caa a22 4500 445814616 CHVBK 20180317145222.0 cr unu---uuuuu 170323e20110901xx s 000 0 eng 10.1007/s10040-011-0743-0 doi (NATIONALLICENCE)springer-10.1007/s10040-011-0743-0 Impact of land-surface elevation and riparian evapotranspiration seasonality on groundwater budget in MODFLOW models [Elektronische Daten] [Hoori Ajami, Thomas Meixner, Thomas Maddock III, James Hogan, D. Guertin] Impact du relief du terrain et de la saisonnalité de l'évapotranspiration rivulaire sur le bilan hydrique des modèles MODFLOW Riparian groundwater evapotranspiration (ETg) constitutes a major component of the water balance especially in many arid and semi-arid environments. Although spatial and temporal variability of riparian ETg are controlled by climate, vegetation and subsurface characteristics, depth to water table (DTWT) is often considered the major controlling factor. Relationships between ETg rates and DTWT, referred to as ETg curves, are implemented in MODFLOW ETg packages (EVT, ETS1 and RIP-ET) with different functional forms. Here, the sensitivity of the groundwater budget in MODFLOW groundwater models to ETg parameters (including ETg curves, land-surface elevation and ETg seasonality) are investigated. A MODFLOW model of the hypothetical Dry Alkaline Valley in the Southwestern USA is used to show how spatial representation of riparian vegetation and digital elevation model (DEM) processing methods impact the water budget when RIPGIS-NET (a GIS-based ETg program) is used with MODFLOW's RIP-ET package, and results are compared with the EVT and ETS1 packages. Results show considerable impact on ETg and other groundwater budget components caused by spatial representation of riparian vegetation, vegetation type, fractional coverage areas and land-surface elevation. RIPGIS-NET enhances ETg estimation in MODFLOW by incorporating vegetation and land-surface parameters, providing a tool for ecohydrology studies, riparian ecosystem management and stream restoration. Springer-Verlag, 2011 Riparian groundwater evapotranspiration nationallicence Geographic Information Systems nationallicence MODFLOW nationallicence Groundwater budget nationallicence Ecohydrology nationallicence Ajami Hoori Department of Hydrology and Water Resources, University of Arizona, PO Box 210011, 85721, Tucson, AZ, USA aut Meixner Thomas Department of Hydrology and Water Resources, University of Arizona, PO Box 210011, 85721, Tucson, AZ, USA aut Maddock III Thomas Department of Hydrology and Water Resources, University of Arizona, PO Box 210011, 85721, Tucson, AZ, USA aut Hogan James Department of Hydrology and Water Resources, University of Arizona, PO Box 210011, 85721, Tucson, AZ, USA aut Guertin D. School of Natural Resources and the Environment, University of Arizona, Biological Sciences East, 85721, Tucson, AZ, USA aut Hydrogeology Journal Springer-Verlag 19/6(2011-09-01), 1181-1188 1431-2174 19:6<1181 2011 19 10040 https://doi.org/10.1007/s10040-011-0743-0 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s10040-011-0743-0 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Ajami Hoori Department of Hydrology and Water Resources, University of Arizona, PO Box 210011, 85721, Tucson, AZ, USA aut NATIONALLICENCE 700 1- Meixner Thomas Department of Hydrology and Water Resources, University of Arizona, PO Box 210011, 85721, Tucson, AZ, USA aut NATIONALLICENCE 700 1- Maddock III Thomas Department of Hydrology and Water Resources, University of Arizona, PO Box 210011, 85721, Tucson, AZ, USA aut NATIONALLICENCE 700 1- Hogan James Department of Hydrology and Water Resources, University of Arizona, PO Box 210011, 85721, Tucson, AZ, USA aut NATIONALLICENCE 700 1- Guertin D. School of Natural Resources and the Environment, University of Arizona, Biological Sciences East, 85721, Tucson, AZ, USA aut NATIONALLICENCE 773 0- Hydrogeology Journal Springer-Verlag 19/6(2011-09-01), 1181-1188 1431-2174 19:6<1181 2011 19 10040 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer