Numerical simulation technique for routing precipitation-runoff in watershed
流域降雨径流路径的数字模拟技术

Hydrological analysis of precipitation runoff routing process in watershed is of very importance. Based on the grid system in GIS, the precipitation runoff routing was numerically simulated with the computer through a series of related data sets making use of DEM's function to provide topographic features. It makes overland flow in the spatial range of a watershed be traced with the correct hydrological sequence and the hydrological computation rank of the runoff path in the watershed be determined of a spatial range. This provides spatial analysis basis for the modeling research based on the precipitation runoff relation in the watershed. Finally the research achievement was applied in the Huangjiaercha small watershed, the simulation technique was verified to have a definite reliability and practicability.