Distributed simulation of hydrological response to water and soil conservation measures

The original Topmodel is modified properly and the soil and water conservation topography index conception is given to simulate the hydrological response to water and soil conservation measures. At the same time, the vegetation index is used to take into account the difference of the vegetation canopy interception. The modified model is calibrated with five years daily rainfall and runoff records (1992～1997). The daily runoff data is used to simulate the five situations, that is, the original state, the states with the terrace measure, the grass measure, the fruit forestry measure and the water and soil conservation forest measure in the upstream of Qingjiang station in Xiuhe basin, the modified model gives a sound result.