HR: 0800h
AN: H11F-0845    [Abstracts]
TI: Application of GIS Based Tools for Groundwater Recharge and Evapotranspiration Estimation: Arc-Recharge and RIPGIS-NET
AU: * Ajami, H
EM: hajami@hwr.arizona.edu
AF: University of Arizona, Department of Hydrology and Water Resources, Marshall Building, 5th floor P.O. Box 210158-B, Tucson, AZ 85721-0158, United States
AU: Hogan, J
EM: jhogan@hwr.arizona.edu
AF: University of Arizona, Department of Hydrology and Water Resources, Marshall Building, 5th floor P.O. Box 210158-B, Tucson, AZ 85721-0158, United States
AU: Maddock, T
EM: maddock@hwr.arizona.edu
AF: University of Arizona, Department of Hydrology and Water Resources, 1133 E James E. Rogers Way Harshbarger Blg, Room 122, Tucson, AZ 85721, United States
AU: Meixner, T
EM: tmeixner@hwr.arizona.edu
AF: University of Arizona, Department of Hydrology and Water Resources, 1133 E James E. Rogers Way Harshbarger Blg, Room 122, Tucson, AZ 85721, United States
AB: Water managers are increasingly concerned about the potential impact of climate variability and change on groundwater resources. Climate impacts on groundwater resources are primarily determined by altering the amount of recharge and evapotranspiration (ET). Typically, groundwater models employ temporally static recharge or ET rates with limited spatial variability across the basin. As a result most groundwater models cannot be used to assess the impacts of climate on groundwater resources. A primary challenge addressing this shortcoming is the need for spatially and temporally explicit recharge and ET model inputs. Geographic Information Systems (GIS) and spatially explicit data can be applied to develop these improved model inputs by quantifying and distributing recharge and ET across the model domain. Two ArcGIS desktop applications were developed for ArcGIS 9.2 to enhance recharge and ET estimation- Arc- Recharge and RIPGIS-NET. Arc-Recharge an ArcGIS 9.2 custom application is developed to quantify and distribute recharge along MODFLOW cells. Using spatially explicit precipitation data and Digital Elevation Model (DEM), Arc-Recharge routes water through the landscape and distributes the recharge to the appropriate groundwater model cells. RIPGIS-NET is an ArcGIS custom application that was developed to provide parameters for the RIP-ET package. RIP-ET is an improved MODFLOW ET module that simulates ET using a set of eco-physiologically based ET curves. RIPGIS-NET improves alluvial recharge estimation by providing spatially explicit information about the riparian/wetland ET. Application of Arc-Recharge and RIPGIS-NET in groundwater modeling enhances recharge and ET estimation by incorporating temporally and spatially explicit data. Using such tools, assessment of climate variability on groundwater resources will be enhanced.
DE: 1616 Climate variability (1635, 3305, 3309, 4215, 4513)
DE: 1819 Geographic Information Systems (GIS)
DE: 1829 Groundwater hydrology
SC: Hydrology [H]
MN: 2007 Fall Meeting