Modeling on Influence of Land Leveling Precision on Basin Irrigation Performance

After validation with field irrigation experiment data, the one-dimensional surface irrigation model SRFR was used to model the influence of land-leveling precision on basin irrigation performance under conditions of fixed and varying water supply time. For a typical field, the resulting performance parameters, such as application efficiency and distribution uniformity were appreciably reduced with increase in the standard deviation of field surface elevations (S_d), which was used to evaluate the land-leveling precision. From this study, it can be inferred that the field leveling precision need be improved by means of laser-controlled leveling procedures in order to obtain reasonable use of irrigation water.