Research on the semi-distributed monthly rainfall runoff model at the Lancang River basin based on DEM

Gang Liu; Rong Zhao; Jiping Liu; Qingpu Zhang

doi:10.1117/12.761938

25 July 2007 Research on the semi-distributed monthly rainfall runoff model at the Lancang River basin based on DEM

Gang Liu, Rong Zhao, Jiping Liu, Qingpu Zhang

Proceedings Volume 6753, Geoinformatics 2007: Geospatial Information Science; 67532D (2007) https://doi.org/10.1117/12.761938
Event: Geoinformatics 2007, 2007, Nanjing, China

Abstract

The Lancang River Basin is so narrow and its hydrological and meteorological information are so flexible. The Rainfall, evaporation, glacial melt water and groundwater affect the runoff whose replenishment forms changing notable with the season in different areas at the basin. Characters of different kind of distributed model and conceptual hydrological model are analyzed. A semi-distributed hydrological model of relation between monthly runoff and rainfall, temperate and soil type has been built in Changdu County based on Visual Basic and ArcObject. The way of discretization of distributed hydrological model was used in the model, and principles of conceptual model are taken into account. The sub-catchment of Changdu is divided into regular cells, and all kinds of hydrological and meteorological information and land use classes and slope extracted from 1:250000 digital elevation models are distributed in each cell. The model does not think of the rainfall-runoff hydro-physical process but use the conceptual model to simulate the whole contributes to the runoff of the area. The affection of evapotranspiration loss and underground water is taken into account at the same time. The spatial distribute characteristics of the monthly runoff in the area are simulated and analyzed with a few parameters.

Citation Download Citation

Gang Liu, Rong Zhao, Jiping Liu, and Qingpu Zhang "Research on the semi-distributed monthly rainfall runoff model at the Lancang River basin based on DEM", Proc. SPIE 6753, Geoinformatics 2007: Geospatial Information Science, 67532D (25 July 2007); https://doi.org/10.1117/12.761938

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