4.5 Pre-processing

Pre-processing module is the most complicated part in the hydrologicalmodeling process (Figure 4-3)，including： ①the general hydrological analysis sub-module based on DEM，containing calculations of flow direction，flow accumulation，flow length，slope and digital river networks extractionetc.; ②calculation of various runoff generation parameters，including parameters related to soil physical properties and parameters related to land cover andterrain; ③calculation of various confluence parameters，including parametersrelated to unit characteristics and channel characteristics; ④spatial interpolation of meteorological data，including several kinds of spatial interpolation algorithms.During the development of hydrological modeling system，difficulties in the process of di ......     （共4696字）    [阅读本文]>>