子流域划分对EasyDHM径流模拟的影响分析  

Influence of sub-basin delineation on runoff simulation by EasyDHM

作　　者：黄晓敏[1] 杨元月 张奇[3] 雷晓辉[4] 

机构地区：[1]东华大学环境科学与工程学院,上海201620 [2]南水北调工程设计管理中心,北京100038 [3]北京市水利规划设计研究院,北京100038 [4]中国水利水电科学研究院水资源研究所,北京100038

出　　处：《人民长江》2013年第9期15-19,共5页Yangtze River

基　　金：水利部公益性行业科研专项经费项目(201001024;201101026)

摘　　要：子流域划分是分布式水文模型构建的重要过程之一。对分布式水文模型子流域划分技术进行了综述,简要介绍了EasyDHM(Easy Distributed Hydrological Model)模型及其子流域划分方法。选取第二松花江丰满水库以上流域作为研究区域,使用1 km×1 km分辨率的数字高程(DEM)及50 km2集水面积阈值提取数字河网,并按3种子流域划分配置对该区域进行划分。结果表明,子流域划分数越多,纳什效率系数越大,模拟效果越好。Sub - basin delineation is one of the most important steps in distributed hydrological model establishment. We re- viewed the sub - basin delineation technology of distributed hydrological models, and introduced the easy distributed hydrological model （EasyDHM） and its sub - basin delineation method. The Second Songhua River above Fengman Reservoir was selected as study area, DEM resolution with 1 km ~ 1 km and water catchment threshold value of 50 km2 were used to extract the digital river networks. Three different configurations for sub - basin delineation were adopted. The results show that with the increase of sub -basins, the Nash -Sutcliffe coefficient increases, and the simulation accuracy is improved.

关 键 词：子流域划分 分布式水文模型 EasyDHM 径流模拟 第二松花江 

分 类 号：P334.92[天文地球—水文科学]