groundwater modeling Articles

  • Groundwater and contaminant transport modelling

    Client: Nuclear Industry Location: Cumbria, UK Services: Radioactive waste consultancy, hydrogeological risk assessment Issues: Potential risk to groundwater, environment and human health. System conceptualisation Summary: ESI developed a FEFLOW finite element model of the groundwater system in the ...

  • Large Scale Groundwater Modelling

    The hydrological model LISFLOOD is a spatially-distributed, partially physically-based rainfall-runoff model that has been devised to simulate the hydrological behaviour in large European catchments, with emphasis on predicting floods and droughts. In the model the groundwater component is represented by two interconnected linear reservoirs, with the outflow in some unit of time being ...


  • Modelling of groundwater flow and heat transport

    Client: Transport for London Location: London Services: Groundwater Modelling Issues: Identifying the potential effects of pumping excess heat to the Chalk aquifer Summary: ESI was commissioned to test the feasibility of one of the possible solutions identified to prevent temperatures on the ...

  • Upper Colne groundwater model update

    Client: Environment Agency Location: Hertfordshire Services: Groundwater Modelling , Low Flow Studies and Hydroecology Issues: Identification of management options for low flows in the River Gade Summary: ESI developed a groundwater model of the Upper Colne Catchment capable of simulating ...

  • The application of groundwater modelling to simulate the behaviour of groundwater resources in the Ramhormooz Aquifer, Iran

    In this study, groundwater modelling was proposed as management tool in Ramhormooz Plain, south western Iran. After definition of a conceptual model, the necessary data were defined into various packages of MODFLOW. Subsequently, the model was calibrated by trial and error estimation and the results were finally optimised by PMWIN through PEST code. After verification process, the model was used ...


    By Inderscience Publishers

  • Applicability of the most frequent value method in groundwater modeling

    The Most Frequent Value Method (MFV) is applied to groundwater modeling as a robust and effective geostatistical method. The Most Frequent Value method is theoretically derived from the minimization of the information loss called the I-divergence. The MFV algorithm is then coupled with global optimization (Very Fast Simulated Annealing) to provide a powerful method for solving the inverse ...


    By Springer

  • A grid-based integrated surface–groundwater model (GISMOD)

    A distributed hydrological model, the Grid-based Integrated Surface-groundwater MODel (GISMOD), was developed to simulate hydrological processes by considering water interaction among different soil layers. The model integrates six modules. Basic information on catchment, such as the flow direction and the drainage network, can be obtained automatically from digital elevation model (DEM) data ...


    By IWA Publishing

  • Saline intrusion groundwater model: water company

    Client: Water Industry Location: Sussex Services: Groundwater Modelling, Water Quality and Groundwater Protection Issues: Impact on deployable groundwater resources from saline intrusion within a Chalk aquifer Summary: ESI was commissioned to produce a scoping model to simulate the effect of ...

  • Integrating GIS and Groundwater Modeling Technologies for SWAPP Development

    Groundwater Modeling and GIS Technologies: Powerful Tools for Data Integration and Analysis Groundwater modeling and Geographic Information System (GIS) technologies are useful tools for developing a Source Water Assessment and Protection Plan (SWAPP) to assist planners in protecting groundwater ...


    By Weston Solutions, Inc

  • Bromsgrove Permo-Triassic Sandstone: Regional groundwater model

    Client: Environment Agency Location: Bromsgrove, UK Services: Groundwater Modelling Issues: Management of groundwater resources in the Bromsgrove area Summary: ESI was commissioned by the Environment Agency to develop a regional groundwater model of the Bromsgrove Permo-Triassic sandstone ...

  • An ecohydrologic model for a shallow groundwater urban environment

    The urban environment is a patchwork of natural and artificial surfaces that results in complex interactions with and impacts to natural hydrologic cycles. Evapotranspiration is a major hydrologic flow that is often altered through urbanization, although the mechanisms of change are sometimes difficult to tease out due to difficulty in effectively simulating soil–plant–atmosphere ...


    By IWA Publishing

  • Modeling Leachate Contamination and Remediation of Groundwater at a Landfill Site

    Leachate contamination of an aquifer from a landfill sitewas simulated using the groundwater flow and transport model SUTRA developed by the U.S. Geological Survey. The model calibration was performed by spatially adjusting the hydraulic conductivity in order to capture the measured hydraulic head spatial variation and then by adjusting the dispersivity and porosity match the measured chloride ...


    By Springer

  • Shropshire Permo-Triassic sandstone: Regional groundwater model

    Client: Environment Agency Location: Shropshire Services: Groundwater Modelling Issues: Management of groundwater resources in Shropshire Summary: ESI was commissioned by the Environment Agency to develop a regional groundwater model of the East Shropshire Permo-Triassic sandstone aquifer.  ...

  • Sharpening Your Way to Better Groundwater Models

    There is a well-known fable about a wood cutter who was hired by a timber merchant to cut down trees. This well sought-after job paid well and had excellent working conditions. The wood cutter wanted to succeed in his new job so the first day he worked hard and cut down 18 trees. Determined to do even better on the second day, the wood cutter tried harder but only cut down 15 trees. Day after day ...


    By Waterloo Hydrogeologic

  • Modeling groundwater upwelling as a control on river ice thickness

    The Tanana River flows through interior Alaska, a region characterized by discontinuous permafrost. Studies link degrading permafrost to increased winter river discharge due to greater groundwater (GW) recharge increasing GW input to river baseflow. In winter, interior Alaskan rivers are exclusively fed by GW, which provides an external source of heat. In fact, some portions of rivers fed by GW ...


    By IWA Publishing

  • Mathematical model predicting arsenic bioleaching in groundwater treatment

    In the Southeast Asia region, arsenic contamination of groundwater has been reported in several countries and a large number of arsenic treatment units were installed in many regions. Microbial activity can greatly affect the mobilization of arsenic under anaerobic conditions when coupled with the oxidation of organic matter. In this study, a mathematical model was developed to predict the ...


    By IWA Publishing

  • Recent papers in groundwater remediation

    Computational cost is a critical issue for large-scale water resource optimization under uncertainty, since time-intensive Monte Carlo simulations are often required to evaluate over multiple parameter realizations. This paper presents an efficient approach for replacing most Monte Carlo simulations with efficient surrogate models within a noisy genetic algorithm (GA). The surrogates are trained ...


    By IWA Publishing

  • Dynamics of nitrate & perchlorate in groundwater.

    The Apache Powder Superfund Site is located in Cochise County, Arizona, approximately 50 miles southeast of Tucson. The site was listed on the National Priorities List pursuant to CERCLA in 1990. Principal groundwater chemicals of concern (COCs) include nitrate-nitrogen (nitrate-N) and perchlorate. Concentrations of nitrate-N exceeding 500 mg/l and 2,300 mg/l have been detected in the “shallow ...


    By Hargis + Associates Inc

  • Ranking of conceptualized groundwater models based on model information criteria

    Modelers typically test alternative conceptualizations of a groundwater system because the ‘true’ hydrogeological model of the system is unknown, and the observed data are limited. This study elaborates on how to rank different conceptualizations of a groundwater system by using selection techniques and criteria that make a balance between complexity and accuracy of models. ...


    By IWA Publishing

  • Who Owns Groundwater?

    California’s drought underscores the need to improve how the state - and the rest of us - divvy up a resource in demand. Grapevines march across wires strung along rolling hills, their little trunks improbably supporting heavy black fruit. Cindy Steinbeck’s family has been farming this land since 1920. They grow Zinfandel, Viognier, Cabernet, Merlot, and Petite Syrah grapes but are ...


    By Ensia

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