Modeling Steady State Groundwater and Surface Water Interactions PDF Download
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Author: Sherry Mitchell-Bruker
Publisher:
ISBN:
Category :
Languages : en
Pages : 200
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Author: Sherry Mitchell-Bruker
Publisher:
ISBN:
Category :
Languages : en
Pages : 200
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Book Description
Author: Sharon E. Kroening
Publisher:
ISBN:
Category : Earth sciences
Languages : en
Pages : 122
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Book Description
Author: Corinna Abesser
Publisher:
ISBN:
Category : Groundwater
Languages : en
Pages : 228
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Book Description
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.
Author: Eric D. Swain
Publisher:
ISBN:
Category : Groundwater flow
Languages : en
Pages : 140
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Author:
Publisher:
ISBN:
Category :
Languages : en
Pages :
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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.
Author: Habil. Jörg Lewandowski
Publisher: MDPI
ISBN: 3039289055
Category : Science
Languages : en
Pages : 438
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Book Description
Recent years have seen a paradigm shift in our understanding of groundwater–surface water interactions: surface water and aquifers were long considered discrete, separate entities; they are now understood as integral components of a surface–subsurface continuum. This book provides an overview of current research advances and innovative approaches in groundwater–surface water interactions. The 20 research articles and 1 communication cover a wide range of thematic scopes, scales, and experimental and modelling methods across different disciplines (hydrology, aquatic ecology, biogeochemistry, and environmental pollution). The book identifies current knowledge gaps and reveals the challenges in establishing standardized measurement, observation, and assessment approaches. It includes current hot topcis with environmental and societal relevance such as eutrophication, retention of legacy, and emerging pollutants (e.g., pharmaceuticals and microplastics), urban water interfaces, and climate change impacts. The book demonstrates the relevance of processes at groundwater–surface water interfaces for (1) regional water balances and (2) quality and quantity of drinking water resources. As such, this book represents the long-awaited transfer of the above-mentioned paradigm shift in understanding of groundwater–surface water interactions from science to practice.
Author: Kenneth N. Brooks
Publisher: John Wiley & Sons
ISBN: 1118459741
Category : Technology & Engineering
Languages : en
Pages : 562
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Book Description
This new edition is a major revision of the popular introductory reference on hydrology and watershed management principles, methods, and applications. The book's content and scope have been improved and condensed, with updated chapters on the management of forest, woodland, rangeland, agricultural urban, and mixed land use watersheds. Case studies and examples throughout the book show practical ways to use web sites and the Internet to acquire data, update methods and models, and apply the latest technologies to issues of land and water use and climate variability and change.
Author: Gengxin Ou
Publisher:
ISBN: 9781321977776
Category :
Languages : en
Pages : 194
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Book Description
In this dissertation research, three modeling tools have been developed to help quantify the complex processes of integrated surface- and ground-water systems in an area under significant agricultural development of Nebraska. To evaluate irrigation effect on stream depletion for the Lower Platte River (LPR) basin, a regional three-dimensional, transient groundwater-flow model is established with MODFLOW. A simplified and more efficient solution has been developed to estimate the stream depletion rate by re-using the flow coefficients of the baseline run. The flow equation is linearized because the head coefficients become constant between solver iterations. The tool has been successfully applied to the LPR model. The results show that the stream depletion analysis tool can reduce the numerical errors produced in the conventional method and improve the computational efficiency. The second modeling tool is a cross-section based streamflow routing (CSR) package for MODFLOW to simulate the streamflow and the interaction between streams and aquifers for the stream with a width larger than the MODFLOW grid size. In the CSR package, streams are divided into stream segments which are formed by two consecutive cross-sections. A rapid algorithm is used to compute the submerged area of the MODFLOW grid. Stream-aquifer seepage is treated as lateral flow in the streamflow routing computation with the Muskingum-Cunge method or mass conservation method. A hypothetical problem was established to test the capabilities of the CSR package with steady- and transient-state models. The third part of this dissertation aims to quantify the impacts of natural processes and human activities on ground-water dynamics in highly agricultural areas by developing an integrated surface-ground water model (ISGWM). In ISGWM, SWAT and MODFLOW are linked by a soil water module (SWM), which is developed based on a non-iterative solution of the 1D Richards equation. SWM explicitly represents infiltration, soil evaporation, unsaturated water flow, root water update, and lateral drainage. Taking advantage of the simulation capacities of these SWAT, MODFLOW and SWM, ISGWM can simulate the physical hydrologic processes in three domains and their interactions. The model has been successfully applied to the Johnson Creek watershed, which is located within the Lower Platte Basin.
Author: Thomas E. Reilly
Publisher: DIANE Publishing
ISBN:
Category : Groundwater flow
Languages : en
Pages : 40
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Book Description
Author: Ali A. Ameli
Publisher:
ISBN:
Category :
Languages : en
Pages : 94
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Book Description
Groundwater-surface water interaction is a key component of the hydrologic cycle. This interaction plays a key role in many environmental issues such as the impacts of land use and climate change on water availability and water quality. Modeling of local and regional groundwater-surface water interactions improves understanding of these environmental issues and assists in addressing them. Because of the physical and mathematical complexities of this interaction, numerical approaches are generally used to model water exchange between subsurface and surface domains. The efficiency, accuracy, and stability of mesh-based numerical models, however, depend upon the resolution of the underlying grid or mesh. Grid-free analytical methods can provide fast, accurate, continuous and differentiable solutions to groundwater-surface water interaction problems. These solutions exactly satisfy mass balance in the entire internal domain and may improve our understanding of groundwater-surface water interaction principles. However, to model this interaction, analytical approaches typically required simplifying, sometimes unrealistic, assumptions. They are typically used to implement linearized mathematical models in homogenous confined or semi-confined aquifers with geometrically regular domains. By benefiting from the strengths of both analytical and numerical approaches, grid-free semi-analytical methods may be able to address more challenging groundwater problems which have been out of reach of traditional analytical approaches, and/or are poorly simulated using mesh-based numerical methods. Here, novel 2-D and 3-D semi-analytical solutions for the simulation of mathematically and physically complex groundwater-surface water interaction problems are developed, assessed and applied. Those models are based upon the series solution method and analytic element method (AEM) and are intended to address groundwater-surface water interactions induced by pumping wells and/or the presence of surface water bodies in naturally complex stratified unconfined aquifers. Semi-analytical solutions are obtained using the least squares method, which is used to determine the unknown coefficients in the series expansion and the unknown strengths of analytic elements. The series and AEM solutions automatically satisfy the groundwater governing equation. Hence, the resulting solutions are exact over the entire domain except along boundaries and layer interfaces where boundary and continuity conditions are met with high precision. A robust iterative algorithm is used to implement a free boundary condition along the phreatic surface with a priori unknown location. This thesis addresses three general problem types never addressed within a semi-analytic framework. First, a steady-state free boundary semi-analytical series solutions model is developed to simulate 2-D saturated-unsaturated flow in geometrically complex stratified unconfined aquifers. The saturated-unsaturated flow is controlled by water exchange along the land surface (e.g., evapotranspiration and infiltration) and the presence of surface water bodies. The water table and capillary fringe are allowed to intersect stratigraphic interfaces. The capillary fringe zone, unsaturated zone, groundwater zone and their interactions are incorporated with a high degree of accuracy. This model is used to assess the influences of important factors on unsaturated flow behavior and the water table elevation. Second, a 3-D free boundary semi-analytical series solution model is developed to simulate groundwater-surface water interaction controlled by infiltration, seepage faces and surface water bodies along the land surface. This model can simulate the water exchange between groundwater and surface water in geometrically complex stratified phreatic (unconfined) aquifers. The a priori unknown phreatic surface will be obtained iteratively while the locations of seepage faces don't have to be known a priori (i.e., this is a constrained free boundary problem).
