Open Access. Powered by Scholars. Published by Universities.®
- Institution
- Keyword
-
- Irrigation (4)
- Water quality (4)
- Water resources (4)
- Submerged flow (3)
- Water management (3)
-
- Water planning (3)
- Canal design (2)
- Contamination (2)
- Development (2)
- Hydrologic inventory (2)
- Hydrology (2)
- Planning (2)
- Research and Technical Reports (2)
- Water (2)
- Water policy (2)
- Water supply (2)
- Accumulations (1)
- Aerial research (1)
- Aesthetics (1)
- Agricultural and urban integration (1)
- Agricultural development (1)
- Agricultural industrial use (1)
- Agriculture use (1)
- Air temperature;; data collection;; field data;; highway;; hydrographs;; hyetographs;; rainfall;; retention;; soil moisture;; storms;; runoff;; watershed;; wind (1)
- Algae (1)
- Algebraic equations;; highway;; hydrologic soil groups;; hydrology;; infiltration;; infiltration capacity;; infiltration rate;; laboratory studies;; mathematical models;; parametric models;; plant cover;; rain infiltration;; runoff curve number;; sideslopes;; soils;; soil classifications;; soil moisture;; standard curve;; turf;; urban (1)
- Alternative energy (1)
- Alternative options (1)
- Analysis (1)
- Analysis;; computer;; experiments;; flood routing;; highway;; hydrographs;; hydrology;; inlet;; mathematical models;; rainfall;; runoff;; storms;; urban;; watersheds (1)
- Publication Year
Articles 1 - 30 of 548
Full-Text Articles in Engineering
Hydrologic Efficiency In Water Conservation, L. Douglas James
Hydrologic Efficiency In Water Conservation, L. Douglas James
Reports
Introduction: The hydrologic cycle can be subdivided into three phases: 1)Humidity is transported within the atmosphere and becomes precipitation, and 2) Water moves downhill until eventually reaching the sea while all the time 3) Evapotranspiration returns exposed moisture to the atmosphere. During its movement, flowing water transports suspended sediments and dissolved minerals to reshape landforms and redistribute the mineral composition of the earth's surface throughout geologic time. It is during the second phase that flowing water can be diverted for uses that generally add to evaportranspiration (through consumptive use) and transport (through waste disposal). The water resources development that serves …
Solving Problems In Water Quality, Utah Water Research Laboratory
Solving Problems In Water Quality, Utah Water Research Laboratory
Reports
No abstract provided.
Cee & Uwrl Research In Action, Utah Water Research Laboratory
Cee & Uwrl Research In Action, Utah Water Research Laboratory
Reports
Introduction: The Department of Civil and Environmental Engineer (CEE) and the Utah Water Research Laboratory (UWRL) have a symbiotic working relationship. The CEE Department provides the pricipal investigators with academic affiliation to the university while the UWRL provides faculty with a strong water research arena. Both the CEE department and the UWRL have been involved in research and problem solving for government agencies and private industry.
High Intensity Land Treatment (Hilt) Practices, John P. Martin, Ronald C. Sims
High Intensity Land Treatment (Hilt) Practices, John P. Martin, Ronald C. Sims
Reports
Land treatment is categorized in the Resource Conservation and Recovery Act of 1976 (RCRA) as one of the land disposal options for managing hazardous waste constituents within the defined treatment zone before such constituents can be transported to surface water, groundwater, or air. Under the authroity of Subtitle C of RCFA, the U.S. Environmental Protection Agency has promulgated regulations governing the treatment and disposal of hazardous wastes in land treatment units (40 CFR, Part 264, Subpart M, July 26, 1982). The objectives of this report were to identify land treatment facilities meeting the defined high intensity land treatment (HILT) criteria, …
Information For Operation Of Water Supply Systems, L. Douglas James, Glen E. Stringham, J. Clair Batty
Information For Operation Of Water Supply Systems, L. Douglas James, Glen E. Stringham, J. Clair Batty
Reports
Introduction: Water requirements increase as more people use more water for domestic purposes. The increase is augmented as technological advances add to the water needs of agriculture and industry. Additional urban landscaping adds further to the demand. Simultaneously, the same forces increase demands for flood control, hydrelectric power, and navigation; and a more urbanized population want more flows preserved for productive natural environments, recreational use, and aesthetic enjoyment. The response over the years to these growing demands on water resources has been to supply increasing amounts of water and greater levels of development for other purposes by building more projects, …
New Point Comfort Lighthouse Mathews, Virginia Site Assessment Plan, C. Scott Hardaway Jr., Donna A. Milligan, Kevin P. O'Brien, Christine A. Wilcox
New Point Comfort Lighthouse Mathews, Virginia Site Assessment Plan, C. Scott Hardaway Jr., Donna A. Milligan, Kevin P. O'Brien, Christine A. Wilcox
Reports
New Point Comfort is located at the southern tip of Mathews County (Figure 1) between Chesapeake and Mobjack Bays. The New Point Comfort Lighthouse itself is on an island (Figure 2) that was once attached to the mainland but is now almost 0.6 miles from the mainland and only 0.33 acres in area above mean low water. Previous studies have highlighted the problems which contribute to the instability of the island. McKay (2003) listed these factors which may allow continued erosion and potential damage up to and including the base of the lighthouse itself: rise in sea level, low base …
Water Management: Partnerships For Future Directions (Research And Testing Education Support Outreach), Mac Mckee
Reports
The UWRL is uniquely positioned to form collaborations with USU departments, other academic institutions and water centers, government, and private sector organizations involved in addressing water issues. The strong and consistent support of the State of Utah illustrates the importance of water and the creation of knowledge to manage water in Utah and the surrounding western states. The scope of projects ranges from multimillion dollar partnerships related to soil and groundwater remediation with national impacts, to small scale projects related to outreach to a specific city or county public sector audience. The UWRL mission, the strategy used to accomplish the …
Three Dimensional Hydrodynamic Modeling Study, Craney Island Eastward Expansion, Lower James River And Elizabeth River, Virginia, Harry V. Wang, S. C. Kim, John D. Boon, A. Y. Kuo, G. M. Sisson, J. M. Brubaker, J. P-Y. Maa
Three Dimensional Hydrodynamic Modeling Study, Craney Island Eastward Expansion, Lower James River And Elizabeth River, Virginia, Harry V. Wang, S. C. Kim, John D. Boon, A. Y. Kuo, G. M. Sisson, J. M. Brubaker, J. P-Y. Maa
Reports
The Craney Island Eastward Expansion Hydrodynamic Model Study was conducted in three phases: 1) model calibration and verification for the Elizabeth River, 2) model testing of four Craney Island expansion options using single variable runs (using a single variable, tidal range, for model input), 3) model testing of two expansion options using historical runs (using multiple variables in real time for model input). The expansion option designs were evaluated for both global and local hydrodynamic change through simulation comparisons with the Base Case condition.
Development Of A Low-Cost, Self-Calibrating Stream Gaging Station, Gilberto Urroz, Robert C. Leines, Garryn L. Perret, Jared M. Holland, Brian E. Hunsaker
Development Of A Low-Cost, Self-Calibrating Stream Gaging Station, Gilberto Urroz, Robert C. Leines, Garryn L. Perret, Jared M. Holland, Brian E. Hunsaker
Reports
Executive Summary: The present report presents a review of the state-of-the-art technologies for the development of a low-cost, self-calibrating stream gaging station. The research was conducted by the Utah Water Research Laboratory with funding provided by the Utah Division of Water Resources through Project RP 110080, March 1998. The report presents a review of the current practices in stream gaging and how technologies such as remote data telemetry through the use of satellite, cellular phone communications, and radio telemetry can be used for the real-time transmission of data. The study also includes the use of Global Positioning System (GPS) for …
Utah Water Research Laboratory Publications Listing 1993-1996, David S. Bowles, Leaunda S. Hemphill
Utah Water Research Laboratory Publications Listing 1993-1996, David S. Bowles, Leaunda S. Hemphill
Reports
No abstract provided.
The Study Of The Resistance And Stability Of Vegetation Ecosystem Plant Groupings In Flood Control Channels: Vol. 1, William Rahmeyer, David Werth
The Study Of The Resistance And Stability Of Vegetation Ecosystem Plant Groupings In Flood Control Channels: Vol. 1, William Rahmeyer, David Werth
Reports
Preface: The following report was prepared by the utah Water Research Laboratory of Utah State University in Logan, Utah. Volume 1 of the UWRL report USU--400A contains the data summary and conclusions of flow tests conducted with different plant types and ecosystem groupings of shrubs and woody vegetation in the hydraulics flumes of Utah State University. The methodology and equations that were developed to predict flow resistance for fultiple plant types include the effects of plant fexibility, varying plant density, plant characteristics, and multiple plant stems. The study included over 214 flow tests, testing of 20 different plant types, 5 …
Cache County Water Demand/Supply Model, Trevor C. Hughes, Gregory J. Norby, Laxman Thyagarajan
Cache County Water Demand/Supply Model, Trevor C. Hughes, Gregory J. Norby, Laxman Thyagarajan
Reports
This report descibes a municipal water demand forecasting model for use in areas of mixed rural and urban housing types. A series of residential demand functions were derived which forecast water demand based on the ype and density of housing and season. Micro sampling techniques were used to correlate water use data and explanatory variable data for low, medium, and high density housing. The demand functions were incorporated into a geographic information system (GIS) platform cosisting of a desk-top mapping program, MapInfo, coupled with a user interface program written in Visual Basic. The GIS-based model analyzes water demand at the …
Proceedings Of The 1995 Annual Symposium On Engineering Geology And Geotechnical Engineering (No. 31), Joseph A. Caliendo
Proceedings Of The 1995 Annual Symposium On Engineering Geology And Geotechnical Engineering (No. 31), Joseph A. Caliendo
Reports
No abstract provided.
Locally Weighted Polynomial Regression: Parameter Choice And Application To Forecasts Of The Great Salt Lake, Upmanu Lall, Young-Ii Moon, Ken Bosworth
Locally Weighted Polynomial Regression: Parameter Choice And Application To Forecasts Of The Great Salt Lake, Upmanu Lall, Young-Ii Moon, Ken Bosworth
Reports
Relationships between hydrologic variables are often nonlinear. Usually the functional form of such a relationship is not known a priori. A multivariate, nonparametric regression methodology is provided here for approximating the underlying regression function using locally veighted polynomials. Locally weighted polynomials consider the approximation of the target function through a Taylor series expansion of the function in the neighborhood of the point of estimate. Cross validatory procedures for the selection of the size of the neighborhood over which this approximation should take place, and for the order of the local polynomial to use are provided and shown for some simple …
In Situ Bioremediation Of Contaminated Unsaturated Subsurface Soils, Joseph L. Sims, R. C. Sims, R. R. Dupont, J. E. Mathews, M. M. Russell
In Situ Bioremediation Of Contaminated Unsaturated Subsurface Soils, Joseph L. Sims, R. C. Sims, R. R. Dupont, J. E. Mathews, M. M. Russell
Reports
An emerging technology for the remediation of unsaturated subsurface soils involves the use of microorganisms to degrade contaminants which are present in such soils. Understanding the processes which drive in situ bioremediation, as well as the effectiveness and efficiency of the utilization of these systems, are issues which have been identified by the Regional Superfund Engineering Forum as concerns of Superfund decision makers.
The Great Salt Lake: A Barometer Of Low Frequency Climate Variability, Upmanu Lall, Michael Mann
The Great Salt Lake: A Barometer Of Low Frequency Climate Variability, Upmanu Lall, Michael Mann
Reports
Low frequency (interannual or longer period) climatic variability is of interest bacause of its sugnificance for the understanding and prediction of protracted climatic anomalies. Closed basin lakes are sensitive to long term climatic fluctuations and integrate out high frequency variability. It is thus natural to examine the records of such lakes to better understand long term climate dynamics. Here we use Singular Spectral Analysis (SSA) and Multi-Taper Spectral Analysis (MTM) to analyze the time series of Great Slat Lake (GSL) monthly volume changes from 1848-1992, and monthly precipitation, temperature and streamflow for nearby stations with 74 or more years of …
Antecedent Moisture Conditions For Utah Local Storm Probable Maximum Floods, Travis S. Taylor, David S. Bowles
Antecedent Moisture Conditions For Utah Local Storm Probable Maximum Floods, Travis S. Taylor, David S. Bowles
Reports
Introduction: The critical inflow design flood for most dams in Utah is the probable maximum flood (PMF) resulting from the local storm probable maximum precipitation (PMP) event. Commonly, the Soil Conservation Service (SCS) curve number method is used to determine the PMF from the local storm PMP. An important factor in this determination is the assumption of antecedent moisture conditions (AMC) existing immediately prior to the onset of the PMP event. At one northern Utah dam site the use of AMC III increased the PMF peak flowrate by 50 percent over the peak obtained when AMC II was used (Win …
A Spatially Distributed Energy Balance Snowmelt Model, David G. Tarboton, Tanveer G. Chowdhury, Thomas H. Jackson
A Spatially Distributed Energy Balance Snowmelt Model, David G. Tarboton, Tanveer G. Chowdhury, Thomas H. Jackson
Reports
This paper describes an energy balance snowmelt model developed for the prediction of rapid snowmelt rates responsible for soil erosion and water input to a distributed water balance model. The model uses a lumped representation of the snowpack with two state variables, namely, water equivalent and energy content relative to a reference state of water in the ice phase at 0 degrees Celcius. This energy content is used to determine snowpack average temperature of liquid fraction. This representation of the snowpack is used to determine snowpack average temperature of liquid fraction. This representation of the snowpack is used in a …
Utah Water Research Laboratory Publications Listing 1989-1994, David S. Bowles, Leaunda S. Hemphill
Utah Water Research Laboratory Publications Listing 1989-1994, David S. Bowles, Leaunda S. Hemphill
Reports
No abstract provided.
Low Frequency Climate Variability: Understanding The Rise And Fall Of The Great Salt Lake, Michael E. Mann, Upmanu Lall, Barry Saltzman
Low Frequency Climate Variability: Understanding The Rise And Fall Of The Great Salt Lake, Michael E. Mann, Upmanu Lall, Barry Saltzman
Reports
Connections between the Great Salt Lake (GSL) volume (V) and large-scale climate variations are developed through an analysis of the time series of the month-to-month differences in V (change in V), local precipitation and streamflow, and gridded U.S. sea level pressure and global temperature data. We isolate decadal and secular mdoes of cliamte variability that are coherent with change in V variations. The decadal variations results from a low-frequency north-south shifting of storm tracks which influence winter precipitation. These variations describe nearly 18% of the interannual variance in change in V, while the secular trend accounts for only ~1.5%. The …
Selecting Controls For Water Distribution Systems, J. Paul Tullis
Selecting Controls For Water Distribution Systems, J. Paul Tullis
Reports
One of the key requirements for reliable operations of a water supply system is a thorough analysis and proper selection of the control valves and pumps. For valves, selection criteria includes capacity, pressure loss, controllability, torque, cavitation and transients. Pump selection requires matching the pump performance to varying system demands. Examples are given for single pump operation and use of pumps in series and parallel. When future demands exceed the original design conditions, or if significant changes are required in the operation of the system, each important control device should be analyzed to see if it can operate safely at …
Measurements And Modeling Of Snow Energy Balance And Sublimation From Snow, David G. Tarboton
Measurements And Modeling Of Snow Energy Balance And Sublimation From Snow, David G. Tarboton
Reports
Snow melt runoff is an important factor in runoff generation for most Utah rivers and a large contributer to Utah's water supply and periodically flooding. The melting of snow is driven by fluxes of energy into the snow during warm periods. These consist of radiant energy from the sun and atmosphere, sensible and latent heat transfers due to turbulent energy exchanges at the snow surface and a relatively small ground flux from below. The turbulent energy exchanges are also responsible for sublimation from the snow surface, particularly in arid environments, and result in a loss of snow water equivalent available …
The Source Hydrology Of Severe Sustained Drought In Th Southwestern U.S., David G. Tarboton
The Source Hydrology Of Severe Sustained Drought In Th Southwestern U.S., David G. Tarboton
Reports
This paper considers the risk of drought and develops drough scenarios for use in the study of severe sustained drought in the Southwestern United States. The focus is on the Colorado River gbasin and regions to which Colorado River water is exported, especially southern California, which depends on water from the Colorado River as well as the four major rivers in northern California. Drought scenarios are developed using estimates of unimpaired historic streamflow as well as reconstructions of streamflow based on tree ring widths. Drought scenarios in the Colorado River are defined on the basis of annual flow at Lees …
The Study Of Resistance And Stability Of Vegetation In Flood Channels, William Rahmeyer, David Werth, Rob Cleere
The Study Of Resistance And Stability Of Vegetation In Flood Channels, William Rahmeyer, David Werth, Rob Cleere
Reports
Preface: The following report was prepared by the Utah Water Research Laboratory of Utah State University in Logan, Utah. The report contains the data and conclusions of flow tests conducted with different types of shrubs and woody vegetation in the hydraulics flumes of Utah State University. The funding agency for this project was the U.S. Army Engineers Waterwasy Experiment Stations, Vicksburg, MS.; Project Name - Flood Control Channels; Work Unit Title - Stability of Vegetative Cover in Flood Control Channels; Work Unit No - 337A3; Federal Contract No - DACW39-94-K-0009. The study was the result of a proposal submitted in …
Computer Methodology For Transportation Agencies To Screen Technologies For Hazardous Waste Remediation, William J. Grenney, Ravi Kumar Penmetsa
Computer Methodology For Transportation Agencies To Screen Technologies For Hazardous Waste Remediation, William J. Grenney, Ravi Kumar Penmetsa
Reports
Executive Summary: Many pathways exist for transportation agencies and other public and private agencies to become responsible for sites contaminated by hazardous wastes. As a reult, agencies frequently face a multitude of lega, regulatory, financial, technical, and health risk problems. When transportation agencies become involved in the remediation of hazardous waste sites, the common practice is to hire consultants and contractors for the clean up process. Because the field of hazardous waste site remediation is changing so rapidly, agency personnel evaluating the consultant's recommendations need to ahve access to the most recent regulatory and remediation information. Early stages of the …
Effectiveness Determination Of Two Different Water-Saving Devices For Toilet Tanks, C. Earl Israelsen, Gilberto Urroz
Effectiveness Determination Of Two Different Water-Saving Devices For Toilet Tanks, C. Earl Israelsen, Gilberto Urroz
Reports
Introduction: The project was successful in obtaining eight different brands of new toilet tanks in the 3.5 gals-per-flish-bariety, and two used ones requiring 5.0 gals per flish. The tanks were installed on a t atime on a padded stell frame and connected to a water supply. The float was adjusted to maintain the water in the tank at the level recommended by the manufacturer. When the flush and shut-off mechanisms were adjusted properly, the testing begain.
Interpretation Of Drill Log Data: Dlog3d - A Probabilistic Tool For Analyzing Subsurface Soil Variability, Alaa El-Din Ali, Upmanu Lall
Interpretation Of Drill Log Data: Dlog3d - A Probabilistic Tool For Analyzing Subsurface Soil Variability, Alaa El-Din Ali, Upmanu Lall
Reports
Groundwater contamination potential is directly related to the location of zones of high hydraulic conductivity. Sedimentary depositional environments can be quite complex. Pockets of sand of varying thickness and orientation may be scattered over the aquifer. A contaminant pathway can esist where these pockets or lenses are interconnected. Aquifer pump tests do not provide useful information on the occurrence of such lenses. Drill log data directly sample the soil, but may represent very local sections of the aquifer, and are of relatively poor quality. Here we present a methodology (DLOG3D) that allows a probabilistic interpretation of drill log data that …
Development Of Mountain Climate Generator And Snowpack Model For Erosion Predictions In The Western United States Using Wepp: Phase Iv, David S. Bowles, U. Lall, D. G. Tarboton, E. Malek, B. Rajagopalan, T. Chowdhury, E. Kluzak
Development Of Mountain Climate Generator And Snowpack Model For Erosion Predictions In The Western United States Using Wepp: Phase Iv, David S. Bowles, U. Lall, D. G. Tarboton, E. Malek, B. Rajagopalan, T. Chowdhury, E. Kluzak
Reports
Executive Summary: Introduction: This report summarizes work conducted during the funding period (December 1, 1991 through September 30, 1992) of a Research Joint Venture Agreement between the Intermountain Research Station, Forest Service, U. S. Department of Agriculture and the Utah Water Research Laboratory (UWRL), Utah State University (USU). The purpose of the agreement is to develop a Western Mountain Cilmate Generator (MCLIGEN) similar in function to the existing (non-orographic area) Climate Generator (CLIGEN), which is part of the Water Erosion Prediciton Project (WEPP) procedure. Aso, we are developing a Western U.S. Snowpack Simulation Model for includsion in WEPP. In the …
A Prototype Computer Based Tutorial For The Use Of Highway Patrol Radar Guns, William J. Grenney, Thad E. Senti
A Prototype Computer Based Tutorial For The Use Of Highway Patrol Radar Guns, William J. Grenney, Thad E. Senti
Reports
Executive Summary: The software contained in this package, termed POSAT (Police Officer Standards and Training) is the prototype knowledge-base decision support system developed specifically for the Utah State Police Academy. All police officers must be certified annual for the use of radar guns. This self-study computer program is intended to reduce the cost of providing field training for hundreds of police officers each year. By installing the POSAT software at remote locations, polic officers within a certain districut need only to travel to the nearest remote testing sight to take the exam and renew their radar certification. POSAT automatically transmits …
Simulation Of Daily Precipitation From A Nonparametric Renewal Model, Balaji Rajagopalan, Upmanu Lall, David G. Tarboton
Simulation Of Daily Precipitation From A Nonparametric Renewal Model, Balaji Rajagopalan, Upmanu Lall, David G. Tarboton
Reports
Wet/dry spell characteristics of daily precipitation are of interest for a number of hydrologic applications (e.g., flood forecasting or assessment of erosion potential). Here, we examine issues related to designing an appropriate nonparametric scheme that focuses on spell characteristics for resampling historically daily precipitation data. A subset of the nonparametric wet/dry spell model presented in Lall et al (1993) is tested with synthetic data to justify the strategy proposed for applications. An application of the nonparametric wet/dry spell model to a Utah data set follows. Performance is judged on a set of statistical measures. Numerical comparisons of model performance with …