|Bonta, James - Jim|
Submitted to: Meeting Abstract
Publication Type: Abstract Only
Publication Acceptance Date: 10/17/2000
Publication Date: N/A
Citation: Interpretive Summary:
Technical Abstract: Estimates of ground-water recharge are often needed for a variety of ground-water-resource evaluation purposes. A method for estimating long-term average annual ground-water recharge and actual evapotranspiration not known in the English literature is presented. The method uses long-term average annual precipitation, runoff, potential evaporation, and crop-yield information, and uses empirical parameter curves that depend on soil and crop types to determine long-term average annual ground-water recharge (GWR). A simple soil parameter characterizes the effects of soil on the evapotranspiration and drainage processes in the method. The method is developed in an empirical and theoretical framework. It was tested using historic lysimeter records from lysimeters at the North Appalachian Experimental Watershed at Coshocton, Ohio. Considering the coarse information required, the method provides good estimates of ground-water recharge and actual evapotranspiration, and is sensitive to a range of cropping and land-use conditions. The method can be used for urban and agricultural areas, and can be incorporated into a geographic information system (GIS) framework for rapid, large-area, spatially-distributed estimations of GWR. Other research conducted on the method has resulted in refinements to estimate long-term average monthly GWR. Ideas for further research on the technique are presented.