Correlations of Estimated Pumpage from the Ogallala Aquifer with Modeled Crop Water Requirements in the Texas High Plains

摘要

The water requirements of the major crops in the 40 counties of the Texas High Plains overlying the Ogallala Aquifer were determined with the Blaney-Criddle model for 1979 and 1980. Input data for the model consisted of monthly temperatures and precipitation from climatological records and irrigated crop acreages by crop for each county. These modelled irrigation water requirements, after effective rainfall was taken into account, showed a high positive correlation with estimates of irrigated acreage and amount of water applied for each county for 1979 and 1980.