Evaluation and comparison of Infiltration Methods in the Catchment Area of Mond River - Dashti Township by Use Double Ring Tests

One of the Catchment Area has it، s own parameters according in infiltration to its continent and soil (soil structure، vegetation complex، pore space). In this research، the shores of eternal rivers of Boshehr studied Mond River – Dashti Township. In this research، with special lattice and digging 60 well، the infiltration of water to soil measured by double ring outdoor test method and by three repetitions to control and determining the equation and computing equations coefficient of infiltration. By computing soft ware''s، the rate of infiltration and aggregation infiltration curves depicted and the equations appointed. The computer programs in visual basic language is written in order to determine the equation coefficients that showed the lowest and the minimum standard error (S2) toward the given curves، for 8 models. In this research best coefficient of these models with minimal errors for case studied Catchment Area was chosen. Those programs best coefficients of these experiment-adjusted models with arising errors; by inserting various coefficients models Philip، Kostyakov and SCS، and in regularity are better than Kostyakov-Lowece، Green-Ampt، Overton، Horton and Hall models.