Abstract
Estimating Impacts from Groundwater on Stream Flows Using ArcGIS Tools Track: Water Resources Author(s): Jesse Bradley In hydrologically connected regimes where detailed groundwater models do not exist, it is often valuable for water resources planners and managers to determine the level of impact pumping ground water wells will have on stream flows. A commonly used method was developed by Jenkins (1968) to assess the effects of groundwater depletions on surface water flows. This paper focuses on the use of the ArcGIS tools and Model Builder to attribute hydro-geological data (i.e., transmissivity, specific yield, and crop consumptive use rates) to each well in a study area; evaluate the estimated impact to stream flows using the Jenkins method; and incorporate the Jenkins method into to delineation of regulatory boundaries (i.e., 28 percent depletion in 40 years) and to estimates surface flow depletions over time. This paper illustrates that GIS is an effective tool to estimate stream flow depletion, and to help water resources managers' in the decision-making processes. Jesse Bradley Nebraska DNR Integrated Management 301 Centennial Mall South Lincoln , NE 68509 US Phone: 402-471-0586 E-mail: jbradley@dnr.ne.gov |
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