{
"USGS Publications Warehouse": {
"schema": {
"@context": "https://schema.org",
"@type": "CreativeWork",
"additionalType": "USGS Numbered Series",
"name": "Documentation for the State Variables Package for the Groundwater-Management Process of MODFLOW-2005 (GWM-2005)",
"identifier": [
{
"@type": "PropertyValue",
"propertyID": "USGS Publications Warehouse IndexID",
"value": "tm6A36",
"url": "https://pubs.usgs.gov/publication/tm6A36"
},
{
"@type": "PropertyValue",
"propertyID": "USGS Publications Warehouse Internal ID",
"value": 99083
},
{
"@type": "PropertyValue",
"propertyID": "DOI",
"value": "10.3133/tm6A36",
"url": "https://doi.org/10.3133/tm6A36"
}
],
"inLanguage": "en",
"isPartOf": [
{
"@type": "CreativeWorkSeries",
"name": "Techniques and Methods"
}
],
"datePublished": "2011",
"dateModified": "2012-02-02",
"abstract": "Many groundwater-management problems are concerned with the control of one or more variables that reflect the state of a groundwater-flow system or a coupled groundwater/surface-water system. These system state variables include the distribution of heads within an aquifer, streamflow rates within a hydraulically connected stream, and flow rates into or out of aquifer storage. This report documents the new State Variables Package for the Groundwater-Management Process of MODFLOW-2005 (GWM-2005). The new package provides a means to explicitly represent heads, streamflows, and changes in aquifer storage as state variables in a GWM-2005 simulation. The availability of these state variables makes it possible to include system state in the objective function and enhances existing capabilities for constructing constraint sets for a groundwater-management formulation. The new package can be used to address groundwater-management problems such as the determination of withdrawal strategies that meet water-supply demands while simultaneously maximizing heads or streamflows, or minimizing changes in aquifer storage. Four sample problems are provided to demonstrate use of the new package for typical groundwater-management applications.\r\n",
"description": "vii, 45 p.",
"publisher": {
"@type": "Organization",
"name": "U.S. Geological Survey"
},
"author": [
{
"@type": "Person",
"name": "Barlow, Paul M. pbarlow@usgs.gov",
"givenName": "Paul M.",
"familyName": "Barlow",
"email": "pbarlow@usgs.gov",
"identifier": {
"@type": "PropertyValue",
"propertyID": "ORCID",
"value": "0000-0003-4247-6456",
"url": "https://orcid.org/0000-0003-4247-6456"
},
"affiliation": [
{
"@type": "Organization",
"name": "Office of Ground Water",
"url": "https://www.usgs.gov/mission-areas/water-resources"
}
]
},
{
"@type": "Person",
"name": "Baker, Kristine M.",
"givenName": "Kristine M.",
"familyName": "Baker"
},
{
"@type": "Person",
"name": "Ahlfeld, David P.",
"givenName": "David P.",
"familyName": "Ahlfeld"
}
],
"funder": [
{
"@type": "Organization",
"name": "Office of Groundwater",
"url": "https://www.usgs.gov/mission-areas/water-resources"
}
]
}
}
}