Forecast model for wetting front migration distanceunder furrow irrigation infiltration

In order to indicate influence factors and migration laws of wetting front under furrow irrigation infiltration. Based on indoor experiment under furrow irrigation infiltration of clay loam and sandy soil, effects of soil bulk density, water depth and initial soil water content on wetting front were analyzed. Linear functional relationship were set up between wetting front vertical and horizontal migration distance and square of infiltration time, wetting front horizontal migration distance and square of infiltration time. The forecast model of wetting front migration distance was set up with the factors such as soil bulk density, water depth and soil initial water content and was verified. The results showed that the model had high accuracy and could be used to forecast the wetting front migration distance under furrow irrigation infiltration, so the results can give reference for improving furrow irrigation technique.