Evaluation and comparison of Three Infiltration Methods in the Tow Catchment Area of in boshehr state by Use Double Ring Tests

One of the Catchment Areas has its 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 and Bahoosh River – Tangestan Township). In this research, with special lattice and digging 120 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 wares, 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 Kostiakov and Philip and SCS 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; According to conclusions; SCS in compare Philip and kostiakov has less error in bahoosh Catchment Area. philip models is near to mond Catchment Area in compare kostiakov and SCS models.