Effects of Natural and Human Factors on Groundwater Quality of Basin-fill Aquifers in the Southwestern United States PDF Download
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Author: U.S. Department of the Interior
Publisher:
ISBN: 9781502525536
Category : Nature
Languages : en
Pages : 98
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Book Description
As part of the U.S. Geological Survey National Water- Quality Assessment (NAWQA) Program, the Southwest Principal Aquifers (SWPA) study is building a better understanding of the factors that affect water quality in basin-fill aquifers in the Southwestern United States. The SWPA study area includes four principal aquifers of the United States: the Basin and Range basin-fill aquifers in California, Nevada, Utah, and Arizona; the Rio Grande aquifer system in New Mexico and Colorado; and the California Coastal Basin and Central Valley aquifer systems in California.
Author: U.S. Department of the Interior
Publisher:
ISBN: 9781502525536
Category : Nature
Languages : en
Pages : 98
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Book Description
As part of the U.S. Geological Survey National Water- Quality Assessment (NAWQA) Program, the Southwest Principal Aquifers (SWPA) study is building a better understanding of the factors that affect water quality in basin-fill aquifers in the Southwestern United States. The SWPA study area includes four principal aquifers of the United States: the Basin and Range basin-fill aquifers in California, Nevada, Utah, and Arizona; the Rio Grande aquifer system in New Mexico and Colorado; and the California Coastal Basin and Central Valley aquifer systems in California.
Author:
Publisher:
ISBN:
Category : Groundwater
Languages : en
Pages : 102
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Book Description
Author: Susan A. Thiros
Publisher:
ISBN:
Category : Aquifers
Languages : en
Pages : 288
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Book Description
"The National Water-Quality Assessment (NAWQA) Program of the U.S. Geological Survey has been conducting a regional analysis of water quality in the principal aquifer systems in the southwestern United States (hereinafter, "Southwest") since 2005. Part of the NAWQA Program, the objective of the Southwest Principal Aquifers (SWPA) study is to develop a better understanding of water quality in basin-fill aquifers in the region by synthesizing information from case studies of 15 basins into a common set of important natural and human-related factors found to affect groundwater quality. The synthesis consists of three major components: 1. Summary of current knowledge about the groundwater systems, and the status of, changes in, and influential factors affecting quality of groundwater in basin-fill aquifers in 15 basins previously studied by NAWQA (this report). 2. Development of a conceptual model of the primary natural and human-related factors commonly affecting groundwater quality, thereby building a regional understanding of the susceptibility and vulnerability of basin-fill aquifers to contaminants. 3. Development of statistical models that relate the concentration or occurrence of specific chemical constituents in groundwater to natural and human-related factors linked to the susceptibility and vulnerability of basin-fill aquifers to contamination. Basin-fill aquifers occur in about 200,000 mi2 of the 410,000 mi2 SWPA study area and are the primary source of groundwater supply for cities and agricultural communities. Four of the principal aquifers or aquifer systems of the United States are included in the basin-fill aquifers of the study area: (1) the Basin and Range basin-fill aquifers in California, Nevada, Utah, and Arizona; (2) the Rio Grande aquifer system in New Mexico and Colorado; (3) the California Coastal Basin aquifers; and (4) the Central Valley aquifer system in California. Because of the generally limited availability of surface-water supplies in the arid to semiarid climate, cultural and economic activities in the Southwest are particularly dependent on supplies of good-quality groundwater. Irrigation and public-supply withdrawals from basin-fill aquifers in the study area account for about one quarter of the total withdrawals from all aquifers in the United States. Many factors influence the quality of groundwater in the 15 case-study basins, but some common factors emerge from the basin summaries presented in this report. These factors include the chemical composition of the recharge water, consolidated rock geology and composition of aquifer materials derived from consolidated rock, and land and water use. The major water-quality issues in many of the developed case-study basins are increased concentrations of dissolved solids, nitrate, and VOCs in groundwater as a result of human activities. The information presented and the citations listed in this report serve as a resource for those interested in the groundwater-flow systems in the NAWQA case-study basins. The summaries of water-development history, hydrogeology, conceptual understanding of the groundwater system under both predevelopment and modern conditions, and effects of natural and human-related factors on groundwater quality presented in the sections on each basin also serve as a foundation for the synthesis and modeling phases of the SWPA regional study."--Executive summary.
Author: U.s Department of the Interior
Publisher: CreateSpace
ISBN: 9781497434486
Category : Nature
Languages : en
Pages : 296
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Book Description
The National Water-Quality Assessment Program of the U.S. Geological Survey has been conducting a regional analysis of water quality in the principal aquifer systems in the southwestern United States since 2005.
Author: Stephen J. Grady
Publisher:
ISBN:
Category : Groundwater
Languages : en
Pages : 96
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Book Description
Author: Susan A. Thiros
Publisher:
ISBN: 9781411337565
Category : Groundwater
Languages : en
Pages : 113
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Book Description
Major findings: 1) Contaminants in water from one of every three drinking-water wells sampled are a potential human-health concern. 2) Arsenic and uranium derived from geologic sources are potential drinking-water concerns. 3) Dissolved-solids concentrations in groundwater are increasing in some areas. 4) Artificial recharge and groundwater withdrawals are moving contaminants to deeper parts of basin-fill aquifers.
Author: James F. Hogan
Publisher: American Geophysical Union
ISBN:
Category : Science
Languages : en
Pages : 310
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Book Description
Published by the American Geophysical Union as part of the Water Science and Application Series, Volume 9. Groundwater recharge, the flux of water across the water table, is arguably the most difficult component of the hydrologic cycle to measure. In arid and semiarid regions the problem is exacerbated by extremely small recharge fluxes that are highly variable in space and time. --from the Preface Groundwater Recharge in a Desert Environment: The Southwestern United States speaks to these issues by presenting new interpretations and research after more than two decades of discipline-wide study. Discussions ondeveloping environmental tracers to fingerprint sources and amounts of groundwater at the basin scalethe critical role of vegetation in hydroecological processesnew geophysical methods in quantifying channel rechargeapplying Geographical Information System (GIS) models to land surface processescoupling process-based vadose zone to groundwater modeling, and more make this book a significant resource for hydmlogists, biogeoscientists, and geochemists concerned with water and water-related issues in arid and semiarid regions.
Author: Rodney R. Caldwell
Publisher:
ISBN:
Category : Government publications
Languages : en
Pages : 64
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Book Description
Author: Stephen J. Grady
Publisher:
ISBN:
Category : Groundwater
Languages : en
Pages : 81
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Book Description
Author: J. C. Ebbert
Publisher:
ISBN:
Category : Aquifers
Languages : en
Pages : 78
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Book Description
