基于栅格的分布式水文模型应用研究  

Study on Grid-Based Distributed Hydrological Model

作　　者：沈洁[1] 李致家[2] 张鹏程 

机构地区：[1]黄河勘测规划设计有限公司,河南郑州450003 [2]河海大学水文水资源学院,江苏南京210098 [3]宁夏瑞沃水资源工程研究院,宁夏银川750021

出　　处：《人民黄河》2014年第6期47-50,121,共5页Yellow River

基　　金：国家自然科学基金资助项目(41130639;51179045;41101017)

摘　　要：基于DEM的分布式水文模型是数字化时代水文模型发展的主要方向。笔者在DEM的基础上,GIS软件的支持下,采用基于连续栅格单元演算的分布式水文模型CASC2D,对半干旱地区三关口流域和典型湿润地区呈村流域进行洪水模拟。由于模型采用的是超渗产流模式,适用于半干旱半湿润地区,因此在半干旱地区的三关口流域模拟效果较好;而对于典型湿润地区的呈村流域,产流机制为蓄满产流,模拟的洪峰流量及洪量较实测数据偏小。Distributed hydrolofical model based on DEM is the main direction of the development of hydrolofical model in difital afe. CASC2D is a distributed hydrolofical model which is based on frid unit has been chosen. On the basis of DEM and with the support of GIS software,the model was implemented in semi-humid Sanfuankou watershed and typical humid Chenfcun watershed for hydrolofical process simulations. The model utilized a super-infiltratinf runoff mechanism which was suitable for semi-arid and semi-humid refions. So it can be used to semi-humid Sanfuankou watershed with relatively hifh accuracy. While the results of simulation in typical humid Chenfcun watershed are not food for its runoff mechanism is super-infiltratinf runoff. In lifht of the results,the uncertainty coefficient of simulated flood is very hifh,but without the supply of subsurface flow and froundwater runoff,the flood peak and flood volume are smaller than that of the measured data.

关 键 词：分布式水文模型 CASC2D模型 洪水模拟 

分 类 号：P333[天文地球—水文科学]