يك مدل رياضي براي پيش بيني ظرفيت نفوذ خاك در وضعيت آبياري باراني

A mathematical model to predict soil infiltration capacity under sprinkler irrigation conditions

Soil infiltration capacity is one of the main important factors to design soil and water projects such as irrigation and drainage systems. Both maximum sprinkling application rate and irrigation scheduling are frequently based on soil infiltration and final infiltration capacity. Although soil infiltration capacities of different parts of a field are not the same, the final soil infiltration capacity should be estimated carefully using an adapted method to sprinkler irrigation to avoid runoff and erosion in order to achieve high irrigation efficiency. In this paper a physical-mathematical model was used to predict soil infiltration capacity under sprinkler irrigation conditions. The results showed good agreements (r2-96-98%) between measured and predicted infiltration capacities on both basin and tin-row experimental plots. Final soil infiltration capacity and capillary drive could also be predicted using the model for two different times of ponding at different application rates.