基于DEM分析的引汉济渭工程受水区调蓄节点选址研究

DEM analysis based study on site-selection of regulation and storage works within water-receiving area of Hanjiang-to-Weihe River Water Diversion Project

就引汉济渭工程而言,由于关中受水区地势平坦,很难找到单一的大容量洼地修建调蓄工程,因此,需要采用分散式调蓄工程布置方案。本文在数字高程地形(DEM)数据分析的基础上,结合土地利用情况、下垫面条件以及调蓄节点与用水单元的空间关系,在受水区范围内优选了调蓄条件较好的地点25处,总共调蓄容量为1.37亿m3,可满足一般平水年份引汉济渭工程受水区的年调蓄容量要求。

So far as Hanjiang-to-Weihe River Water Diversion Project is concerned,it is quite difficult to find out a single depression with large capacity for constructing the regulation and storage works within the water receiving area in Guanzhong Region as the topography is flat therein,and then a scheme for a layout of decentralized regulation and storage works is necessary to be adopted. Based on the DEM( Digital Elevation Model) analysis,25 locations with better water regulation and storage conditions are optimally selected within the water-receiving area in accordance with the conditions of land utilization and underlying surface as well as the spatial relationship between the regulation and storage works and the water users therein; of which the total water regulation and storage capacity is about 0. 137 billion m3,thus the annual water regulation and storage demand from the water-receiving area in a normal year can be surely satisfied.