摘要
雅鲁藏布江中上游,流域面积大,水文站点稀少,目前还无法进行有效的洪水作业预报。基于数字高程模型,利用Arc GIS软件中的水文分析功能,对该区域进行流域空间离散,通过生成流域流水网、划分流域子单元、建立产汇流分区、生成分区间拓扑关系等步骤,构建分布式洪水预报方案。针对雅鲁藏布江中上游的流域特性,选用新安江模降雨径流和马斯京根河道演算模型,对流域的水文过程进行模拟。结果表明,该预报方案能较好模拟流域重要站点的水文过程。
Due to large watershed area and lack of hydrological stations on the middle and upper reaches of the Yarlung Zangbo River, flood forecasting can＇ t be carried out effectively. Based on DEM, the paper uses hydrological analysis function of ArcGIS and makes watershed segmentation in this region. By generating drainage lines, dividing watershed sub-units and generating the topology relation between partitions, the distributed flood forecasting scheme is established. According to the watershed characteristics on the middle and upper reaches of the Yarlung Zangbo River, Xin＇ anjiang Model and Muskingum flood routing Model are applied to simulate hydrological process of the watershed. The results show that the forecasting scheme can better simulate hydrologic process of important stations.
出处
《水利信息化》
2015年第1期29-32,共4页
Water Resources Informatization
关键词
流域空间离散
分布式
洪水预报方案
Yarlung Zangbo River
watershed segmentation
distributed flood forecasting scheme
