基于DEM 的数字降水径流模型在黄河小花间的应用
收稿日期: 2002-05-10
修回日期: 2002-09-07
网络出版日期: 2002-11-25
基金资助
国家重点基础研究发展规划项目(19990436-01)
Digital Rainfall-Runoff Model Based on DEM: The Application to Xiaolangdi-Huayuankou Section of the Yellow River Basin
Received date: 2002-05-10
Revised date: 2002-09-07
Online published: 2002-11-25
Supported by
The National Key Basic Research Project of China, No.19990436-01
吴险峰,王中根,刘昌明,刘晓伟 . 基于DEM 的数字降水径流模型在黄河小花间的应用[J]. 地理学报, 2002 , 57(6) : 671 -678 . DOI: 10.11821/xb200206006
DEM is the main data source which is used in watershed analysis. There are many mature algorithms in watershed analysis and they can be used to delineate the drainage networks. Applications of the methods based on DEM make significant innovation in hydrological simulations. Topographic parameters which are used in hydrological models can be automatically calculated from DEM. The article introduces the main process to determine watershed geometry, drainage network and other map-type information for hydrological models. Lushi basin, located in the upper Luohe river which is a tributary of the middle Yellow River, was selected as the study region with an area of 4,623 km2. WMS6.1, a GIS hydrological tool, which is introduced to China recently, was used to develop the digital rainfall-runoff model, and other GIS tools such as ARC/Info, Arcview were also used to deal with the data. The drainage network was derived from 1:250,000 DEM, and the region was divided into seven sub-basins. HEC-1 model, a part of hydrological models in WMS, was selected to simulate the rainfall-runoff process. Curve Numbers (CNs) and other parameters were automatically calculated to input to models directly. Five historical flood events were simulated. The results demonstrate that the method was more efficient than trade method. Although it is very easy and quick to input and output data for the models, it does not mean that the hydrological model itself has high quality, so it is necessary to develop hydrological models which can be adapted to the region.
Key words： watershed hydrological model; GIS; DEM; WMS; digital hydrology; Xiaolangdi-Huayuankou section
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