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Using The Pcraster Polflow Approach To Gis Based Modelling Of Coupled Groundwater Surface Water Hydrology In The Forsmark Area
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Book Synopsis Using the PCRaster-POLFLOW Approach to GIS-based Modelling of Coupled Groundwater-surface Water Hydrology in the Forsmark Area by : Jerker Jarsjö
Download or read book Using the PCRaster-POLFLOW Approach to GIS-based Modelling of Coupled Groundwater-surface Water Hydrology in the Forsmark Area written by Jerker Jarsjö and published by . This book was released on 2004 with total page 44 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis GIS-based Modelling of Coupled Groundwater - Surface Water Hydrology in the Forsmark and Simpevarp Areas by : Jerker Jarsjö
Download or read book GIS-based Modelling of Coupled Groundwater - Surface Water Hydrology in the Forsmark and Simpevarp Areas written by Jerker Jarsjö and published by . This book was released on 2006 with total page 53 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis RD&D-Programme 2004 by : Svensk kärnbränslehantering AB.
Download or read book RD&D-Programme 2004 written by Svensk kärnbränslehantering AB. and published by . This book was released on 2004 with total page 424 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Gsflow?coupled Ground-water and Surface-water Flow Model Based on the Integration of the Precipitation-runoff Modeling System (Prms) and the Modular Ground-water Flow Model (Modflow-2005) by : Steven L. Markstom
Download or read book Gsflow?coupled Ground-water and Surface-water Flow Model Based on the Integration of the Precipitation-runoff Modeling System (Prms) and the Modular Ground-water Flow Model (Modflow-2005) written by Steven L. Markstom and published by CreateSpace. This book was released on 2014-07-17 with total page 250 pages. Available in PDF, EPUB and Kindle. Book excerpt: The need to assess the effects of variability in climate, biota, geology, and human activities on water availability and flow requires the development of models that couple two or more components of the hydrologic cycle. An integrated hydrologic model called GSFLOW (Ground-water and Surface-water FLOW) was developed to simulate coupled ground-water and surface-water resources. The new model is based on the integration of the U.S. Geological Survey Precipitation-Runoff Modeling System (PRMS) and the U.S. Geological Survey Modular Ground-Water Flow Model (MODFLOW). Additional model components were developed, and existing components were modified, to facilitate integration of the models. Methods were developed to route flow among the PRMS Hydrologic Response Units (HRUs) and between the HRUs and the MODFLOW finite-difference cells. This report describes the organization, concepts, design, and mathematical formulation of all GSFLOW model components. An important aspect of the integrated model design is its ability to conserve water mass and to provide comprehensive water budgets for a location of interest. This report includes descriptions of how water budgets are calculated for the integrated model and for individual model components. GSFLOW provides a robust modeling system for simulating flow through the hydrologic cycle, while allowing for future enhancements to incorporate other simulation techniques.
Book Synopsis Upscaling of Coupled Models with Topography-Driven Surface-Water/Groundwater Interactions by : Andrew P. Snowdon
Download or read book Upscaling of Coupled Models with Topography-Driven Surface-Water/Groundwater Interactions written by Andrew P. Snowdon and published by . This book was released on 2015 with total page 131 pages. Available in PDF, EPUB and Kindle. Book excerpt: Since the 1950s, groundwater and surface water models have evolved to better represent complex hydrological and hydrogeological systems. Part of this evolution has been the coupling of surface and subsurface models to properly simulate the transfer of mass between the two systems. While generally robust for simulating phenomena at smaller scales, existing coupled and fully-integrated models are problematic for larger-scale operational use. Fine-scale models are often computationally prohibitive due to the vast amounts of computational data required and because surface and subsurface models are often not discretized the same spatially. Conversely, faster coarse-scale models incorrectly simulate groundwater-surface water exchange fluxes because they neglect the details of subgrid water exchange. The primary goal of this thesis is to develop and test a regional-scale coupled model that may be used in an operational context. The model has two unique features: (1) it uses a novel upscaling formulation for handling groundwater/surface water exchange fluxes and (2) it can operate using unstructured grids (e.g., surface water basin boundaries) as the basic level of discretization for surface water and groundwater systems. The proposed upscaling approach is developed using fine-resolution topography-driven groundwater flow models to generate relationships between vertical water fluxes and average groundwater head. The relationships are used, in coarse-scale models, to represent groundwater-surface water exchange fluxes. These are then implemented in a new groundwater model that is coupled with the surface water model Raven. Comparisons with Modflow and HydroGeosphere are conducted to determine the effectiveness of this new approach.
Book Synopsis Use of a Ground-water Flow Model with Particle Tracking to Evaluate Ground-water Vulnerability, Clark County, Washington by : Daniel T. Snyder
Download or read book Use of a Ground-water Flow Model with Particle Tracking to Evaluate Ground-water Vulnerability, Clark County, Washington written by Daniel T. Snyder and published by . This book was released on 1996 with total page 84 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Groundwater Modeling Using Geographical Information Systems by : George F. Pinder
Download or read book Groundwater Modeling Using Geographical Information Systems written by George F. Pinder and published by John Wiley & Sons. This book was released on 2002-11-06 with total page 247 pages. Available in PDF, EPUB and Kindle. Book excerpt: Cutting-edge techniques for groundwater modeling using GIS technology Groundwater Modeling Using Geographical Information Systems covers fundamental information on flow and mass transport modeling and demonstrates how GIS technology makes these models and analyses more accurate than ever before. GIS technology allows for swift organization, quantification, and interpretation of large quantities of geohydrological data with computer accuracy and minimal risk of human error. This book's companion Web site provides the Princeton Transport Code, as well as the plug-in extensions required to interface this code with the Argus ONE numerical environment software enclosed with this book. Plug-in extensions for MODFLOW and MT3D computer codes can be found at the Argus ONE Web site (www.argusint.com). The process for using the Geographic Modeling Approach (GMA) to model groundwater flow and transport is demonstrated step by step with a field example from Tucson, Arizona. The GMA is composed of the Argus ONE Geographic Information Modeling system and the Princeton Transport Code groundwater flow and transport model, interfaced through the plug-in extension available on Argus ONE. Enhanced with more than 150 illustrations and screen captures, Groundwater Modeling Using Geographical Information Systems is a fundamental book for civil engineers, hydrologists, environmental engineers, geologists, and students in these fields, as well as software engineers working on GIS applications and environmental attorneys and regulators. When used in combination with the free modeling software, this book provides an excellent student text.
Book Synopsis OpenGeoSys-Tutorial by : Agnes Sachse
Download or read book OpenGeoSys-Tutorial written by Agnes Sachse and published by Springer. This book was released on 2015-03-23 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: This tutorial on the application of the open-source software OpenGeoSys (OGS) in computational hydrology is based on a one-week training course at the Helmholtz Centre for Environmental Research in Leipzig, Germany. It provides general information regarding hydrological and groundwater flow modeling and the pre-processing and step-by-step model setups of a case study with OGS and related components such as the OGS Data Explorer. The tutorial also illustrates the application of pre- and post-processing tools such as ArcGIS and ParaView. This book is intended primarily for graduate students and applied scientists who deal with hydrological-system analysis and hydrological modeling. It is also a valuable source of information for practicing hydrologists wishing to further their understanding of the numerical modeling of coupled hydrological-hydrogeological systems. This tutorial is the first in a series that will present further OGS applications in environmental sciences.
Book Synopsis Evaluation of Potential GIS/groundwater Model Linkages by : Egide Nizeyimana
Download or read book Evaluation of Potential GIS/groundwater Model Linkages written by Egide Nizeyimana and published by . This book was released on 1997 with total page 62 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Modeling Surface Water and Groundwater Interactions in Agricultural Areas by : Gengxin Ou
Download or read book Modeling Surface Water and Groundwater Interactions in Agricultural Areas written by Gengxin Ou and published by . This book was released on 2015 with total page 194 pages. Available in PDF, EPUB and Kindle. Book excerpt: 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.
Book Synopsis Sensitivity Analysis of Coupled Groundwater Processes Within a Land Surface Model by : R. M. Maxwell
Download or read book Sensitivity Analysis of Coupled Groundwater Processes Within a Land Surface Model written by R. M. Maxwell and published by . This book was released on 2004 with total page 3 pages. Available in PDF, EPUB and Kindle. Book excerpt: Management of surface water quality is often complicated by interactions between surface water and groundwater. Traditional Land-Surface Models (LSM) used for numerical weather prediction, climate projection, and as inputs to water management decision support systems, do not treat the lower boundary in a fully process-based fashion. LSMs have evolved from a leaky bucket to more sophisticated land surface water and energy budgets that typically have a so-called basement term to depict the bottom model layer exchange with deeper aquifers. Nevertheless, the LSM lower boundary is often assumed zero flux or the soil moisture content is set to a constant value; an approach that while mass conservative, ignores processes that can alter surface fluxes, runoff, and water quantity and quality. Conversely, models for saturated and unsaturated water flow, while addressing important features such as subsurface heterogeneity and three-dimensional flow, often have overly simplified upper boundary conditions that ignore soil heating, runoff, snow and root-zone uptake. In the present study, a state-of-the-art LSM (CLM2.0) and a variably-saturated groundwater model (ParFlow) have been coupled as single model, in single-column and distributed form. An initial set of single column simulations based on data from the Project for Intercomparison of Land-surface Parameterization Schemes (PILPS) and synthetic data demonstrate the temporal dynamics of both of the coupled models. A 15-year single-column simulation using the data from the Usadievskiy catchment in Valdai, Russia demonstrate the coupled model's ability to accurately predict the soil moisture profile and location of the water table, in addition to water and energy balance within the watershed. The distributed coupled model will also be demonstrated using a series of spatially variable subsurface parameter runs, which will be used to investigate upscaling in land-surface models. The coupled model will ultimately be used to assist in the development of Total Maximum Daily Loads (TMDLs- a surface water quality standard) for a number of pollutants in an urban watershed in Southern California in the United States.
Book Synopsis The Double Constraint Inversion Methodology by : Wouter Zijl
Download or read book The Double Constraint Inversion Methodology written by Wouter Zijl and published by Springer. This book was released on 2017-12-26 with total page 109 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book describes a novel physics-based approach to inverse modeling that makes use of the properties of the equations governing the physics of the processes under consideration. It focuses on the inverse problems occurring in hydrogeology, but the approach is also applicable to similar inverse problems in various other fields, such as petroleum-reservoir engineering, geophysical and medical imaging, weather forecasting, and flood prediction. This approach takes into consideration the physics – for instance, the boundary conditions required to obtain a well-posed mathematical problem – to help avoid errors in model building and therefore enhance the reliability of the results. In addition, this method requires less computation time and less computer memory. The theory is presented in a comprehensive, not overly mathematical, way, with three practice-oriented hydrogeological case studies and a comparison with the conventional approach illustrating the power of the method. Forward and Inverse Modeling of Groundwater Flow is of use to researchers and graduate students in the fields of hydrology, as well as to professional hydrologists within industry. It also appeals to geophysicists and those working in or studying petroleum reservoir modeling and basin modeling.
Book Synopsis GSFLOW, Coupled Ground-Water and Surface-Water Flow Model Based on the Integration of the Precipitation-Runoff Modeling System (PRMS) and the Modular Ground-Water Flow Model (MODFLOW-2005) by :
Download or read book GSFLOW, Coupled Ground-Water and Surface-Water Flow Model Based on the Integration of the Precipitation-Runoff Modeling System (PRMS) and the Modular Ground-Water Flow Model (MODFLOW-2005) written by and published by . This book was released on 2008 with total page 240 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis A coupled surface-water and ground-water flow model for simulation of stream-aquifer interaction open-file report 92-138 by : Eric D. | Wexler Swain (Eliezer J.)
Download or read book A coupled surface-water and ground-water flow model for simulation of stream-aquifer interaction open-file report 92-138 written by Eric D. | Wexler Swain (Eliezer J.) and published by . This book was released on 1993 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis OpenGeoSys Tutorial by : Agnes Sachse
Download or read book OpenGeoSys Tutorial written by Agnes Sachse and published by . This book was released on 2017 with total page 75 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Integrated Surface-groundwater Flow Modeling by :
Download or read book Integrated Surface-groundwater Flow Modeling written by and published by . This book was released on 2005 with total page 40 pages. Available in PDF, EPUB and Kindle. Book excerpt: Interactions between surface and ground water are a key component of the hydrologic budget on the watershed scale. Models that honor these interactions are commonly based on the conductance concept that presumes a distinct interface at the land surface, separating the surface from the subsurface domain. These types of models link the subsurface and surface domains via an exchange flux that depends upon the magnitude and direction of the hydraulic gradient across the interface and a proportionality constant (a measure of the hydraulic connectivity). Because experimental evidence of such a distinct interface is often lacking in field systems, there is a need for a more general coupled modeling approach. A more general coupled model is presented that incorporates a new two-dimensional overland flow simulator into the parallel three-dimensional variable saturated subsurface flow code ParFlow. In ParFlow, the overland flow simulator takes the form of an upper boundary condition and is, thus, fully integrated without relying on the conductance concept. Another important advantage of this approach is the efficient parallelism incorporated into ParFlow, which is efficiently exploited by the overland flow simulator. Several verification and simulation examples are presented that focus on the two main processes of runoff production: excess infiltration and saturation. The model is shown to reproduce an analytical solution for overland flow and compares favorably to other commonly used hydrologic models. The influence of heterogeneity of the shallow subsurface on overland flow is also examined. The results show the uncertainty in overland flow predictions due to subsurface heterogeneity and demonstrate the usefulness of our approach. Both the overland flow component and the coupled model are evaluated in a parallel scaling study and show to be efficient.
Book Synopsis Integrated Modeling of Surface Water Hydrology Using ArcView GIS by : Pipat Reungsang
Download or read book Integrated Modeling of Surface Water Hydrology Using ArcView GIS written by Pipat Reungsang and published by . This book was released on 1998 with total page 266 pages. Available in PDF, EPUB and Kindle. Book excerpt: Conceptually, the modeling environment consists of several interrelated components, including: (a) an overland flow modeling module; (b) a channel flow modeling module; (c) an infiltration module; (d) a flow routing module; and (e) a pre- and post-processing module for the preparation of input data and the analysis and display of the simulation results. To test thecapability of the modeling environment, the overland flow and channel flow characteristics of the Walnut Creek watershed located near Ames, Iowa was investigated as an example application. Results obtained from this example application were reasonably good and provide evidence on the usability of the modeling environment.
