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 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 Groundwater surface Water Interactions written by Claudia Dawson and published by . This book was released on 2022 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Urban expansion and the subsequent need for construction materials are increasing aggregate mining activities in many areas around the world. In central Texas much of the aggregate has come from alluvial sediments in the Brazos River valley which also comprise the Brazos River Alluvium Aquifer. Aggregate mining is exempt from many reclamation requirements and the result is a series of post-mining gravel pit lakes in the Brazos River Alluvium Aquifer exposing the aquifer to surface conditions. This study examines two gravel pit lakes in the Brazos River Alluvium Aquifer to determine if the lakes act as sinks, recharge sites, or flow-through groundwater-fed lakes. Data based on water elevation, specific conductivity, isotopic values, and a two-dimensional finite element model suggest that both lakes are flow-through systems throughout the year.
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 Effluent impacted Groundwater surface Water Interactions in the Brazos River Alluvium Aquifer written by Lauren E. Lubianski and published by . This book was released on 2021 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: The primary recharge source to the Brazos River Alluvium Aquifer (BRAA), a water table aquifer in central Texas, is through direct precipitation on the floodplain. However, recharge provided by other sources, such as Brazos River tributaries crossing the alluvium is not well known. To quantify potential recharge from tributaries hydraulically connected to the BRAA and understand spatiotemporal interactions with the aquifer, Bullhide Creek was chosen due to its constant effluent discharge from a wastewater treatment plant and a 3-mile reach that interacts with the BRAA. Based on ionic and isotopic compositions, nutrient densities, and changes in flow measured throughout the studied reach, Bullhide Creek exhibits perennial streamflow after the wastewater contribution and gains flow from the BRAA during baseflow conditions. However, the creek may provide measurable recharge to the aquifer during periods of high flow through seepage to aquifer sediments adjacent to the channel and banks.
Download or read book Characterizing Groundwater surface Water Interactions in a Regulated River Using Electrical Resistivity written by Michael Sean Markowski and published by . This book was released on 2010 with total page 62 pages. Available in PDF, EPUB and Kindle. Book excerpt: The regular release of water from Tom Miller Dam, Austin, TX causes daily stage oscillations in the Colorado River that persist downstream over long distances. Fifteen km downstream from the dam, at the Hornsby Bend Center for Environmental Research, river stage rises and falls by nearly a meter every day. The objective of this research project was to test a method of electrical resistivity imaging that detects and characterizes the effects of this stage fluctuation on groundwater/ surface water interactions. Two separate resistivity methods are utilized in this study. A stationary transect is run across the width of the river. Data collection along this transect is repeated back-to-back for approximately 24 hours to capture the 24 hour cycle of the stage oscillation. Continuous Resistivity Profiling (CRP) was also used along two separate transects each about 400 m. The two transects were repeated ten times, at 2.5 hour intervals to correspond with the 24 hour stage oscillation. Stacking the tomographs from the stationary transect into a time-lapse representation shows significant changes in resistivity in the uppermost 2.0 m of substrate located immediately below the sediment-water interface. Results from the CRP profiles indicate that this exchange can be detected over an even larger spatial scale. These results show electrical resistivity as a powerful tool for better understanding the effects of oscillating river stage on hyporheic processes.
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 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 Intra meander Groundwater surface Water Interactions in a Losing Experimental Stream written by John David Nowinski and published by . This book was released on 2010 with total page 160 pages. Available in PDF, EPUB and Kindle. Book excerpt: Groundwater-surface water interactions between streams and shallow alluvial aquifers can significantly affect their thermal and chemical regimes and thus are critical for effective management of water resources and riparian ecosystems. Of particular significance is the hyporheic zone, an area delineated by subsurface flow paths that begin and end in surface water bodies. Although detailed work has examined hyporheic flow in the vertical dimension, some studies have suggested that the drop in a stream's elevation as it flows downstream can laterally extend the hyporheic zone. This study examines intra-meander hyporheic flow using extensive field measurements in a full-scale experimental stream-aquifer system. Synoptic head measurements from 2008 and 2009 and a lithium tracer test were conducted to determine the extent and nature of hyporheic flow within the meander. Permeability was measured and sediment cores were analyzed from 2008 to 2009 to assess aquifer properties. Finally, transient head and temperature measurements were collected during flooding events to assess the sensitivity of intra-meander hyporheic flow and temperature to stream discharge. Results verify that hyporheic flow through meanders occurs, but show that it is sensitive to whether a stream is gaining or losing water to the subsurface overall. In addition, permeability and core grain size results indicate moderate heterogeneity in permeability can occur in aquifers composed of relatively uniform sediment. Results also demonstrate that permeability in alluvial aquifers can evolve through time. Such evolution may be driven by groundwater flow, which transports fine particles from areas where porosity and permeability are relatively high and deposits them where they are relatively low, thus creating a positive feedback loop. Finally, measurements during flooding indicate that steady-state hyporheic flow and the thermal regime within the aquifer are largely insensitive to stream discharge. Together, these results expand upon previous field studies of intra-meander hyporheic flow and verify previous modeling work, although they demonstrate a level of complexity within these systems that should be considered in future work.
Download or read book Texas Aquifers Study written by Texas Water Development Board and published by . This book was released on 2016 with total page 326 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Groundwater surface water interaction written by P. A. White and published by . This book was released on with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
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 Developing Methodologies for Supporting Groundwater Monitoring Management and Sustainability in Central Texas and Northern Uganda written by Stephanie S. Wong and published by . This book was released on 2021 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: In data-scarce and geologically complex aquifers, knowledge building remains an important foundation for further field studies, aquifer modelling, and otherwise supporting sustainable resource development and management. A body of research was undertaken to increase insight into groundwater systems in two challenging contexts, data-scarce regions and highly heterogeneous karst regions, using traditional and novel approaches. Research and education were integrated during an evaluation of groundwater resource sustainability and wastewater management practices in a data-scarce region, northern Uganda. Basic hydrogeologic understanding was established through field work, staff interviews, and literature. An opportunity to collaborate with a visiting surveying and master planning team leveraged time spent onsite for greater results. Hydrologic education occurred formally and informally, through science lessons and daily interactions with stakeholders. Knowledge gained enabled researchers to make recommendations for preserving groundwater quantity and quality. Site-specific information was incorporated into a master plan for future development. Education efforts and trust gained through immersion in local life increased awareness and acceptance regarding groundwater sustainability. Investigating hydrological processes at local and regional scales is an important part of managing groundwater for water supply and critical habitat for aquatic species. However, characterizing aquifer relationships is challenging in a fractured, karsted limestone basin. Using a natural, non-invasive tracer such as radon can help understand groundwater flow and differentiating reaches of surface versus groundwater-dominated flow for water supply and habitat. The groundwater radon conceptual model was tested at several spatial scales in the Northern Segment of the Edwards BFZ aquifer. Results indicate that flow magnitude and the exposed surface area of porous media impact measured radon concentration in groundwater and surface waters. Flow rate and aquifer composition are important considerations when interpreting natural radon concentrations particularly beyond the site scale. Though groundwater-surface water interactions have been described and studied in riverine, wetland, and natural lacustrine settings, there has been less research attention on interaction between constructed reservoirs and adjacent aquifers. Surface and groundwater were collected from Stillhouse Hollow Reservoir and surrounding springs; traditional hydrogeochemical parameters were integrated with a novel environmental tracer, environmental DNA, to confirm and document surface water influence from a reservoir in karst springs. Though all measured parameters confirm some degree of groundwater-surface water interaction at groundwater sites, different parameters provided different insights into the system.
Download or read book Groundwater Surface Water Interaction written by Jacob Kidmose and published by . This book was released on 2010 with total page 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 Delineating Groundwater surface Water Interaction written by and published by . This book was released on 2015 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book ONE DIMENSIONAL STEADY STATE COUPLED GROUNDWATER SURFACE WATER MODEL AND DATABASE FOR THE MESILLA ALLUVIAL AQUIFER NEW MEXICO AND TEXAS USA written by and published by . This book was released on 2020 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Abstract : This study is focused on the Middle Rio Grande basin which extends for 153.5 km from below the Caballo reservoir, NM to El Paso, TX. This region is among the top most water-stressed places in America due to the water scarcity [1]. The Rio Grande is connected hydraulically to the underlying alluvial aquifers. Extraction of groundwater from the alluvial aquifer is suspected to substantially affect the streamflow in the Rio Grande. The present work models the surface water-groundwater system to provide information for the water managers and the other local policy makers. A one-dimensional finite-difference model has been developed that can simulate transient and steady-state surface water. The one-dimensional groundwater model, which is modeled using the implicit finite-difference method, can model the steady-state flow in the alluvium aquifer. The steady-state surface water and groundwater models are coupled using Darcy's law model of the channel-alluvial aquifer exchange. The model simulates conjunctive use of groundwater and surface water considering the interactions of Rio Grande flow with the multi-branched irrigation fields, and municipal and agricultural pumping. This report details the Rio Grande study area, the data collection, and the surface water-groundwater mathematical model.
