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Book Numerical Modeling and Hydrologic Analysis of Floodplain Hydrogeology Bank Storage Interactions and Underflow in the Colorado River Alluvial Aquifer

Download or read book Numerical Modeling and Hydrologic Analysis of Floodplain Hydrogeology Bank Storage Interactions and Underflow in the Colorado River Alluvial Aquifer written by Barry J. Hibbs and published by . This book was released on 1993 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: A comprehensive hydrogeological investigation was conducted within the Colorado River alluvial aquifer of south-central Texas. The study characterized bank storage interactions caused by irrigation and flood releases from the Highland Lake Reservoirs above Austin, and evaluated the underflow criterion for managing water resources in the Colorado River Basin. The hydrodynamics of the bank storage effect were studied in an integrated tracer and modeling investigation. Variations in dissolved solids between Colorado River water and ground-water created ideal conditions for analysis of stream/aquifer interaction during natural and artificial floodwaves. Two sites were instrumented with observation well and stream-stage recorders. At each site, head, temperature, and chemical data were collected during low-flow, mid-flow, and peak-flow conditions. Significant variations in stream stage and reversals of hydraulic gradient in the adjoining alluvial aquifer were created by releases of water from upstream reservoirs both in response to storm events and for irrigation by downstream users. Aquifer head responded relatively rapidly to changing stream stage during controlled reservoir releases, but tracer (both solute and heat) breakthrough curves were generally not observed even for observation wells very close to the Colorado River. The water table response lagged behind the average head response in the observation wells. These results are postulated to occur as a result of elastic head response in the shallow, unconfined aquifer to rapid changes in stream stage, analogous to the delayed yield effect in an unconfined aquifer during the early stages of pumping. The coupled-process numerical model HST3D was used to develop confined and unconfined aquifer models to simulate the stream/aquifer response. Although the aquifer is clearly recognizable as an unconfined aquifer, the confined aquifer model gave a superior simulation. Both modeling and field data support the hypothesis of elastic head recovery response in the unconfined aquifer. The underflow criterion was evaluated as a legal provision to prevent stream depletion of the Colorado River by high capacity alluvial wells. Study results indicate that the Colorado River alluvial aquifer is not an underflow-dominated system. Even so, site-specific investigations showed that temporally varying underflow zones sometimes exist very close to the river. In more than 90% of the floodplain, data are not available to identify these zones. Beyond the underflow zones, the hydraulic connection between the Colorado River and the alluvial aquifer may extend thousands of feet into the floodplain. Therefore, the potential for stream depletion by wells distant from the underflow zone(s) is great. Study results suggest that the underflow criterion will not be effective as a provision to prevent stream depletion of the Colorado River as the floodplain undergoes agricultural and urban development.

Book Water resources Investigations Report

Download or read book Water resources Investigations Report written by and published by . This book was released on 1999 with total page 168 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Book Selected Water Resources Abstracts

Download or read book Selected Water Resources Abstracts written by and published by . This book was released on 1991 with total page 884 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Book Introduction to Aquifer Analysis

Download or read book Introduction to Aquifer Analysis written by Michael Kasenow and published by Water Resources Publication. This book was released on 1997 with total page 500 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Book A Selected Annotated Bibliography on the Analysis of Water Resource Systems

Download or read book A Selected Annotated Bibliography on the Analysis of Water Resource Systems written by Water Resources Scientific Information Center and published by . This book was released on 1974 with total page 424 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Book Streamflow depletion by wells

Download or read book Streamflow depletion by wells written by Paul M. Barlow and published by . This book was released on 2012 with total page 84 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Book Improved Numerical Methods for Modeling River Aquifer Interaction

Download or read book Improved Numerical Methods for Modeling River Aquifer Interaction written by and published by . This book was released on 2008 with total page 51 pages. Available in PDF, EPUB and Kindle. Book excerpt: A new option for Local Time-Stepping (LTS) was developed to use in conjunction with the multiple-refined-area grid capability of the U.S. Geological Survey's (USGS) groundwater modeling program, MODFLOW-LGR (MF-LGR). The LTS option allows each local, refined-area grid to simulate multiple stress periods within each stress period of a coarser, regional grid. This option is an alternative to the current method of MF-LGR whereby the refined grids are required to have the same stress period and time-step structure as the coarse grid. The MF-LGR method for simulating multiple-refined grids essentially defines each grid as a complete model, then for each coarse grid time-step, iteratively runs each model until the head and flux changes at the interfacing boundaries of the models are less than some specified tolerances. Use of the LTS option is illustrated in two hypothetical test cases consisting of a dual well pumping system and a hydraulically connected stream-aquifer system, and one field application. Each of the hypothetical test cases was simulated with multiple scenarios including an LTS scenario, which combined a monthly stress period for a coarse grid model with a daily stress period for a refined grid model. The other scenarios simulated various combinations of grid spacing and temporal refinement using standard MODFLOW model constructs. The field application simulated an irrigated corridor along the Lower Rio Grande River in New Mexico, with refinement of a small agricultural area in the irrigated corridor. The results from the LTS scenarios for the hypothetical test cases closely replicated the results from the true scenarios in the refined areas of interest. The head errors of the LTS scenarios were much smaller than from the other scenarios in relation to the true solution, and the run times for the LTS models were three to six times faster than the true models for the dual well and stream-aquifer test cases, respectively. The results of the field application show that better estimates of daily stream leakage can be made with the LTS simulation, thereby improving the efficiency of daily operations for an agricultural irrigation system. ACKNOWLEDGEMENTSThe authors appreciatively acknowledge support for Sue Tillery provided by Sandia National Laboratories' through a Campus Executive Laboratory Directed Research and Development (LDRD) research project. Funding for this study was provided by %3C???. S. Tillery is funded by Sandia National Laboratories' through an Excellence in Engineering Fellowship Laboratory> Directed Research and Development (LDRD) research project.

Book Groundwater surface Water Interaction

Download or read book Groundwater surface Water Interaction written by Corinna Abesser and published by . This book was released on 2008 with total page 228 pages. Available in PDF, EPUB and Kindle. Book excerpt: Selected papers from a symposium on A new Focus on Integrated Analysis of Groundwater-Surface Water Systems, held during the International Union of Geodesy and Geophysics XXIV General Assembly in Perugia, Italy, 11-13 July 2007.

Book Water Resource Modeling and Computational Technologies

Download or read book Water Resource Modeling and Computational Technologies written by Mohammad Zakwan and published by Elsevier. This book was released on 2022-10-22 with total page 722 pages. Available in PDF, EPUB and Kindle. Book excerpt: Water Resource Modeling and Computational Technologies, Seventh Edition provides the reader with a comprehensive overview of the applications that computational techniques have in various sectors of water resource engineering. The book explores applications of recent modeling and computational techniques in various sectors of water resource engineering, including hydroinformatics, irrigation engineering, climate change, hydrologic forecasting, floods, droughts, image processing, GIS, water quality, aquifer mapping, basin scale modeling, computational fluid dynamics, numerical modeling of surges and groundwater flow, river engineering, optimal reservoir operation, multipurpose projects, and water resource management. As such, this is a must read for hydrologists, civil engineers and water resource managers. - Presents contributed chapters from global experts in the field of water resources from both a science and engineering perspective - Includes case studies throughout, providing readers with an opportunity to understand how case specific challenges can help with computational techniques - Provides basic concepts as well as a literature review on the application of computational techniques in various sectors of water resources

Book The Handbook of Groundwater Engineering Third Edition

Download or read book The Handbook of Groundwater Engineering Third Edition written by John H. Cushman and published by CRC Press. This book was released on 2016-11-25 with total page 1726 pages. Available in PDF, EPUB and Kindle. Book excerpt: This new edition adds several new chapters and is thoroughly updated to include data on new topics such as hydraulic fracturing, CO2 sequestration, sustainable groundwater management, and more. Providing a complete treatment of the theory and practice of groundwater engineering, this new handbook also presents a current and detailed review of how to model the flow of water and the transport of contaminants both in the unsaturated and saturated zones, covers the protection of groundwater, and the remediation of contaminated groundwater.

Book Heat as a Tool for Studying the Movement of Ground Water Near Streams

Download or read book Heat as a Tool for Studying the Movement of Ground Water Near Streams written by David Arthur Stonestrom and published by . This book was released on 2003 with total page 108 pages. Available in PDF, EPUB and Kindle. Book excerpt: