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基于矢量糙率的栅格单元流量分配模型
引用本文:ZHANG Sheng-tang,康绍忠.基于矢量糙率的栅格单元流量分配模型[J].水利学报,2005,36(11):1326-1330.
作者姓名:ZHANG Sheng-tang  康绍忠
作者单位:1. 西北农林科技大学,旱区农业水土工程教育部重点实验室,陕西,杨凌,712100;山东科技大学,山东,青岛,266510
2. 西北农林科技大学,旱区农业水土工程教育部重点实验室,陕西,杨凌,712100;中国农业大学,中国农业水问题研究中心,北京,100083
基金项目:国家自然科学基金重点项目(50339030)
摘    要:本文认为地表径流在汇流过程中由于流域坡面上地质层理走向、人类耕作活动、天然植被分布等一系列影响使坡面不同方向上具有不同的曼宁糙率系数取值,从而对栅格单元内地表径流向下游各栅格单元的流量分配产生影响,基于这一认识本文提出矢量糙率的概念,并在分析以往模型的基础上,利用一维圣维南运动波方程结合曼宁方程建立了考虑糙率因素的栅格单元间地表径流流向及流量分配模型.经试验流域应用检验,该模型能更精确地模拟降雨径流过程.

关 键 词:糙率  分布式水文模型  地表径流
文章编号:0559-9350(2005)11-1326-05
收稿时间:2004-12-09
修稿时间:2004年12月9日

Grid cell runoff distribution model based on vector roughness
ZHANG Sheng-tang,KANG Shao-zhong.Grid cell runoff distribution model based on vector roughness[J].Journal of Hydraulic Engineering,2005,36(11):1326-1330.
Authors:ZHANG Sheng-tang  KANG Shao-zhong
Abstract:Roughness because of the geologi has great effect on velocity of cal lammination, human activity of overland runoff in different directions are not the overland runoff and varies in different directions and vegetation distribution. Thus, the flow velocities same. Moreover, the roughness affects the runoff distribution when a grid cell discharges runoff towards its downstream grid cells. On this theory, the vector roughness was suggested as a new concept in this paper. A new overland runoff distribution model based on vector roughness was derived from 1-D Saint-Venant equation and Manning formula. The new model was used to calculate the flow in an experimental basin. The result indicates that the model can simulate the precipitation-runoff process more precisely than the multi-direction model.
Keywords:vector roughness  directional characteristics  distributed hydrological model  overland runoff
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