• 论文 •

### 分布式水文模拟汇流方法及应用

1. 1. 中国科学院地理科学与资源研究所陆地水循环及地表过程重点实验室,北京100101;
2. 武汉大学水资源与水电工程科学国家重点实验室,武汉430072
• 收稿日期:2003-07-13 修回日期:2003-10-20 出版日期:2004-04-15 发布日期:2004-04-15
• 作者简介:王纲胜(1978-),男,湖北鄂州人,中科院地理科学与资源研究所博士生,主要从事水文水资源研究。 E-mail:wanggs@igsnrr.ac.cn.
• 基金资助:

国家自然科学基金项目(50279049);中国科学院知识创新工程方向性及领域前沿项目(KZCX2SW317/CX10GE0108);中科院“百人计划”项目

### Flow routing method and its application in distributed hydrological modeling

WANG Gang-sheng1, XIA Jun1,2, NIU Cun-wen2

1. 1. Institute of Geographic Sciences and Natural Resources Research, CAS, Beijing 100101, China;
2. Wuhan University, Wuhan 430072, China
• Received:2003-07-13 Revised:2003-10-20 Online:2004-04-15 Published:2004-04-15

Abstract:

Flow routing model (FRM) plays important roles in the distributed hydrological modeling. Whether a simple or complex FRM is chosen depends on the relative relationship between the time resolution and the lagging time of routing. Generally, the FRM of a distributed hydrological model(DHM) consists of three components: the first is subdivision method of the basin; the second is the routing path; and the last is the routing method based on the routing path. In order to decrease the runtime of model, an efficient routing method, the so-called Ranked-Grid-based Kinematic Wave Routing model (RGKWR), is developed in this paper. This model applies the kinematic wave method to successive routing on ranked raster grids. Raster grids can be divided into different ranks due to each grid's flow direction computed by the single direction algorithm. We define the basin's outlet grids as the first rank, and the grids from which water flows into the first ranked grids as the second rank, the rest can be deduced by analogy, so the most upstream grids are defined as the highest rank. Flow routing is undertaken from those grids having higher rank onto the grids having lower rank.This paper puts forward the classifying method for raster grids, discusses the kinematic wave model and its numerical solutions, and carries out a case study on Chaobaihe River Basin in North China. The basin, with a drainage area of 13,846 km 2, has two outlets to Miyun Reservoir: one is Xiahui hydrologic station on Chaohe River, the other is Zhangjiafen station on Baihe River. The whole basin is divided into 55,444 grid elements at a 500-m resolution, with the Chaohe River basin partitioned into 298 ranks, and Baihe River basin 398 ranks. The application shows RGKWR based on GIS/DEM is reasonable and efficient.