Anthropogenic Impacts On Recharge Processes And Water Quality In Basin Aquifers Of The Desert Southwest PDF Download
Are you looking for read ebook online? Search for your book and save it on your Kindle device, PC, phones or tablets. Download Anthropogenic Impacts On Recharge Processes And Water Quality In Basin Aquifers Of The Desert Southwest PDF full book. Access full book title Anthropogenic Impacts On Recharge Processes And Water Quality In Basin Aquifers Of The Desert Southwest.
Author | : Wendy Marie Robertson |
Publisher | : |
Total Pages | : 0 |
Release | : 2014 |
Genre | : |
ISBN | : |
Download Anthropogenic Impacts on Recharge Processes and Water Quality in Basin Aquifers of the Desert Southwest Book in PDF, ePub and Kindle
The development of natural grass/scrubland for agricultural use within the Trans-Pecos basins has altered recharge mechanisms and raised questions about groundwater sustainability. Past efforts focused on recharge in arid basin systems used three main assumptions: there is minimal modern recharge, no widespread recharge on basin floors, and no recharge from anthropogenic sources. However, in the Trans-Pecos, nitrate (NO3−) concentrations have increased in basin groundwater (up by 3-4 mg/l as NO3− in 40 yrs), refuting the "classic" model and posing water quality risks. Grazing and irrigated agriculture have impacted basin hydrology by altering vegetation regime and the magnitude and spatial distribution of infiltration. This has increased recharge, Cl-, and mobile N flux to basin groundwater. A series of spatially-distributed net infiltration models were used to estimate potential recharge from natural and anthropogenic sources. Between 7-20% of potential recharge results from widespread recharge on the basin floors. Additionally, from 1960-2000, irrigation return flow may have contributed 3.0 9 107 - 6.3 9 107 m3 of recharge. These results are supported by field observations. Cores collected beneath agricultural land document changes in water content and pore water chemistry that imply increased downward flux of moisture and solute, and NO3− and Cl- inventories beneath irrigated land are distinct in amount and profile from those in natural areas. There are significant implications for sustainability based upon the trends in groundwater NO3− concentrations, core results, and net infiltration models: more recharge may enter the basins than previously estimated and there is a potential long-term concern for water quality. Due to thick unsaturated zones in the basins, long travel times are anticipated. It is unknown if NO3− and Cl- flux has peaked or if effects will continue for years to come. Further study should be undertaken to examine anthropogenic impacts on basin water quality. Additionally, these impacts may occur in similar systems globally and there is considerable evidence for the re-evaluation of the validity of the "classic" model of recharge in arid basin systems. Future studies and management plans should incorporate potential impacts of changes in vegetation and land use on recharge processes and water budgets in arid basins.
Author | : |
Publisher | : |
Total Pages | : 4 |
Release | : 2000 |
Genre | : Groundwater |
ISBN | : |
Download Desert Basins of the Southwest Book in PDF, ePub and Kindle
Author | : U.S. Department of the Interior |
Publisher | : |
Total Pages | : 98 |
Release | : 2014-10-09 |
Genre | : Nature |
ISBN | : 9781502525536 |
Download Effects of Natural and Human Factors on Groundwater Quality of Basin-fill Aquifers in the Southwestern United States Book in PDF, ePub and Kindle
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 | : Andrea Aikin |
Publisher | : |
Total Pages | : 64 |
Release | : 1987 |
Genre | : Artificial groundwater recharge |
ISBN | : |
Download Geochemical Assessment of Aquifer Recharge Effects in the Southwest Denver Region Book in PDF, ePub and Kindle
Author | : Robert G. Maliva |
Publisher | : Springer |
Total Pages | : 861 |
Release | : 2019-05-07 |
Genre | : Science |
ISBN | : 3030110842 |
Download Anthropogenic Aquifer Recharge Book in PDF, ePub and Kindle
The book is an overview of the diversity of anthropogenic aquifer recharge (AAR) techniques that use aquifers to store and treat water. It focusses on the processes and the hydrogeological and geochemical factors that affect their performance. This book is written from an applied perspective with a focus of taking advantage of global historical experiences, both positive and negative, as a guide to future implementation. Most AAR techniques are now mature technologies in that they have been employed for some time, their scientific background is well understood, and their initial operational challenges and associated solutions have been identified. However, opportunities exist for improved implementation and some recently employed and potential future innovations are presented. AAR which includes managed aquifer recharge (MAR) is a very important area of water resources management and there is no recent books that specifically and comprehensively addresses the subject.
Author | : A. D. Konieczki |
Publisher | : DIANE Publishing |
Total Pages | : 44 |
Release | : 2004 |
Genre | : Government publications |
ISBN | : |
Download Water-use Trends in the Desert Southwest, 1950-2000 Book in PDF, ePub and Kindle
Author | : Thomas Warren Anderson |
Publisher | : |
Total Pages | : 44 |
Release | : 1995 |
Genre | : Aquifers |
ISBN | : |
Download Summary of the Southwest Alluvial Basins, Regional Aquifer-system Analysis, South-central Arizona and Parts of Adjacent States Book in PDF, ePub and Kindle
Author | : W. F. Hardt |
Publisher | : |
Total Pages | : 84 |
Release | : 1987 |
Genre | : Aquifers |
ISBN | : |
Download Aquifer Response to Recharge and Pumping, San Bernardino Ground-water Basin, California Book in PDF, ePub and Kindle
Author | : Andrea Aikin |
Publisher | : |
Total Pages | : 41 |
Release | : 1989 |
Genre | : Artificial groundwater recharge |
ISBN | : |
Download Geochemical Assessment of Aquifer Recharge Effects in the Southwest Denver Basin Book in PDF, ePub and Kindle
Author | : Alissa L. Coes |
Publisher | : |
Total Pages | : 70 |
Release | : 2000 |
Genre | : Groundwater |
ISBN | : |
Download Ground-water Quality in the Upper Santa Cruz Basin, Arizona, 1998 Book in PDF, ePub and Kindle