UNT Libraries Government Documents Department - 91 Matching Results
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- Compilation of Results of Aquifer Tests in Texas
- "The mission of the Texas Water Development Board's (TWDB) Groundwater Resources Division is to collect, interpret, and provide accurate, objective information on the groundwater resources of Texas. In support of this mission, the TWDB has undertaken a long-term process of mapping and characterizing the aquifers of Texas."
- Pecos Valley Aquifer, West Texas: Structure and Brackish Groundwater
- "The pilot study has helped lay the foundation for future Brackish Resources Aquifer Characterization System projects by developing a database management system in which variety of data can be stored and processed."
- Water Quality in the Blaine Aquifer of Texas
- "The purpose of this report is to describe the water quality of the Blaine Aquifer, particularly as compared with public drinking water standards, and to analyze, if possible, any changes in water quality over time."
- Aquifers of Texas
- "This report is an update to the Texas Water Development Board (TWDB) Report 345, Major and Minor Aquifers of Texas, published in 1995 and coauthored by John B. Ashworth and Janie Hopkins."
- Aquifers of the Upper Coastal Plains of Texas
- A collection of essays providing information about aquifers of the upper coastal plains of Texas.
- Groundwater Availability Model for the Edwards-Trinity (Plateau) and Pecos Valley Aquifers of Texas
- This report describes the study area, previous aquifer investigations, and hydrogeologic setting used to develop the Edwards Trinity and Pecos Valley aquifers conceptual models, and provides details on the study and suggestions for future model improvements.
- The Hydrogeology of Hudspeth County, Texas
- This report provides results from a study on the Hudspeth County area's hydrogeology and immediate, short-term, and long-term water supplies and needs, conducted for the Texas Commission on Environmental Quality.
- Groundwater Availability of the Trinity Aquifer, Hill Country Area, Texas: Numerical Simulations through 2050
- This report describes the construction and calibration of the numerical groundwater flow model and presents results of predictive simulations of water levels for the next 50 years based on projected demands from Regional Water Planning Groups.
- Evaluation of Enhanced Recharge Potential to the Ogallala Aquifer in the Brazos River Basin, Hale County, Texas
- This study evaluates groundwater recharge from Soil Conservation Service (SCS) (currently the Natural Resources Conservation Service) reservoirs to determine whether recharge could be enhanced by increasing storage capacity or by modifying the bottom of the reservoirs.
- Model Refinement and Applications for the Edwards (Balcones Fault Zone) Aquifer in the San Antonio Region, Texas
- This report provides information on the project to reevaluate the Texas Water Development Board's existing Edwards aquifer flow model and refine the simulation of water levels and springflows in the San Antonio region.
- Changes in Groundwater Conditions in the Edwards and Trinity Aquifers, 1987-1997, for Portions of Bastrop, Bell, Burnet, Lee, Milam, Travis, and Williamson Counties, Texas
- The purpose of this report is to update the Texas Water Development Board's Report 326, addressing groundwater problems in the study area related to unreliable supplies during short-term drought demands and long-term economic development.
- Groundwater Availability Model: Hill Country Portion of the Trinity Aquifer of Texas
- This report describes updates to the earlier developed groundwater availability model for the Hill Country portion of the Trinity Aquifer System, "by (1) adding the Lower Trinity Aquifer as another layer to the model, (2) revising the spatial distribution of parameters, such as recharge and pumping, and (3) calibrating the steady-state water level and river discharge conditions for 1980 and historical transient water level and discharge conditions for 1987 through 1997" (p. 1).
- Changes in Water Levels in Texas, 1995 to 2005
- This report examines the median water level changes in the state's major and minor aquifers, and describes where the largest declines and increases were within an aquifer and presents regional trends.
- Irrigation Metering and Water Use Estimates: A Comparative Analysis, 1999-2007
- This report analyzes data on irrigation water use by crop type collected from 1999-2007 in the Panhandle, North Plain, Mesa, Hudspeth, Gateway, Rolling Plains, Coastal Bend, and High Plains groundwater conservation districts and the Lower Neches Valley Authority.
- Please Pass the Salt: Using Oil Fields for the Disposal of Concentrate from Desalination Plants
- The purpose of this report is to show that oil and gas fields can physically and chemically accept concentrate from desalination plants, and to recommend changes to statute and rules that would allow the disposal of concentrate in oil and gas fields.
- Groundwater-Surface Water Interaction in the Brazos River Basin: Evidence from Lake Connection History and Chemical and Isotopic Compositions
- This report describes study methods used in determining the sources of the water in oxbow lakes along the Brazos River, characteristics of the Brazos River and oxbow lakes, and the hydrogeologic setting that hydraulically connects the aquifer, river, and lakes.
- Reconnaissance of the Chemical Quality of Surface Waters of the Nueces River Basin, Texas
- Report on a survey of minerals and other chemicals, "to present available chemical-quality data and interpretations that will aid in the proper development, management, and use of the surface-water resources of the Nueces River basin. In the study, the following factors were considered: the nature and concentrations of mineral constituents in solution; the geologic hydrologic, and cultural influences that determine the water quality; and the suitability of the water for domestic supply, industrial use, and irrigation" (p. 2).
- Reconnaissance of the Oxygen Balance and the Variation of Selected Nutrients in the San Antonio River During Low Flow
- Report on the results of a water-quality evaluation of the San Antonio River "to describe the progress of waste assimilation, to delineate the critical reach of the river (the reach in which the minimum dissolved-oxygen concentration occurs), and to determine the concentrations of selected nutrients in the river during the low-flow period June 16-19, 1969" (p. 1).
- Occurrence and Quality of Ground Water in Throckmorton County, Texas
- Report on the quality and availability of ground water in Throckmorton County. The quality of the water varies widely, in part because oil operations have injected salt water back into the subsurface.
- Relation of Ponded Floodwater from Hurricane Beulah to Ground Water in Kleberg, Kenedy, and Willacy Counties, Texas
- Report on how ponded floodwater from Hurricane Beulah affected the groundwater in Kleberg, Kenedy, and Willacy Counties, Texas.
- Ground-Water Resources of Fort Bend County, Texas
- Report on groundwater resources in Fort Bend County, Texas.
- Ground-Water Resources of Montgomery County, Texas
- Report on the ground water in Montgomery County contained in sands of the Catahoula Standstone, lower part of the Jasper aquifer, Burkeville aquiclude, Evangeline aquifer, and Chicot aquifer.
- Reconnaissance of the Chemical Quality of Surface Waters of the Red River Basin, Texas
- Report on the Red River, with data on its area, topography, climate, rainfall, chemical quality, and degradation of the water supply.
- Selected Water-Quality Records for Texas Surface Waters, 1970 Water Year: Biochemical-Oxygen-Demand, Dissolved-Oxygen, Nutrients, Pesticides, Minor-Elements, and Other Related Chemical Analyses
- Report on water-quality of Texas surface waters for 1970.
- Chemical and Physical Characteristics of Water in Estuaries of Texas: September 1967-September 1968
- Report studying the water estuaries of Texas to properly manage and utilize these resources. Contains maps, data-collection methods, tables, and more.
- Chemical and Physical Characteristics of Water in Estuaries of Texas: October 1968-September 1969
- Report studying the water estuaries of Texas to properly manage and utilize these resources. Contains maps, data-collection methods, tables, and more.
- Water-Level Data from Observation Wells in the Southern High Plains of Texas 1965-70
- Report
- Water-Level Data from Observation Wells in the Northern Panhandle of Texas
- Report on water level data from observation wells in the Northern Panhandle of Texas and discussion of the available groundwater resources and how irrigation has reduced supplies.
- Ground-Water Resources of Collingsworth County, Texas
- Report on groundwater resources in Collingsworth County, Texas.
- Ground-Water Resources of Aransas County, Texas
- Report on groundwater resources in Aransas County, Texas, providing an overview of the available resources, geology of the area, and quality.
- Ground-Water Resources of Cass and Marion Counties, Texas
- Report on groundwater resources in Cass and Marion Counties, Texas.
- An Investigation of Clouds and Precipitation for the Texas High Plains
- Report on cloud types and their frequency, types of precipitation creation, and the potential for artificial cloud seeding on the Texas High Plains.
- Ground-Water Resources of Chambers and Jefferson Counties, Texas
- Report on groundwater resources in Chambers and Jefferson Counties, Texas including current and potential sources of groundwater and water quality reports.
- Records of Wells, Drillers' Logs, Water-Level Measurements and, Chemical Analyses of Ground Water in Harris and Galveston Counties, Texas, 1980-84
- This report presents the results of the hydrologic data collection on new large-capacity and other selected wells, including well location and completion data, drillers' logs of the strata penetrated, water levels, and chemical quality of the produced water.
- Evaluation of Water Resources of Orange and Eastern Jefferson Counties, Texas
- The report describes the evaluation of water resources in Orange and Eastern Jefferson counties in response to the 1985 passage of House Bill 2 by the 69th Texas Legislature, which called for the identification of study areas in the state that are expected to experience Critical Underground problems.
- Analytical Study of the Ogallala Aquifer in Bailey County, Texas: Projections of Saturated Thickness, Volume of Water in Storage, Pumpage Rates, Pumping Lifts, and Well Yields
- Report on the Ogallala Aquifer in Bailey County, Texas including the historic use of the aquifer, the projected water volume, and projections of water availability in the future.
- Evaluation of Water Resources in Part of Central Texas
- Report studying the central Texas region's water resources, with notes that there has been rapid decline and contamination in the area. The aquifer is also being used faster than it can naturally replenish.
- Ground Water Conditions in Texas, 1980-1985
- The report describes the conditions of groundwater in Texas, particularly related to issues of overdraft and quality degradation, and "is intended to present information on the ground-water condition of the State's aquifers and thereby aid local and regional water users in operating their systems and planning to meet future water needs" (p. 1)
- Evaluation of Ground-Water Resources in Dallam County, Texas
- Report evaluating the ground-water resources of Dallam County, Texas. Includes information on the geography of the area, geohydrology, ground-water problems due to water-level declines, projected water demands, the availability of water, and scientific tables.
- Annotated Bibliography of Texas Water Resources Reports of the Texas Water Development Board and United States Geological Survey Through August 1974
- Report presents basic hydrologic investigation and studies related to the development of water resources in Texas and the resulting basic data and interpretive reports written by Texas Water Development Board and the U.S Geological Survey.
- Evaluating the Ground-Water Resources of the High Plains of Texas: Volume 2
- Second volume of a report documenting a study to map the High Plains aquifer and obtain data about various measurements and aspects of the aquifer. This volume provides "supporting basic data including records of wells and county maps depicting well locations, elevation of base of aquifer, elevation of water levels in 1980, and saturated thicknesses in 1980" for the northern third of the study area.
- Chemical and Physical Characteristics of Water in Estuaries of Texas: October 1970-September 1971
- Report studying the water estuaries of Texas to properly manage and utilize these resources. Contains maps, data-collection methods, tables, and more.
- Hydrogeology of Lower Cretaceous Strata Under the Southern High Plains of Texas and New Mexico
- Report detailing the movement of ground water through the aquifers of Texas and New Mexico, with analysis of the ground water quality, their yields, and potential for further development.
- Water Level and Water-Quality Data From Observation Wells in Northeast Texas
- This Report presents quantitative and qualitative information concerning ground water of Texas, from observations in wells of 20 county areas in Northeast Texas by Texas Water Development Board and U.S Geological Survey.
- Analytical Study of the Ogallala Aquifer in Castro County, Texas: Projections of Saturated Thickness, Volume of Water in Storage, Pumpage Rates, Pumping Lifts, and Well Yields
- Report on the Ogallala Aquifer in Castro County, Texas including the historic use of the aquifer, the projected water volume, and projections of water availability in the future.
- Ground Water Resources of Part of Central Texas With Emphasis on the Antlers and Travis Peak Formations: Volume 2
- "This report … contains basic data on the occurrence and availability of ground water including well location maps, records of wells, drillers' logs, water levels in wells, and chemical analyses of water" (p. iii).
- Water Quality Records for Selected Reservoirs in Texas, 1972-73 Water Years
- This report contains the results of water-quality surveys of nine reservoirs and chemical analyses of samples collected periodically from 54 reservoirs in Texas.
- Ground-Water Resources of the Antlers and Travis Peak Formations in the Outcrop Area of North-Central Texas
- Report on the ground water resources in an area of north-central Texas, including water production, water level changes, areas for development, and analysis of water use possibilities.
- Analytical Study of the Ogallala Aquifer in Armstrong County, Texas: Projections of Saturated Thickness, Volume of Water in Storage, Pumpage Rates, Pumping Lifts, and Well Yields
- Report on the Ogallala Aquifer in Armstrong County, Texas listing the historic usage, water quality, and water storage.
- Records of Wells, Drillers' Logs, Water-Level Measurements, and Chemical Analysis of Ground Water in Harris and Galveston Counties, Texas, 1970-74
- Report documenting data collected regarding wells in Harris and Galveston Counties, including results of chemical analyses.