Download or read book Groundwater surface Water Interaction in the Brazos River Basin written by and published by . This book was released on 2010 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Numerous oxbow lakes occur along the Brazos River, which stretches over 840 miles across Texas. Created by lateral stream erosion and changes in the course of the river, these lakes were formed when the main stream channels were abandoned. When the oxbow lakes and main channel connect during floods, the water from these surface water bodies mixes, resulting in an exchange of aquatic plant and animal species. These exchanges are important avenues for maintaining biodiversity in a river ecosystem. The main focus of this investigation was to determine the source water of three oxbow lakes near Bryan and Hempstead, Texas. Using site topography and water surface elevation information, we evaluated surface connections of each oxbow lake with the main channel of the river. We estimated recurrence intervals for connections based on historical streamflow and ground survey measurements. Results indicate that Moelhman Slough connects to the Brazos River at least twice per year, Korthauer Bottom connects to the Brazos River more than once per year, and Horseshoe Lake rarely connects to the Brazos River, even during intense flood events. We sampled the three oxbow lakes, river water near the lakes, adjacent groundwater from the shallow alluvial aquifer, and the Queen City, Sparta, and Evangeline aquifers that lie below the alluvium for isotopic and chemical compositions. Isotopic compositions of the alluvial groundwater, river water, and oxbow lake water show a progressive enrichment in oxygen and deuterium isotopes due to their continued evaporation. Groundwater in the alluvial aquifer shows unenriched isotopic values due to an absence of any significant evaporation during recharge. When groundwater from the alluvium discharges as base flow into the river, it mixes with the river water causing enrichment in isotopic values. In the oxbow lakes, higher evaporation occurs because water is locked into shallow, standing bodies of water, which leads to more enriched values. Groundwater from the Queen City, Sparta, and Evangeline aquifers near the lakes has more depleted isotopes and a sodium-bicarbonate composition that differentiates it from the more enriched isotope and calcium-sodium-bicarbonate composition of groundwater from the Brazos River Alluvium Aquifer. These differences in chemical and isotopic compositions suggest that there may not be any significant upward discharges from the Queen City, Sparta, and Evangeline aquifers into the Brazos River Alluvium Aquifer and the Brazos River. Water levels and base flow analyses suggest that a substantial portion of the water in the Brazos River is derived from base flow from the shallow alluvial aquifer. Estimated average base flow discharges are significantly higher downstream than upstream. Fresher (less saline) groundwater composition in the lower parts of the alluvial aquifer produces a fresher river water composition downstream. We estimated recharge into the Brazos River Alluvium Aquifer using base flow and chloride mass balance methods. Using the base flow method, we estimate that average recharge into the aquifer ranges from 0.74 to 0.95 inches per year. Using the chloride mass balance method, we estimate average recharge is about 0.33 inches per year; however, this method may underestimate recharge if chloride is derived from non-precipitation chloride. Water levels in wells and base flow discharges show no direct responses with precipitation amounts, suggesting that recharge into the aquifer is delayed due to the presence of clay in or above the alluvium, as documented by recent geophysical investigations. From a combined use of surface water connections, water chemistry, isotopic composition, and base flow amounts in different segments of the Brazos River, we suggest that the source water for Moehlman Slough and Korthauer Bottom differs from Horseshoe Lake. The frequency and duration of surface connections of the oxbow lakes with the river in combination with characteristic chemical and isotopic compositions suggest that the water in Moelhman Slough and Korthauer Bottom originated during flood events. In contrast, base flow from the alluvial aquifer is the dominant source of water for Horseshoe Lake. Water in Horseshoe Lake has experienced extensive evaporation, which is supported by its enriched deuterium and oxygen isotopic compositions and only one surface connection to the Brazos River over the past 20 years. Although chemical composition of the water from Horseshoe Lake should be more saline due to extensive evaporation, it remains surprisingly fresher than all other water. This difference in chemical composition could possibly be attributed to biologically mediated filtering of the ions and/or geochemical reactions.
Download or read book Unstressed Groundwater Flow in the Brazos River Alluvium Aquifer with Implications for Temporal Ranges in Groundwater to Surface Water Interactions written by Jairon McVea and published by . This book was released on 2023 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Groundwater flow paths and flow rates through alluvium aquifers are often oversimplified. This oversimplification may be due to sediment description limitations or aquifer properties obtained using well hydraulics that assume homogeneity. Groundwater travel times to the Brazos River channel can be longer than anticipated when the aquifer gradient is low and flow paths encounter heterogeneity within the lithologic framework. Conversely, travel times to the river channel can be less than anticipated when gradients are steep and homogeneous coarse sediment dominate the lithology within the aquifer while connecting directly to the river. This thesis investigates unstressed groundwater flow rates and flow paths under natural conditions using detailed lithologic logs to recreate more realistic heterogeneity of the Brazos River Alluvium Aquifer characteristics and a 2D finite element steady state model. These estimations provide important insight for surface to groundwater interactions within alluvium aquifers.
Download or read book Non point source pollution and implications regarding groundwater surface water interactions in Salado Creek Basin Texas written by Paul S. Rodusky and published by . This book was released on 1997 with total page 352 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Ground Water in the Flood plain Alluvium of the Brazos River Whitney Dam to Vicinity of Richmond Texas written by James Gerald Cronin and published by . This book was released on 1967 with total page 234 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Brazos River Basin Natural Salt Pollution Control written by and published by . This book was released on 1977 with total page 782 pages. Available in PDF, EPUB and Kindle. Book excerpt:
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.
Download or read book Ground water Resources of Brazos and Burleson Counties Texas written by Clarence R. Follett and published by . This book was released on 1974 with total page 210 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Understanding Surface Water Groundwater Interactions on the Blanco River Hays County TX written by Tiffany Noel Kocis and published by . This book was released on 2014 with total page 148 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Edwards and Trinity Aquifers supply over 700 million gallons per day (2.6 x 109 I/day) to the public; therefore, it is crucial to understand how water is lost from the Trinity and exchanged into the Edwards. This thesis addresses the following questions in the scope of Hays County, TX: How are gains and losses temporally and spatially distributed along the Blanco River? What controls the distribution of spring discharge contributing to gains along the Blanco River? Finally, what does this spatial and temporal distribution of gains, losses, and joints mean for available water resources? From a time-series analysis of gain-loss on the Blanco River, it is evident that coarse resolution gain-loss studies are not accurate enough to capture the flow dynamics of the river or to understand flow paths along the river, particularly after storm events. The coarse resolution studies miss out on spring discharge zones and on smaller, but significant recharge zones located within net-gain reaches. The detailed gain-loss study from November 2013 was compared to a detailed study conducted in January 1955; the comparison suggests that that gain-loss conditions change depending on flow conditions and that regions that serve as aquifer recharge zones during low flow conditions serve as discharge zones during high flow conditions, which may serve to offset water level declines in the aquifer at the beginning of a drought because recharge into the aquifer is sustained by flow in the Blanco River. Furthermore, when comparing the present method for estimating recharge (estimated as loss between two USGS gauges), using only the loss estimated by the gauges instead of a detailed gain-loss study is a significant underestimate (by 5 times) of the total amount of recharge entering the Edwards-Trinity system along the Blanco River. Finally, the structural analysis of fracture orientations suggests that the spring discharge fracture networks are actually joint networks controlled by both topography and the development of the Balcones Fault Zone. To conclude, both parts of this study have important implications for groundwater resources: understanding gain-loss dynamics provides an important dataset for Groundwater Availability Models and for conservation districts who must allocate water resources, and understanding the joint networks through which springs discharge could allow drillers to target high water yield fractures.
Download or read book Surface Water and Groundwater Interactions written by John Ricci and published by . This book was released on 2014 with total page 73 pages. Available in PDF, EPUB and Kindle. Book excerpt: This study investigates the interaction of the Trinity Aquifer with Cibolo Creek and the Guadalupe River within Kendal County, Texas. A program of water sampling and analysis was undertaken to characterize the water present within these three water bodies. The isotopic and geochemical data generated for each water body was then analyzed to determine possible interactions between the three bodies. Mixing models were used to analyze isotopic data to try and determine end member percent contributions to analyzed waters. Geochemical data on 17 parameters were analyzed by multivariate statistical techniques to determine clustering, groupings, similarities and differences between the analyzed water. From this analysis it was determined that Cibolo Creek bears little relation to the groundwater of the Trinity Aquifer and does not gain water from the aquifer. The similarity of water chemistry between the Guadalupe River and Trinity aquifer indicates that the Guadalupe River gains groundwater along at least some of its reach.
Download or read book Groundwater surface water interactions in Texas written by Bridget R. Scanlon and published by . This book was released on 2005 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Modeling of Ground water Flow and Surface Water ground water Interactions of the San Pedro River Basin Mexican border to Fairbank Arizona written by Leticia Beatriz Vionnet and published by . This book was released on 1992 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Ground Water surface Water Interactions written by American Water Resources Association. Summer Specialty Conference and published by . This book was released on 2002 with total page 626 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Water Code written by Texas and published by . This book was released on 1972 with total page 548 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Brazos River Basin Lakes O M written by and published by . This book was released on 1976 with total page 126 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Reconnaissance Investigation of the Ground water Resources of the Sabine River Basin Texas written by Bernard B. Baker and published by . This book was released on 1963 with total page 88 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Publications of the Geological Survey written by Geological Survey (U.S.) and published by . This book was released on 1986 with total page 452 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Modeling Water Resources Management at the Basin Level written by Ximing Cai and published by Intl Food Policy Res Inst. This book was released on 2006-01-01 with total page 169 pages. Available in PDF, EPUB and Kindle. Book excerpt: This report develops an integrated economic-hydrologic river basin model and applies it to the Maipo River Basin in central Chile. Policy simulations based on the modeling framework can serve as a guide for water resource managers and policymakers in designing appropriate water policies and establishing reform priorities for water resource allocation. Alternative analyses undertaken for the Maipo basin-a mature water economy with limited resources and competition for water across all water-using sectors-offer new insights into the changing relationships between irrigation system and basin-level water use efficiencies. They also show how these changing relationships affect farm incomes and environmental impacts. Simulations also provide new results on the role that the trading of water use rights can play in maintaining farm production levels, enhancing farmer incomes, and increasing water use efficiencies.
