Simplified Forms of Surface Runoff Estimation Method for Silt-­Loam Soils

Surface runoff, the amount of water that runs off a field after precipitation or irrigation, can occur from irrigated, rain-­fed, or dryland fields. Because it depends on numerous factors, runoff is a difficult variable to measure and/or quantify. However, when using a soil-­water balance approach to estimate crop water use or evapotranspiration (ET) and/or crop irrigation requirements (IR), this variable needs to be taken into account.