基于栅格式SCS模型的分布式水文模型研究  

A raster-based distributed hydrological model using SCS model

作　　者：罗鹏[1] 宋星原[1] 

机构地区：[1]武汉大学水资源与水电工程科学国家重点实验室,湖北武汉430072

出　　处：《武汉大学学报（工学版）》2011年第2期156-160,共5页Engineering Journal of Wuhan University

基　　金：国家自然科学基金项目(编号:51079099)

摘　　要：利用基于栅格分布的土地利用类型和土壤类型,通过将SCS模型改进为栅格式的SCS模型,并结合栅格式Clark单位线汇流方法,构建了一个具有松散耦合型分布式水文模型.该模型结构简单,模型参数较少,所需流域特性资料容易获取,对流域具有较强的适应性,并可以获得流域栅格分布式的产流结果.本研究将该模型应用到欧阳海流域上,构建洪水预报模型进行场次洪水过程模拟,并与新安江模型模拟结果进行对比.模拟结果表明,所构建的松散结构分布式水文模型具有较高的模拟精度,能够应用到实际的洪水预报中.By using the land-use and soil-type raster data and by improving the original SCS model to Raster-based SCS model,together with the use of the raster-based Clark＇s unit hydrograph,a raster-based distributed hydrological model is built.The new model is relatively simple in its structure and few in its number of parameters.It has a strong adaptability,whose geographic information needed is easy to get;and it can have a raster-distributed runoff result of the watershed.The new model is applied to the flood forecasting of the Ouyanghai Basin.What＇s more,a comparison between the simulation result and the Xin＇anjang model result is also made.The simulation result shows that the raster-based distributed hydrological model is of a higher simulation precision,and can be used in the real flood forecasting.

关 键 词：SCS模型 Clark单位线 土地利用类型 土壤类型 分布式水文模型 

分 类 号：P338.1[天文地球—水文科学]