Discussion On Methods Of Surface Rainfall Estimation And Its Effect On Hydrology Simulation

It is the basic request that average rainfall is ascertained by the known rainfall of drainage area in hydrology research and it touches the precision of flood forecast Regarding LongYan area in FuJian province as studying drainage area, at first , rainfall data in this area is detected and the data which missing measure or wrong measure is interpolated by different methods and then different interpolated results are compared Finally, comparatively integrated rainfall data is gained This is ready-made to the calculation of surface rainfall amount There are a lot of ways in the calculation of surface rainfall amount In this paper, relating to sizing grid and searching radius in grid calculating are gained by iterative calculation and its results are compared to the calculating results by Thiessen And spatial distribution of rainfall in the entire river basin is characterized by equivalence side which is protracted by the result using grid interpolation and Thiessen And it stand out the superiority of Grid In the paper, the effect on hydrology simulation among different methods of calculating surface rainfall amount along two small drainage area in LongYan area is analyzed from assured coefficient and the compare between the actual measuring flux and simulating flux And it is indicated that station distributing have an influence upon the choice of means of surface all amount calculation In two aspects of rainfall station density and spatial distribution of rainfall, it is discussed that rainfall asymmetry distribution impacts on hydrology simulation The grid method for the calculation of surface rainfall amount is a effective way Grid method is generalized in the calculation of surface rainfall amount...