Ecology, Environment and Conservation Paper

THE EFFECT OF THE WATER INFILTRATION MODELS ON OUTPUT HYDROGRAPH

Saeid Shabanlou

Abstract

A comparison was made using the HEC-HMS hydrological model which is a software program used to simulate the rainfall-runoff phenomenon. By changing the infiltration models which are as follows: Green & Ampt, initial/constant, SCS Curve No. and deficit/constant separately; the rainfall-runoff as a phenomenon was simulated in the basin of the Golestan province and the results of this simulation study were compared to each infiltration model. Therefore, it was indicated that the simulated runoff hydrograph with the deficit/ constant model in comparison to the rest of the models has got a better conformity to the observe hydrographand right after that successively the initial/constant , the Green & Ampt and the SCS Curve No are in the next grades.