The Study And Application On Pattern Of Project Construction In The Distributed Hydrology Simulation

With the development and popularization of GIS, RS and computer technology, it is possible to obtain and describe the spatial distributed information of the basin underlying surface. How to utilize these technologies with fully consideration of the spatial and temporal variability of basin underlying surface characteristics and establish a solution of distributed hydrological model is the basis of the basin hydrology simulation, which has impact on the entire process and the result of the reasonability and reliability.This article studied the process of HEC model system in the modeling solution construction and established a distributed hydrological modeling solution using the HEC-GeoHMS module and HEC-HMS model, made a simulation of the process of rainfall-runoff, and finally get a comprehensive understanding of the characteristics in the modeling solution construction. On this basis, this article introduced a set of basin distributed hydrology modeling solution construction ways in combination with Xin'anjiang hydrological model: with the basin deconstruction, make the basin discrete to the runoff yield and concentration areas, which considered and resolved the spatial variation of the basin underlying surface and the spatial distribution of the model parameters; with the entire basin analysis, resolve the runoff yield and concentration into the hydrological modeling division, which can complete a hydrological model coupling; with the basin topology reconstruction, establish a hydraulic connection in hydrological modeling divisions, which lays a foundation in the simulation solution construction.Through the actual application of the "Three Gorges Reservoir Station (Cuntan, Wulong) flow forecasting programming" project, results showed that the distributed hydrological modeling solution construction method based on the Xin'anjiang model is operational and has a strong practical.