Model to Evaluate Feedlot Runoff Control Systems

A continuous simulation digital computer hydrologic model of feedlot runoff control and disposal has been developed at Kansas State University. The purpose of the model is to establish guidelines and design parameters for feedlot runoff control facilities which will meet the requirements of the Federal Water Pollution Control Act Amendments of 1972. The model continuously monitors the water budget of a feedlot-storage pond-irrigation disposal area control system using historic rainfall and temperature data. It uses only readily available climate, soil, and crop data so that it can be applied to all major livestock producing areas of the U.S. The model is described in detail and some preliminary results are presented for Kansas conditions. The model is expected to be useful in evaluating applications for permits to discharge and for 208 planning agencies in determining Best Management Practices for feedlots.