基于DEM的清水河分布式水文模型

doi:10.13826/j.cnki.cn65-1103/x.2007.03.010

Abstract

Abstract: Hydrological model is always one of the important means for deeply probing into the laws of water cycle and water resources evolvement. Nowadays the techniques of hydrological model trend to be integrated with GIS in order to utilize the functions of GIS data management space analysis and visualization; however the DEM is the basic data of GIS With the distributed hydrological model based on DEM becoming the hotspot in hydrology, it is necessary to develop some kinds of distributed hydrological model adapting to the character of northwest mountains where snowmelt water and precipitation are the main replenishment of runoff The papers on distributed hydrological model in Tarim basin, the biggest inland river in China are seldom seen In this paper the author selects the water system of Qingshui River in the Tarim basin as the study area adopts mechanism of mixed runoff-yield constructs runoff-producing model by the grid cell then sets the parameters for basin flow concentration based on the path of runoff and adopts isochrones to develop the distributed hydrological model combining snowmelt with precipitation after distributing parameters based on the data of $300\mathrm{m}\times 300\mathrm{m}$ taking effect of hysteresis into account. The results show that the simulated peak value is similar to that of observed in summer however they are different in spring and winter which indicates the character of northwest mountains that have the main replenishment of snowmelt and precipitation for runoff again. Therefore we can confirm that the model is feasible to the Tarim River basin of to some degree

Key words: distributed hydrological mode, DEM, snowmelt mixed replenishment, Qingshui River, Basin

CLC Number:

P334

DING Hu, CHEN Ya ning, LI Wei-hong, CHEN Ya peng. Distributed hydrological model based on DEM in Qingshui River Basin[J].Arid Land Geography, 2007, 30(3): 364-369.

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Distributed hydrological model based on DEM in Qingshui River Basin

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