HYDROGEOLOGY: THE DEMAND FOR WATER Austin-San Antonio continued from p.9
Recent modeling supports this conclusion. Extreme care must be taken in selecting appropriate pumps with wide ranges in pumping rate over wide ranges in head (i.e., head-capacity curves). Additionally, detailed and real-time monitoring and controls are needed to continually optimize reliable production from wells and well fields. With continued increases in demand over the next few decades, importation of water from large regional groundwater and surface water sources will certainly also be viable. Additionally, the Middle Trinity aquifer will provide substantial amounts of water while at the same time waters from the Lower Trinity aquifer may provide a suitable groundwater reservoir for desalination and ASR projects.
References
1. South Central Texas Regional Water Planning Group, 2015, 2016 South Central Texas Regional Water Plan, Volume 1 – Executive Summary and Regional Water Plan, Prepared by South Central Texas Regional Water Planning Group, with administration by San Antonio River Authority, with technical assistance by HDR Engineering, Inc. and Ximenes and Associates.
2. Clark, A.K., Golab, J.A., and Morris, R.R., 2016, Geological Framework and Hydro-stratigraphy of the Edwards and Trinity Aquifers within Northern Bexar and Comal Counties, Texas, U.S. Geological Survey Scientific Investigations Map 3366, Prepared in Cooperation with the Edwards Aquifer Authority, 20 p.
3. Ashworth, J.B., 1983, Ground-Water Availability of the Lower Cretaceous Formations in the Hill Country of South-Central Texas: Texas Department of Water Resources Report No. 273, 172 p.
4. Brune, Gunnar and Duffin, Gail L., 1893, Occurrence, Availability, and Quality of Ground Water in Travis County, Texas: Texas Department of Water Resources Report No. 276, 231 p.
5. Clark, Allan K., 2003, Geologic Framework and Hydrogeologic Features of the Glen Rose Limestone, Camp Bullis Training Site, Bexar County, Texas: U.S. Geological Survey Water-Resources Investigations Report 03-4081, in Cooperation with the U.S. Army, 9 p.
6. Jones, Ian C., Anaya, Roberto, and Wade, Shirley C., 2011, Groundwater Availability Model: Hill Country Portion of the Trinity Aquifer of Texas: Texas Water Development Board Report No. 377, 165 p.
7. Beach, James, and Konetchy, Brant, 2019, Groundwater Level Decline Estimates in Trinity Aquifer: Technical Memorandum Prepared for the Trinity Glen Rose Groundwater Conservation District, 84 p.
About the Authors
Raul A. Deju (CPG 4025) received his Ph.D. in Hydrology from New Mexico Tech and serves as Partner in Brightstar Capital Partners and Chair of Texas Water Supply Company. He is the author of the book “Regional Hydrology Fundamentals” and six other books and the recipient of numerous awards as well as being recognized for his charitable work.
Mike Thornhill (CPG-9545) a Professional Geoscientist licensed by the State of Texas with more than 30 years consulting experience, has provided professional consulting services for many projects across Texas as well as several other states, including projects within all the major and most of the minor aquifers of Texas. Since establishing Thornhill Group, Inc, a professional firm specializing in hydrogeology and water resources, Mike has conducted and supervised investiga- tions for developing groundwater supplies ranging from tens of gal- lons per minute to more than 100 million gallons per day; assisted numerous project engineers with well and well field design; directed projects involving well evaluation and rehabilitation; and provided expert witness services in some of the most high profile groundwater cases in Texas.
For more hydrogeology-related peer reviewed articles, go to page 50 of this edition of the TPG.
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Pay online at AIPG’s newly re-designed website at or via mail. Dues payments are required to remain a member in good standing. Your dues are important to helping the organization promote the profession of geology, support outreach efforts, and fund student scholarships that are amongst the many benefits of membership.
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www.aipg.org Lakeland Wellfield continued from p. 18
Tetra Tech, Consultant’s report, 2010. Plan for restoration of wetland hydrology at Lakeland NE wellfield.
Tetra Tech, Consultant’s report, 2011. Plan for tree removal and recontouring at Lakeland NE wellfield.
United States Department of Agriculture, Natural Resources Conservation Service. Web soil survey.
https://websoilsurvey.nrcs.
usda.gov/app/WebSoilSurvey.aspx
About the Authors
Charles Drake, Chuck is 6th generation native of Orlando/ Orange County who’s great-great-grandfather was Orange County’s first elected sheriff around 1860. He is a Florida licensed professional geologist (# 37) and obtained his B.S. in Geology from the University of Florida and has 36 years of experience in hydrogeology, water resources and water supply planning. His expertise is in groundwater resource evaluations for water supply, water supply master plans; wellfield design, permitting and construction, aquifer performance tests; groundwater flow modeling and water use permitting for many municipal government utilities throughout Florida.
He is active in the Florida Association of Professional Geologists, the American Institute of Professional Geologists, and as a trustee of the Florida Section of the WateReuse Association.
Bruce LaFrenz, MEM-2035. “I am a Professional Geologist licensed in Florida and Georgia. My practice areas include modeling of groundwater flow and solute transport in support of water resources exploration and development, permitting, wellfield design, and con- tamination assessment and abatement.
I have provided expert testimony in the areas of geology, hydrogeology, groundwater flow and transport modeling, (Florida) water use permitting, aquifer test design and analysis, and mineral resources assessment.
Dr. W. Michael Dennis is President and a Senior Scientist of Breedlove, Dennis & Associates, Inc., a natural resources-based environmental consulting firm which has offices in Orlando and Brooksville, Florida, where he consults on wetland evaluations, wetland mitigation, plant taxonomy and ecology, remote sensing and aerial photointerpretation, wildlife including Threatened and/or Endangered species, wetland permitting issues, Ordinary High Water Line determinations, and terrestrial and wetlands ecology. He serves as an expert witness on these issues, testifying in administrative, state, and federal jurisdictions. Dr. Dennis has also served on state environ- mental advisory/technical panels and advised the Florida Senate and House on wetland regulations. Dr. Dennis received a B.S. in Biology from Emory University, a M.S. in Biology from the University of South Carolina, and a Ph.D. in Botany from the University of Tennessee.
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