertations may be obtained by addressing your request to UMI® Dissertation Services, 300 North Zeeb Road, Ann Arbor, MI 48106-1346 USA. Telephone (734) 761-7400; Web-page: wwwlib.umi.com/dissertations.
Advisor: Seiber, James Nicholas
Reference: 0-599-35442-9; DAI-B 60/06, p. 2589, Dec 1999
 

Author:
Maholland, Becky Lynn
Year: (2002)
Title: Geomorphic assessment of natural and anthropogenic sediment sources in an eastern Sierra Nevada watershed (California).
Institution: University of Nevada Reno
No. Pages: 178
Thesis Type: MS
Link: Download (UNR Only)
Keywords: HYDROLOGY (0388); GEOLOGY (0372)
Abstract: Squaw Creek, a small (21.1 km2), subalpine watershed located approximately 9.6 kilometers northwest of Lake Tahoe, California between the towns of Tahoe City and Truckee, is listed as an impaired waterway for excessive non-point source sedimentation under section 303(d) of the Clean Water Act. The watershed was evaluated from a geomorphic perspective to identify and characterize sources of sediment and sediment transport processes, quantify rates of hillslope and in-stream erosion, and assess the relative degree of impact of both natural and anthropogenic sediment sources on sediment delivery to the stream network. Calculated hillslope erosion rates show that the principal sources of sediment are related to land use impacts. Roads in the watershed contribute to sediment production by concentrating runoff which increases sediment load to the stream network. Most unimproved (dirt) roads connect either directly or indirectly with streams and therefore act as extensions of stream networks by effectively increasing watershed drainage density and subsequently sediment loads to streams. Geographic Information System modeling indicates that hillslope erosion susceptibility has increased in the watershed since 1939 as a result of land use impacts. Note: dissertation citations and abstracts contained here are published with permission of ProQuest Information and Learning. Further reproduction is prohibited without permission. Copies of dissertations may be obtained by addressing your request to UMI® Dissertation Services, 300 North Zeeb Road, Ann Arbor, MI 48106-1346 USA. Telephone (734) 761-7400; Web-page: wwwlib.umi.com/dissertations.
Advisor: Bullard, Thomas F.
Reference: MAI 42/01, p. 187, Feb 2004
 

Author:
Marcus, Jonathan Allen
Year: (1995)
Title: Subsurface mobility of colloidal and inorganic nitrogen and phosphorus within a Lake Tahoe watershed (Nevada).
Institution: University of Nevada Reno
No. Pages: 72
Thesis Type: MS
Link:
Keywords: HYDROLOGY (0388); ENVIRONMENTAL SCIENCES (0768)
Abstract: Watershed disturbance has been suggested as a possible mechanism for accelerated nutrient input into Lake Tahoe. However, little is known regarding how nutrient discharge is influenced by physio-chemical watershed processes. Recent investigations in the Lake Tahoe Basin suggest that colloidal nutrient transport can play an important role in the cycling of particle-reactive materials that influence lake and tributary water quality. The objective of this study was to use tension lysimeters and constant head permeameter leaching experiments to assess the soil solution and discharge leachate for inorganic and colloid nutrient (N and P) content and evaluate possible interactions between plot condition, depth, and nutrient discharge through statistical examination. Tension lysimeters were installed under three plot conditions (riparian, non-forested, forested) at selected locations throughout the Incline Creek watershed to measure the inorganic and colloid nutrient content (N and P) of soil solution following natural precipitation and during spring melt. In addition, intact soil cores were taken from the field at two depths from each of the three plot conditions and subjected to constant head permeameter leaching experiments. Incremental leachate discharge was then analyzed for concentrations of inorganic and colloid N and P. Soil column studies showed that the riparian and non- forested areas contributed the largest total amount of nitrogen and phosphorous, respectively. The colloidal form was mobile and the most dominant form for nitrogen. Colloidal phosphorous was unable to be determined. The mobility and presence of significant amounts of colloid N indicate that this once unrecognized nutrient form is an important component of Sierra Nevada watershed processes. Further characterization and transport modeling is essential to acquiring a better understanding of nutrient cycling in pristine alpine environments. Note: dissertation citations and abstracts contained here are published with permission of ProQuest Information and Learning. Further reproduction is prohibited without permission. Copies of dissertations may be obtained by addressing your request to UMI® Dissertation Services, 300 North Zeeb Road, Ann Arbor, MI 48106-1346 USA. Telephone (734) 761-7400; Web-page: wwwlib.umi.com/dissertations.
Advisor: Miller, W. W.
Reference: MAI 34/02, p. 690, Apr 1996
 

Author:
Melgin, Wendy Lynn
Year: (1985)
Title: The Influence of Hillslope Hydrology on Nitrate Transport in a Forested Watershed, near Lake Tahoe.
Institution: University of Nevada Reno
No. Pages: 79
Thesis Type: MS
Link:
Keywords: HYDROLOGY (0388)
Abstract: Abstract not available. Note: dissertation citations and abstracts contained here are published with permission of ProQuest Information and Learning. Further reproduction is prohibited without permission. Copies of dissertations may be obtained by addressing your request to UMI® Dissertation Services, 300 North Zeeb Road, Ann Arbor, MI 48106-1346 USA. Telephone (734) 761-7400; Web-page: wwwlib.umi.com/dissertations.
Advisor:
Reference: MAI 24/04, p. 370, Winter 1986
 

Author:
Mercer, Michael Mills
Year: (2002)
Title: Determining average basin rainfall using the WSR-88D for the Lake Tahoe and Truckee River watersheds (Nevada, California).
Institution: University of Nevada Reno
No. Pages: 109
Thesis Type: MS
Link: Download (UNR Only)
Keywords: HYDROLOGY (0388); PHYSICS, ATMOSPHERIC SCIENCE (0608)
Abstract: This study examines the effects of delineating high resolution basins with a minimum drainage area of 5 km2, and determines if any information is gained due to increased resolution. The Lake Tahoe and Truckee River watersheds were delineated using ArcView with the Spatial Analyst extension, and high resolution digital elevation model data. As a result basin boundaries were re-defined by as much as 1800 meters, creating more accurate watersheds. Precipitation estimates from the National Weather Service radar, KRGX, were mapped to high resolution basins where average basin rainfall was calculated. Rain gage estimates were compared to radar estimates to help determine the accuracy of the radar's estimated precipitation. Despite the relatively warm New Year's Flood event in 1997, the radar produced very poor precipitation estimates when compared to gage observations. The root mean square error was 9.187 when comparing gage data with data derived from current radar precipitation algorithms. Note: dissertation citations and abstracts contained here are published with permission of ProQuest Information and Learning. Further reproduction is prohibited without permission. Copies of dissertations may be obtained by addressing your request to UMI® Dissertation Services, 300 North Zeeb Road, Ann Arbor, MI 48106-1346 USA. Telephone (734) 761-7400; Web-page: wwwlib.umi.com/dissertations.
Advisor: Pohll, Greg
Reference: 0-493-76287-6; MAI 41/01, p. 167, Feb 2003
 

Author:
Naslas, George Dimitris
Year: (1991)
Title: Infiltration, runoff, nutrient and sediment transport analysis of soils in the Lake Tahoe Basin through rainfall simulation.
Institution: University of Nevada Reno
No. Pages: 212
Thesis Type: MS
Link:
Keywords: HYDROLOGY (0388)
Abstract: Quantitative erosion, infiltration and nutrient transport data for the Lake Tahoe Basin are limited. Meeks and Umpa soils were subjected to a simulated storm event, using a modular simulator, in order to determine infiltration, runoff and sediment transport rates and runoff was analysed for soluble nutrients. Three slope gradients and four plot conditions were studied per soil type. The interaction of soil type and plot condition controlled maximum nitrate concentration, with mean maximum nitrate concentrations of 1.486 and 0.57 mg l-1 for the Umpa and Meeks respectively. The interaction between soil type, plot condition and slope significantly controlled infiltration and runoff (P = 0.0011) and erosion (P = 0.0164). Maximum 1-hr final infiltration rates of 4.5 and 6.1 cm hr-1 were measured for the Meeks and Umpa soils respectively. Wooded plots exhibited strong water repellency resulting in 75-97% of the applied water running off. Sediment and nitrate release were not related. Note: dissertation citations and abstracts contained here are published with permission of ProQuest Information and Learning. Further reproduction is prohibited without permission. Copies of dissertations may be obtained by addressing your request to UMI® Dissertation Services, 300 North Zeeb Road, Ann Arbor, MI 48106-1346 USA. Telephone (734) 761-7400; Web-page: wwwlib.umi.com/dissertations.
Advisor:
Reference: MAI 30/01, p. 86, Spring 1992
 

Author:
Ramsing, Frederick John
Year: (2000)
Title: Measurement of groundwater seepage into Lake Tahoe and estimation of nutrient transport from a Lake Tahoe watershed (Nevada).
Institution: University of Nevada Reno
No. Pages: 163
Thesis Type: MS
Link: Download (UNR Only)
Keywords: HYDROLOGY (0388); GEOLOGY (0372); ENVIRONMENTAL SCIENCES (0768); PHYSICAL GEOGRAPHY (0368)
Abstract: This study determined the groundwater nutrient flux into Lake Tahoe for a small watershed, Incline Creek. Seepage meters measured direct groundwater discharge from the watershed. Stable isotope analysis of deuterium and 18O from interstitial pore water in lakebed sediments validated measurements. Nutrient concentrations from nearby wells were multiplied by groundwater discharge to determine total direct groundwater nutrient flux. Calculations showed only 8 to 24 acre·ft/yr, less than 1% of the watershed budget, discharging directly as groundwater. However, 30 kg/yr of soluble inorganic nitrogen, or 14% of the watershed budget, discharged from groundwater. Groundwater contribution of soluble reactive phosphorous was insignificant. An emulated seepage run was performed by analyzing existing streamflow data to determine whether groundwater was being intercepted as seepage to streams in the lower basin. Note: dissertation citations and abstracts contained here are published with permission of ProQuest Information and Learning. Further reproduction is prohibited without permission. Copies of dissertations may be obtained by addressing your request to UMI® Dissertation Services, 300 North Zeeb Road, Ann Arbor, MI 48106-1346 USA. Telephone (734) 761-7400; Web-page: wwwlib.umi.com/dissertations.
Advisor: Tyler, Scott W.
Reference: 0-599-92294-X; MAI 39/02, p. 466, Apr 2001
 

Author:
Rhea, Sherry Alison
Year: (1993)
Title: Extent and mobility of colloidal nitrogen and phosphorous in runoff and subsurface infiltrate from a Tahoe Basin forested watershed.
Institution: University of Nevada Reno
No. Pages: 121
Thesis Type: MS
Link:
Keywords: HYDROLOGY (0388)
Abstract: Recent small-scale investigations have suggested that inorganic nitrogen and phosphorous as s dissolved organic (colloidal) forms that are easily transported may be a significant means of nutrient mobility in the Tahoe Basin. Rainfall simulation was used to assess the presence of colloidal nitrogen and phosphorous in runoff and subsurface infiltrate from a Lake Tahoe Basin forested watershed. Rainfall simulation experiments were conducted on open and forested plots with varying slopes. Results indicate that colloidal nitrogen and phosphorous are present in the system. Colloidal N increases post- simulation event, whereas colloidal P decreases. Five soil sampling sites were chosen throughout the Incline Creek watershed to examine the extent and mobility of colloidal N and P. Soil samples were collected during the summer of 1992, six years into the most recent drought period, and then resampled in the early summer of 1993 following a near record snow pack. The magnitude of the natural winter precipitation event was 17 times greater than rainfall simulation application. Apparent mobility of colloidal N and P was found for some sites, and was not detected for other sites. Colloidal N concentrations generally increased after the snowpack melted, while colloidal P decreased. (Abstract shortened by UMI.) Note: dissertation citations and abstracts contained here are published with permission of ProQuest Information and Learning. Further reproduction is prohibited without permission. Copies of dissertations may be obtained by addressing your request to UMI® Dissertation Services, 300 North Zeeb Road, Ann Arbor, MI 48106-1346 USA. Telephone (734) 761-7400; Web-page: wwwlib.umi.com/dissertations.
Advisor: Miller, W. W.
Reference: MAI 32/05, p. 1353, Oct 1994
 

Author:
Rhodes, Jonathan Jose Griffith
Year: (1985)
Title: A Reconnaissance of Hydrologic Nitrate Transport in an Undisturbed Watershed near Lake Tahoe (Precipitation, Groundwater, Snowmelt).
Institution: University of Nevada Reno
No. Pages: 271
Thesis Type: MS
Link:
Keywords: HYDROLOGY (0388)
Abstract: Abstract not available. Note: dissertation citations and abstracts contained here are published with permission of ProQuest Information and Learning. Further reproduction is prohibited without permission. Copies of dissertations may be obtained by addressing your request to UMI® Dissertation Services, 300 North Zeeb Road, Ann Arbor, MI 48106-1346 USA. Telephone (734) 761-7400; Web-page: wwwlib.umi.com/dissertations.
Advisor:
Reference: MAI 24/03, p. 238, Fall 1986
 

Author:
Rost, Andy Lloyd
Year: (2003)
Title: Predicting stream flow statistics in the ungaged watersheds of the Lake Tahoe Basin for fisheries habitat assessment (Nevada, California).
Institution: University of Nevada Reno
No. Pages: 150
Thesis Type: MS
Link: Download (UNR Only)
Keywords: HYDROLOGY (0388); AGRICULTURE, FISHERIES AND AQUACULTURE (0792)
Abstract: This study predicts a stream's potential to provide optimal habitat for salmonid species in the tributary streams of the Lake Tahoe Basin. Predictions are based on coupled estimates of flow regime and instream flow requirements for both the gauged and ungauged streams. Statistical relationships are established correlating recorded flow regimes with individual geographic and geomorphic watershed attributes. In the same manner, correlations are established between recorded instream flow requirements for selected streams in the Lake Tahoe Basin with watershed attributes. With robust statistical relationships established, estimates of flow statistics and optimal instream flow requirements are made for 55 selected streams. Once these estimates are coupled, a streams potential can be assessed. It is estimated that few of the Lake Tahoe tributary streams have flow conditions to provide optimal habitat conditions for salmonid species. In every modeled stream, flow conditions to maintain optimal habitat have a less than 50% probability of occurring during the summer and early fall months. The winter months are only slightly better, while the spring snow melt months have a significantly higher probability of maintaining optimal habitat. Note: dissertation citations and abstracts contained here are published with permission of ProQuest Information and Learning. Further reproduction is prohibited without permission. Copies of dissertations may be obtained by addressing your request to UMI® Dissertation Services, 300 North Zeeb Road, Ann Arbor, MI 48106-1346 USA. Telephone (734) 761-7400; Web-page: wwwlib.umi.com/dissertations.
Advisor: Tracy, John
Reference: MAI 42/01, p. 188, Feb 2004
 

Author:
Schwaneflugel, Andrew Kidd
Year: (2002)
Title: Forms of nitrogen and phosphorous in free-draining pore water in a Lake Tahoe soil (Nevada).
Institution: University of Nevada Reno
No. Pages: 93
Thesis Type: MS
Link: Download (UNR Only)
Keywords: ENVIRONMENTAL SCIENCES (0768); HYDROLOGY (0388)
Abstract: Zero-tension lysimeters were used to collect spring snow melt from soil beneath forested, open, and grus plot conditions in the Incline Creek, NV, watershed. Snow cores and lysimeter samples were analyzed for inorganic, colloidal, and particulate forms of nitrogen and phosphorous as well as electrical conductivity, pH, Eh, and the E4/E6 ratios of the colloidal/dissolved organics. The digestible forms of nitrogen and phosphorous were greater than inorganic forms in the snowcores. Cumulative loadings for the spring run-off indicate that the colloidal and particulate forms are important components of mobile nitrogen and phosphorous within these soils. Plot condition had a significant effect on total particulate nitrogen loading but did not affect inorganic or colloidal loading. Note: dissertation citations and abstracts contained here are published with permission of ProQuest Information and Learning. Further reproduction is prohibited without permission. Copies of dissertations may be obtained by addressing your request to UMI® Dissertation Services, 300 North Zeeb Road, Ann Arbor, MI 48106-1346 USA. Telephone (734) 761-7400; Web-page: wwwlib.umi.com/dissertations.
Advisor: Miller, Wally W.
Reference: MAI 42/01, p. 196, Feb 2004
 

Author:
Smolen, Katrina D.
Year: (2004)
Title: Trout Creek stream restoration and wildlife enhancement project water quality monitoring (California).
Institution: University of Nevada Reno
No. Pages: 134
Thesis Type: MS
Link: Download (UNR Only)
Keywords: HYDROLOGY (0388); ENGINEERING, ENVIRONMENTAL (0775); AGRICULTURE, FISHERIES AND AQUACULTURE (0792); BIOLOGY, LIMNOLOGY (0793)
Abstract: The water quality of Trout Creek, South Lake Tahoe, California, was monitored to ascertain the stream system's response to restoration. The restoration of Trout Creek was completed in August 2001. The sediment and nutrients in the surface water, groundwater, and soils were studied between August 2000 and August 2002. Linear relationships exist between turbidity, suspended sediment, nitrogen and phosphorous. Therefore, the application of turbidimeters is a cost-effective surrogate for measuring suspended sediment and nutrients continuously and in real time. This study is a principal endeavor in the Tahoe Basin to conduct a systematic evaluation of sediment and nutrient flux in surface water and ground water pre and post restoration. Note: dissertation citations and abstracts contained here are published with permission of ProQuest Information and Learning. Further reproduction is prohibited without permission. Copies of dissertations may be obtained by addressing your request to UMI® Dissertation Services, 300 North Zeeb Road, Ann Arbor, MI 48106-1346 USA. Telephone (734) 761-7400; Web-page: wwwlib.umi.com/dissertations.
Advisor: Jacobson, Roger L.
Reference: MAI 42/06, p. 2138, Dec 2004
 

Author:
Sullivan, Adam G.
Year: (1999)
Title: Alluvial process and geomorphic effectiveness on two Tahoe streams (California).
Institution: University of Nevada Reno
No. Pages: 100
Thesis Type: MS
Link: Download (UNR Only)
Keywords: HYDROLOGY (0388)
Abstract: Stream management and effective stream restoration require an understanding of the variables that directly influence processes that shape the channel. To understand current processes on two alluvial streams targeted for stream restoration, this study examined their geomorphic response to the January 1997 rain-on-snow flood and the 1997 and 1998 spring snowmelt runoff peaks. Sediment transport was compared among the three flow peaks in relation to patterns of exerted unit stream power. Changes in cross-sectional channel geometry were compared to patterns of stream power and channel geometry, vegetation community types, soil types, and available historical information. Stream power depends greatly on slope, and floodplain accessibility attenuates peak stream power. Neither peak nor cumulative unit stream power accurately gauged changes in channel geometry. Stream power estimated bedload transport differently than the Meyer-Peter Muller equation. Vegetation communities and soil types did not significantly correlate with changes in channel width. Spring runoff peaks dominate winter rain-on-snow peaks in cumulative sediment yield over time. The high magnitude of winter rain-on-snow runoff peaks accelerates the progression of natural recovery in incised but narrow alluvial channels. A multidisciplinary perspective on stream management and alluvial channel evolution puts channel changes into context and orients stream restoration efforts towards facilitating natural recovery. Note: dissertation citations and abstracts contained here are published with permission of ProQuest Information and Learning. Further reproduction is prohibited without permission. Copies of dissertations may be obtained by addressing your request to UMI® Dissertation Services, 300 North Zeeb Road, Ann Arbor, MI 48106-1346 USA. Telephone (734) 761-7400; Web-page: wwwlib.umi.com/dissertations.
Advisor: Swanson, Sherman
Reference: 0-599-64872-4; MAI 38/04, p. 961, Aug 2000
 

Author:
Sullivan, Matthew David
Year: (2000)
Title: Hydrological studies conducted in the Upper Incline Creek watershed, Nevada.
Institution: University of Nevada Reno
No. Pages: 178
Thesis Type: MS
Link: Download (UNR Only)
Keywords: HYDROLOGY (0388)
Abstract: Several hydrological studies were conducted in the Upper Incline Creek watershed, Nevada, located in the Lake Tahoe basin. The first study examined a method for combining field data with an existing GIS database to define spatial variations in infiltration. The second study used the computer model HSPF to simulate discharge and compared two different scenarios: one that visualized the watershed as one pervious land segment (PLS); the other as multiple PLSs. Both scenarios were capable of duplicating observed discharges equally well, but the scenario using multiple PLS provided a better understanding of the physical characteristics of the watershed. The last study compared two methods of estimating sediment loads generated from rainfall: one used an empirically-based linear-regression method, and the other used a physically-based computer model (HSPF). Whereas sediment load from summer storms is small compared to the total annual load, occasional extreme events can generate a significant amount of sediment. Note: dissertation citations and abstracts contained here are published with permission of ProQuest Information and Learning. Further reproduction is prohibited without permission. Copies of dissertations may be obtained by addressing your request to UMI® Dissertation Services, 300 North Zeeb Road, Ann Arbor, MI 48106-1346 USA. Telephone (734) 761-7400; Web-page: wwwlib.umi.com/dissertations.
Advisor: Warwick, John J.
Reference: 0-599-92300-8; MAI 39/02, p. 467, Apr 2001
 

Author:
Sutherland, James Colin
Year: (2001)
Title: Eighteenth century logging and the geomorphic response of a montane watershed in the Carson Range, western Nevada.
Institution: University of Nevada Reno
No. Pages: 115
Thesis Type: MS
Link: Download (UNR Only)
Keywords: HYDROLOGY (0388); AGRICULTURE, FORESTRY AND WILDLIFE (0478); ENVIRONMENTAL SCIENCES (0768)
Abstract: Vicee Canyon, a small (5.2 km2), steep watershed on the east slope of the Carson Range, contains important information on what effects large scale logging during the late 1800s had on the geomorphic stability of this drainage basin. Similarities of Vicee Canyon to drainages in the Lake Tahoe basin allow the knowledge gained through this study to be applied in watersheds that affect the fragile ecosystems of the lake. Vicee Canyon was selected both for its depositional record that spans the latest Holocene and for the wealth of historical records and human artifacts associated with this watershed. Stratigraphic analysis, radiocarbon dating, and dendrochronology were used in concert with historic records and artifacts to determine that the Comstock-era logging in fact caused an increase in the amount of sediment being delivered to the channel in Vicee Canyon. A large portion of this historic sediment has made its way out of the drainage to the alluvial fan, while a small amount remains in storage along the channel walls of the drainage basin. Note: dissertation citations and abstracts contained here are published with permission of ProQuest Information and Learning. Further reproduction is prohibited without permission. Copies of dissertations may be obtained by addressing your request to UMI® Dissertation Services, 300 North Zeeb Road, Ann Arbor, MI 48106-1346 USA. Telephone (734) 761-7400; Web-page: wwwlib.umi.com/dissertations.
Advisor: Wells, Stephen G.
Reference: 0-493-36599-0; MAI 40/02, p. 420, Apr 2002
 

Author:
Tarnay, Leland William
Year: (2001)
Title: Atmospheric nitrogen deposition to the Lake Tahoe Basin, California/Nevada.
Institution: University of Nevada Reno
No. Pages: 111
Thesis Type: PhD
Link: Download (UNR Only)
Keywords: BIOGEOCHEMISTRY (0425); ENVIRONMENTAL SCIENCES (0768); BIOLOGY, ECOLOGY (0329); BIOLOGY, LIMNOLOGY (0793)
Abstract: Decreases in the clarity of Lake Tahoe have been attributed in part to atmospheric nitrogen deposition, however no estimates of dry deposition of N-containing gases to the semi-arid Lake Tahoe Basin have been performed. This research shows that the possible range of dry fluxes, calculated from preliminary nitric acid (HNO3) and ammonia (NH3) measurements, were much higher (1.2 to 8.6 kg N ha−1 yr−1 ) for Lake Tahoe's watershed than for the surface of Lake Tahoe itself (0.58 to 1.2 kg N ha−1 yr−1), largely due to the high affinity of HNO3 for the leaf surfaces to which it deposits. Laboratory gas exchange experiments on conifers native to the Lake Tahoe Basin found that accumulation of HNO3 on leaf surfaces reduces this affinity. Accounting for this phenomenon in a "bigleaf" inferential model at a representative site in the Tahoe Basin reduced estimated HNO3 flux by 30%. Scaling these improved estimates to the entire Tahoe Basin required coupling the inferential model with a GIS framework and simultaneous measurements of the major N-containing gases occurring within the Tahoe Basin. Both local and regional sources contributed to the resulting fluxes (0.7 to 2.1 kg N ha−1 yr−1), which varied nonlinearly with forest canopy cover across the landscape. Watershed retention estimates based on these inputs are as a result both lower (average = 50%) and more variable (10 to 90%) than previously considered. These results demonstrate how Tahoe's forested watersheds capture local and regional pollutants more efficiently than the lake itself and imply that watershed processes control more of the Lake Tahoe N budget than previously considered. The results also indicate that other "pristine" semi-arid forests in the West may be receiving substantial amounts of N via dry deposition from regional sources. Local-scale assessments that integrate model data and land-cover within a GIS framework will be necessary to determine the magnitude of these inputs, and their potential for causing eutrophication. Note: dissertation citations and abstracts contained here are published with permission of ProQuest Information and Learning. Further reproduction is prohibited without permission. Copies of dissertations may be obtained by addressing your request to UMI® Dissertation Services, 300 North Zeeb Road, Ann Arbor, MI 48106-1346 USA. Telephone (734) 761-7400; Web-page: wwwlib.umi.com/dissertations.
Advisor: Gertler, Alan
Reference: 0-493-56393-8; DAI-B 63/02, p. 703, Aug 2002
 

Author:
Westphal, Jerome Anthony
Year: (1973)
Title: Digital Simulation of Inorganic Water Quality of Tahoe- Truckee System, Nevada-California.
Institution: University of Nevada Reno
No. Pages: 239
Thesis Type: PHD
Link:
Keywords: HYDROLOGY (0388); ENERGY (0791)
Abstract:
Advisor:
Reference: DAI-B 34/09, p. 4485, Mar 1974