Download or read book Vulnerability of Ground Water to Contamination Northern Bexar County Texas written by Amy Richter Clark and published by . This book was released on 2003 with total page 34 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Vulnerability of Ground Water to Contamination Edwards Aquifer Recharge Zone Bexar County Texas 1998 written by Allan K. Clark and published by . This book was released on 2000 with total page 24 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Vulnerability of Ground Water to Contamination Northern Bexar County Texas U S Geological Survey Water Resources Investigations Report 03 4072 2003 written by Geological Survey (U.S.) and published by . This book was released on 2003* with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Vulnerability of Ground Water to Contamination Northern Bexar County Texas written by Amy Richter Clark and published by . This book was released on 2003 with total page 34 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Vulnerability of Ground Water to Contamination Edwards Aquifer Recharge Zone Bexar County Texas 1998 written by Allan K. Clark and published by . This book was released on 2000 with total page 9 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Groundwater Contamination from Gasoline at Leon Valley Bexar County Texas written by David J. White and published by . This book was released on 1970 with total page 14 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book A Spatial and Statistical Assessment of the Vulnerability of Texas Groundwater to Nitrate Contamination written by Thomas Anders Evans and published by . This book was released on 1995 with total page 280 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Estimation of Groundwater Recharge in Texas Related to Aquifer Vulnerability to Contamination written by Bridget R. Scanlon and published by . This book was released on 2003 with total page 127 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book The Edwards Aquifer written by John M. Sharp Jr. and published by Geological Society of America. This book was released on 2019-11-04 with total page 312 pages. Available in PDF, EPUB and Kindle. Book excerpt: "One of the world's great karstic aquifer systems, the Edwards aquifer system supplies water for more than 2 million people and for agricultural, municipal, industrial, and recreational uses. This volume reviews the current state of knowledge, current and emerging challenges to wise use of the aquifer system, and some technologies that must be adopted to address these challenges"--

Download or read book Assessing the Vulnerability of Public supply Wells to Contamination written by and published by . This book was released on 2011 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Assessing Ground water Vulnerability to Contamination written by Michael J. Focazio and published by . This book was released on 1984 with total page 46 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Ground water Resources of Bexar County Texas written by Texas Water Commission and published by . This book was released on 1947 with total page 468 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Evaluation of Northern Bexar County for Inclusion in the Hill Country Priority Groundwater Management Area written by Sanjeev Kalaswad and published by . This book was released on 2000 with total page 82 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Texas Water Resources written by Dipankar Dwivedi and published by . This book was released on 2013 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Numerical models of flow and transport are commonly applied for the sustainable management of water resources and for the selection of appropriate remediation techniques. However, these numerical models are not always accurate due to uncertain parameters and the disparity of scales across which observations are made, hydrological processes occur, and modeling is conducted. The modeling framework becomes further complex because hydrologic processes are coupled with chemical and biological processes. This dissertation focuses on the most widespread contaminants of surface and ground water, which are E. coli and nitrate, respectively. Therefore, this research investigates the linkages between bio-chemical and hydrologic processes for E. coli transport, explores the spatio-temporal variability of nitrate, quantifies uncertainty, and develops models for both E. coli and nitrate transport that better characterize these biogeochemical linkages. A probabilistic framework in the form of Bayesian Neural Networks (BNN) was used to estimate E. coli loads in surface streams and was compared with a conventional model LOADEST. This probabilistic framework is crucial when water quality data are scarce, and most models require a large number of mechanistic parameters to estimate E. coli concentrations. Results indicate that BNN provides better characterization of E. coli at higher loadings. Results also provide the physical, chemical, and biological factors that are critical in the estimation of E. coli concentrations in Plum Creek, Texas. To explore model parameters that control the transport of E. coli in the groundwater (GW) and surface water systems, research was conducted in Lake Granbury, Texas. Results highlight the importance of flow regimes and seasonal variability on E. coli transport. To explore the spatio-temporal variability of nitrate across the Trinity and Ogallala aquifers in Texas, an entropy-based method and a numerical study were employed. Results indicate that the overall mean nitrate-N has declined from 1940 to 2008 in the Trinity Aquifer as opposed to an increase in the Ogallala Aquifer. The numerical study results demonstrate the effect of different factors like GW pumping, flow parameters, hydrogeology of the site at multiple spatial scales. To quantify the uncertainty of nitrate transport in GW, an ensemble Kalman filter was used in combination with the MODFLOW-MT3DMS models. Results indicate that the EnKF notably improves the estimation of nitrate-N concentrations in GW. A conceptual modeling framework with deterministic physical processes and stochastic bio-chemical processes was devised to independently model E. coli and nitrate transport in the subsurface. Results indicate that model structural uncertainty provides useful insights to modeling E. coli and nitrate transport. The electronic version of this dissertation is accessible from http://hdl.handle.net/1969.1/148125

Download or read book Assessing Ground water Vulnerability to Contamination written by Michael J. Focazio and published by . This book was released on 2002 with total page 33 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Assessing Ground water Vulnerability to Contamination written by Michael J. Focazio and published by . This book was released on 2002 with total page 44 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Caves and Karst Across Time written by Yongli Gao and published by Geological Society of America. This book was released on 2016-01-28 with total page 318 pages. Available in PDF, EPUB and Kindle. Book excerpt: "Knowledge and understanding of cave and karst systems have evolved dramatically since the creation of the Geological Society of America in 1888. This book, which came out of a session during GSA's 2013 Annual Meeting, highlights the changes in the study and application of cave and karst systems since GSA's origin, while looking ahead to future advancements"--