Results 241 to 250 of about 15,737 (297)
Some of the next articles are maybe not open access.

Modeling Multiaquifer Wells with MODFLOW

Groundwater, 2004
Multiaquifer wells, i.e., wells that are open across more than one aquifer, can have a profound effect on the hydraulics of a ground water system. These wells change the physical system by establishing direct hydraulic links between otherwise isolated strata.
Matthew J. Tonkin   +1 more
openaire   +3 more sources

SEEPAGE, a New MODFLOW DRAIN Package

Groundwater, 2004
AbstractThe prediction of the location of ground water discharge areas is a key aspect for the protection and (re)development of ground water‐dependent wetlands. Ground water discharge areas can be simulated with MODFLOW using the DRAIN package by setting the drain level equal to the topography, while the conductance is mostly set to an arbitrary high ...
Batelaan, Okke, De Smedt, Florimond
openaire   +4 more sources

A Python Script to Compute Isochrones for MODFLOW

Groundwater, 2017
AbstractMODFLOW constitutes today the most popular modeling tool in the study of water flow in aquifers and in modeling aquifers. To simplify the interface to MODFLOW various GUI have been developed for the creation of model definition files and for the visualization and interpretation of results. Recently Bakker et al.
FEO, Alessandra   +3 more
openaire   +4 more sources

Axisymmetric Modeling Using MODFLOW‐USG

Groundwater, 2019
AbstractAxisymmetric groundwater models are used for simulating radially symmetric conditions. Groundwater simulators built specifically to model axisymmetric conditions are most commonly used for simulating aquifer tests. Although some numerical models capable of simulating flow and solute transport that are developed in the cartesian coordinate ...
Vivek Bedekar   +2 more
openaire   +2 more sources

GLOBGM v1.0: a parallel implementation of a 30 arcsec PCR-GLOBWB-MODFLOW global-scale groundwater model

Geoscientific Model Development
. We discuss the various performance aspects of parallelizing our transient global-scale groundwater model at 30′′ resolution (30 arcsec; ∼ 1 km at the Equator) on large distributed memory parallel clusters.
J. Verkaik   +4 more
semanticscholar   +1 more source

MODFLOW data extractor program

Open-File Report, 2005
Abstract : EXTRACTOR is a program that extracts data from formatted and labeled MODFLOW head or drawdown files or from MODFLOW-GWT concentration or velocity files. The user specifies the number of rows, columns, and layers in the target data file, the desired time step or move number, and the range of rows, columns, and layers for which data should be ...
Brendan A. Zinn, Leonard F. Konikow
openaire   +2 more sources

Improved Calculations for Dewatered Cells in MODFLOW [PDF]

open access: possibleGroundwater, 2001
AbstractUse of the United States Geological Survey ground water flow model MODFLOW is often hampered by the occurrence of “dry cells.” While MODFLOW allows such cells to “rewet” in the course of a simulation, stability of the heads solution process is often problematical with rewetting functionality operative.
openaire   +2 more sources

Improved water table dynamics in MODFLOW

Groundwater, 2005
AbstractThe standard formulation of a block‐centered finite‐difference model, such as MODFLOW, uses the center of the cell as the location of a cell node. Simulations of a dynamic water table can be improved if the node of a cell containing the water table is located at the water table rather than at the center of the cell.
openaire   +4 more sources

MODFLOW-2005 : the U.S. Geological Survey modular ground-water model--the ground-water flow process

, 2005
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A. W. Harbaugh
semanticscholar   +1 more source

Implementing Spatially Variable Anisotropy in MODFLOW

Groundwater, 1997
AbstractThe U.S. Geological Survey modular ground‐water flow model (MODFLOW) allows column to row anisotropy to vary only in different layers. Modifications to the code were made to allow each grid block in the model to have its own anisotropy, and still retain backward compatibility with the original formulation.
Gregory J. Ruskauff, Michael P. Kladias
openaire   +2 more sources

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