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Articles 1 - 30 of 40
Full-Text Articles in Earth Sciences
Hydrogeology And Hydrogeochemistry Of The Shallow Alluvial Aquifer Zone, Las Vegas Valley, Nevada, Harry Stephen Wild Jr.
Hydrogeology And Hydrogeochemistry Of The Shallow Alluvial Aquifer Zone, Las Vegas Valley, Nevada, Harry Stephen Wild Jr.
UNLV Theses, Dissertations, Professional Papers, and Capstones
In Las Vegas Valley, Nevada, the shallow alluvial aquifer zone is a possible source of contamination to the principal alluvial aquifers that provide 30% of the public drinking water supply for the valley. Development of the principal aquifers has lowered pressure head in the principal aquifers and created the potential for downward seepage from the shallow aquifer zone. This study was undertaken to characterize the hydrogeology and hydrogeochemistry of the shallow alluvial aquifer zone and to compare the hydrogeochemistry of the shallow and principal alluvial aquifer zones.
A 37 well shallow ground water monitoring network was established and water-level, water-quality, …
Modeling Mass Transport In Aquifers: The Distributed Source Problem, Sergio E. Serrano
Modeling Mass Transport In Aquifers: The Distributed Source Problem, Sergio E. Serrano
KWRRI Research Reports
This report presents a new methodology to model the time and space evolution of groundwater variables in a system of aquifers when certain components of the model, such as the geohydrologic information, the boundary conditions, the magnitude and variability of the sources or physical parameters are uncertain and defined in stochastic terms. This facilitates a more realistic statistical representation of groundwater flow and groundwater pollution forecasting for either the saturated or the unsaturated zone. The method is based on applications of modern mathematics to the solution of the resulting stochastic transport equations. This procedure exhibits considerable advantages over the existing …
Effects Of Aromatic Concentration On Methane Fermentation, Yi-Tin Wang, Pin-Chieh Pai, H. David Gabbard
Effects Of Aromatic Concentration On Methane Fermentation, Yi-Tin Wang, Pin-Chieh Pai, H. David Gabbard
KWRRI Research Reports
The anaerobic biodegradability and toxicity of fourteen aromatic compounds were evaluated over a wide range of concentrations using a serum bottle technique. Benzene, toluene, and all three isomers of xylene were not significantly degraded to methane in a phenol-enriched culture. Complete degradation of 1000 mg/L phenol, 800 mg/L catechol, 100 mg/L 2-NP, 100 mg/L 3- NP, and 100 mg/L 4-NP was observed within two months while depletion of 100 mg/L resorcinol and 1000 mg/L hydroquinone required more than six and eight months incubation, respectively. None of the three isomers of chlorophenol were degraded in the phenol-enriched culture. Batch toxicity assay …
Water Transfers: Can They Protect And Enhance Rural Economies?, Michael J. Clinton
Water Transfers: Can They Protect And Enhance Rural Economies?, Michael J. Clinton
Moving the West's Water to New Uses: Winners and Losers (Summer Conference, June 6-8)
16 pages.
Shifting Water To Urban Uses: Activities Of The Metropolitan Water District Of Southern California, Timothy H. Quinn
Shifting Water To Urban Uses: Activities Of The Metropolitan Water District Of Southern California, Timothy H. Quinn
Moving the West's Water to New Uses: Winners and Losers (Summer Conference, June 6-8)
36 pages.
Contains references.
Water Marketing And The Law, Mark Squillace
Water Marketing And The Law, Mark Squillace
Moving the West's Water to New Uses: Winners and Losers (Summer Conference, June 6-8)
13 pages.
Legal Devices For Enhancing Water Diversion Opportunities Within The Appropriation System, David C. Hallford
Legal Devices For Enhancing Water Diversion Opportunities Within The Appropriation System, David C. Hallford
Moving the West's Water to New Uses: Winners and Losers (Summer Conference, June 6-8)
28 pages.
Transferring Conserved Water: The Oregon Experience, Becky Kreag
Transferring Conserved Water: The Oregon Experience, Becky Kreag
Moving the West's Water to New Uses: Winners and Losers (Summer Conference, June 6-8)
28 pages.
Contains references.
Economic And Social Impacts Of Agriculture-To-Urban Water Transfers: The Arkansas Valley Of Colorado, Charles W. Howe, Jeffrey K. Lazo
Economic And Social Impacts Of Agriculture-To-Urban Water Transfers: The Arkansas Valley Of Colorado, Charles W. Howe, Jeffrey K. Lazo
Moving the West's Water to New Uses: Winners and Losers (Summer Conference, June 6-8)
20 pages.
Contains 1 page of references.
Evaluating Judicial Capacity To Determine Public Welfare Values In Water Transfers, Charles T. Dumars
Evaluating Judicial Capacity To Determine Public Welfare Values In Water Transfers, Charles T. Dumars
Moving the West's Water to New Uses: Winners and Losers (Summer Conference, June 6-8)
31 pages (includes illustrations).
Contains references.
Water Agencies And Water Transfers In California: A Case Study Of The Kern County Water Agency, Brian E. Gray
Water Agencies And Water Transfers In California: A Case Study Of The Kern County Water Agency, Brian E. Gray
Moving the West's Water to New Uses: Winners and Losers (Summer Conference, June 6-8)
20 pages.
Contains references.
The Role Of Market Transfers In The Accommodation Of New Uses: A Case Study Of The Truckee-Carson Basin, A. Dan Tarlock
The Role Of Market Transfers In The Accommodation Of New Uses: A Case Study Of The Truckee-Carson Basin, A. Dan Tarlock
Moving the West's Water to New Uses: Winners and Losers (Summer Conference, June 6-8)
31 pages (includes 1 map).
The Role Of The Federal Energy Regulatory Commission In Protecting Non-Consumptive Water Uses, Peter J. Kirsch, J. Barton Seitz
The Role Of The Federal Energy Regulatory Commission In Protecting Non-Consumptive Water Uses, Peter J. Kirsch, J. Barton Seitz
Moving the West's Water to New Uses: Winners and Losers (Summer Conference, June 6-8)
55 pages.
Urban Water Conservation: The Last Water Hole Or Mostly A Mirage?, Gary C. Woodward
Urban Water Conservation: The Last Water Hole Or Mostly A Mirage?, Gary C. Woodward
Moving the West's Water to New Uses: Winners and Losers (Summer Conference, June 6-8)
28 pages.
Contains references.
Update On Market Strategies For The Protection Of Western Instream Flows And Wetlands, Robert Wigington
Update On Market Strategies For The Protection Of Western Instream Flows And Wetlands, Robert Wigington
Moving the West's Water to New Uses: Winners and Losers (Summer Conference, June 6-8)
49 pages.
Contains references.
Sources Of Water Iv: Tribal Water Rights, John E. Echohawk
Sources Of Water Iv: Tribal Water Rights, John E. Echohawk
Moving the West's Water to New Uses: Winners and Losers (Summer Conference, June 6-8)
10 pages.
Contains references.
Sources Of Water Iii: Interstate Transfers, Clyde O. Martz
Sources Of Water Iii: Interstate Transfers, Clyde O. Martz
Moving the West's Water to New Uses: Winners and Losers (Summer Conference, June 6-8)
35 pages.
Contains references.
Sources Of Water I: Agriculture – The Deep Pool?, Bonnie G. Colby
Sources Of Water I: Agriculture – The Deep Pool?, Bonnie G. Colby
Moving the West's Water to New Uses: Winners and Losers (Summer Conference, June 6-8)
34 pages (includes illustration).
Contains 2 pages of references.
Sources Of Water Ii: Federal Water Projects, Bruce C. Driver
Sources Of Water Ii: Federal Water Projects, Bruce C. Driver
Moving the West's Water to New Uses: Winners and Losers (Summer Conference, June 6-8)
46 pages.
Contains references.
Shifting The Uses Of Water In The West: An Overview, Lawrence J. Macdonnell
Shifting The Uses Of Water In The West: An Overview, Lawrence J. Macdonnell
Moving the West's Water to New Uses: Winners and Losers (Summer Conference, June 6-8)
31 pages.
Contains references.
Changing Demand For Water In The West, Kenneth D. Frederick
Changing Demand For Water In The West, Kenneth D. Frederick
Moving the West's Water to New Uses: Winners and Losers (Summer Conference, June 6-8)
19 pages.
Contains references.
Agenda: Moving The West's Water To New Uses: Winners And Losers, University Of Colorado Boulder. Natural Resources Law Center
Agenda: Moving The West's Water To New Uses: Winners And Losers, University Of Colorado Boulder. Natural Resources Law Center
Moving the West's Water to New Uses: Winners and Losers (Summer Conference, June 6-8)
Conference organizers and/or faculty included University of Colorado Law School professors Lawrence J. MacDonnell and Mark Squillace.
Moving the West's Water to New Uses: Winners and Losers will be the theme for this year's water conference, June 6-8 at the Law School in Boulder. The conference will consider the changing demands for water in the West and the need to reallocate a portion of the existing uses of water to new uses.
The first day will provide the background by looking at the most likely sources of water to meet these demands, including agriculture, federal water projects, interstate transfers, and …
A Preliminiary Investigation To Determine The Economic Implications Of The "404" Permit For Constructing Agriculturally Related Reservoirs In Arkansas, Richard K. Ford, Charles R. Britton
A Preliminiary Investigation To Determine The Economic Implications Of The "404" Permit For Constructing Agriculturally Related Reservoirs In Arkansas, Richard K. Ford, Charles R. Britton
Technical Reports
A descriptive inquiry of the economic consequences of federal regulations which restrict the construction of agriculturally related reservoirs in Arkansas's wetlands is presented in this report. The applicable economic principles are identifyed and applied to the situation without the quantifiable information necessary to evaluate the alternatives. The difficulty of collecting the required quantifiable information necessitates the formulation of a different technique to unravel the dilemma. An alternative method for resolving the wetlands allocation question is presented for a public sector decision maker. This unconventional technique suggests that it may be desirable to estimate and compare the costs associated with the …
Virus Reduction By The Stanford Onsite Wastewater Treatment System, Mark A. Gross
Virus Reduction By The Stanford Onsite Wastewater Treatment System, Mark A. Gross
Technical Reports
A field study to examine the Stanford Onsite Wastewater Treatment System's ability to remove bacteriophage from wastewater was conducted. MS2 Coliphage was Injected Into the low pressure pipe (LPP) distribution system to achieve an Influent concentration of 1.6 x 106 plague forming units per milliliter (PFU/ml). The bacteriophage was Injected Into the system three times during the day, and samples were taken from drainage tiles of the treatment system. Tile drainage was assayed on conform bacteria host cultures for MS2 phage. The treatment system removed two to three logs (99% to 99.9%) of the phage. During the past two years, …
Dew Chemistry, G. H. Wagner
Dew Chemistry, G. H. Wagner
Technical Reports
From July, 1989 to July 1990 a total of 98 dews and 9 frosts were collected at the University of Arkansas Agricultural Experiment Station, Fayetteville. The total water flux from dews and frosts per year is less than 2% of that from rains. Acid and nutrient fluxes are also much lower in dew. In the following series of ions the number in parenthesis gives the % of the yearly flux of the ion in dew compared to rain for an average year: H+ (0.08), Ca2+ (23), Mg2+(9), K+(20), Na+(5), NH+(12), Cl-(7), S02/4-(5) and N0-/3 (6). A typical dew has a …
An Evaluation Of The Effect Of Discharging A High Quality Effluent Into A Small Ozark Mountain Stream, David G. Parker, Floyd E. Cotter, Sandra C. Parker
An Evaluation Of The Effect Of Discharging A High Quality Effluent Into A Small Ozark Mountain Stream, David G. Parker, Floyd E. Cotter, Sandra C. Parker
Technical Reports
Recently the newly constructed Fayetteville wastewater treatment plant went on line and directed a portion of its discharge to a point in the Mud Creek drainage basin that had previously not received any effluent. Prior to the discharge, a background study had been performed to establish the water quality in the basin. The background data, when compared to the data collected by this study, allowed any alteration of the stream water quality to be evaluated. Also the modeling procedure used to set the effluent limits for the treatment plant was analyzed. All stream data were compared to the limits set …
Fate Of Nitrogen From The Disposal Of Poultry Litter: A Simulation Approach, B. A. Ibrahim, H D. Scott
Fate Of Nitrogen From The Disposal Of Poultry Litter: A Simulation Approach, B. A. Ibrahim, H D. Scott
Technical Reports
A computer program was written to simulate the transport of nitrogen after an application of poultry litter to a pasture. The program was written in FORTRAN 77 to run on an IBM PC/AT or compatible personal computer or on a Sun SPARCSTATION. Simulation of water, solute and heat transport was by finite difference. Partition of rainfall into infiltration and runoff was by the SCS curve number method. A comparison was made of the computer model output with the results of a field experiment established at the Main Agricultural Experiment Station at Fayetteville. Poultry litter was applied at a rate of …
Optimal Reservoir Design Criteria In Conjuctive Use Of Surface Water And Groundwater For Soybean Irrigation In Eastern Arkansas, D. R. Edwards, J. A. Ferguson
Optimal Reservoir Design Criteria In Conjuctive Use Of Surface Water And Groundwater For Soybean Irrigation In Eastern Arkansas, D. R. Edwards, J. A. Ferguson
Technical Reports
A computer simulation model, named Arkansas Offstream Reservoir Analysis (ARORA) was developed to simulate present worth of net income from soybean production systems for conditions varying with respect to ground water availability, offstream reservoir capacity, and many other variables. Additional algorithms were incorporated into the model to enable it to optimize reservoir dimensions given realistic constraints and to identify the reservoir capacity corresponding to maximum present worth of simulated net income. The model was written in FORTRAN programming language and requires significant input data in order to provide significant flexibility with respect to the situations which may be accomodated. The …
Presentation Of Verified Algal Taxa As Reference Sources - Phase Ii, Richard L. Meyer
Presentation Of Verified Algal Taxa As Reference Sources - Phase Ii, Richard L. Meyer
Technical Reports
The focus of this research project was to continue the development of a photographic system which would record living organisms using various forms of light microscopy with correct color and with arrested movement. These demands dictate the use of an electronic flash source with metering and control system located in a position following the passage of the light through the optical train. The system developed uses off-the-shelf components with a modified flashtube holder which positions the tube in the axis of the light beam between the field and iris diaphragm. The light is measured off-the-film so that light from the …
Using Pumps And Syphons To Control Salinity At A Saline Seep In The Wallatin Creek Catchment, Richard J. George Dr, P W C Frantom
Using Pumps And Syphons To Control Salinity At A Saline Seep In The Wallatin Creek Catchment, Richard J. George Dr, P W C Frantom
Resource management technical reports
No abstract provided.