不同填洼结果下TOP MDODEL在流域径流模拟中的应用比较研究  

A Comparitive Study of Simulated Runoff by TOPMODEL Using DEM Data From Two Different Pit-filling Results

作　　者：程进强[1] 熊立华[1] 朱凤霞[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：《石河子大学学报（自然科学版）》2006年第6期749-754,共6页Journal of Shihezi University(Natural Science)

基　　金：国家自然科学基金(50409008);教育部新世纪优秀人才支持计划(NCET-05-0624);霍英东青年教师基金(101077)

摘　　要：湿度指数是TOPMODEL的重要输入。从数字高程模型(DEM)中提取湿度指数之前需对DEM进行洼地处理。大多数填洼方法在对洼地处理后一般存在平坦区,在确定性最陡坡度法下平坦区栅格水流将很难进行流量分配,此类填洼本文称之为不完全填洼。为了使整个流域的水量在流域出口点达到平衡,本文提出了一种完全填洼方法,讨论了完全填洼和不完全填洼下集水面积、坡度、湿度指数的空间分布,比较了二种填洼结果下TOPMODEL在牧马河流域径流模拟中的应用。模拟结果表明,完全填洼和不完全填洼下TOPMODEL模拟的的径流过程区别不大。Wetness index is an important input to Topmodel. Before extracting the wetness index from Digital Elevation MedeI（DEM） ,we have to treat pits existed in the DEM data,which is called pit-filling. For the result of most pit-filling methods, there are normally flat areas present at DEM data, which raises difficulty of distribution of flowing in flat DEM cells under the Single Direction mthod, such pit-filling methods named partly-filling in this passage. In order to balance the catchment flowing at basin outlet, a fully-filling method is posed here. In the paper, it first introduced a fully-filling method, then analysed the eharaeteristies of the spatial distribution for the contributing area, slope and wetness index under the two pit-filling resuts,at last,comparedthe simulated runoff with topmodel in Mumahe river basin.And the result shows that simulated runoff in the fully-filling is almost the same as in the partly-filling method.

关 键 词：完全填洼 不完全填洼 湿度指数 径流模拟 

分 类 号：P333.1[天文地球—水文科学]