摘要
以吉太曲流域1∶10 000数字地形图生成的DEM数据为基础,利用Arc GIS10.0中的Hydrology模块,采用D8算法确定水流流向,设置汇流累计量的阈值为1 000,提取了流域有关水文信息。结果表明:1东、南、西三个方向为吉太曲流域的主要流向,西北方向所占比例最小,这与吉太曲流域整体地势由西北向东南倾斜相符;2汇流累计量阈值取1 000时,计算结果与吉太曲流域河网的实际情况最为类似;3对水流长度和流域边界进行计算后得出吉太曲的长度为76.764km,流域面积为2 109 km2,与官方数据相近。
As the basis of DEM digital elevation data of topographic map which scale is 1 ： 10 000, using the hydrology module of ArcGIS 10.0 D8 algorithm was used to determine the water flow and setting the amount of slip cumulative threshold of 1 000 to extract the basin for hydrological information. The results are as follows ： 1 ） east, south and west directions are the main flow of the river basin, north-west of minimum percentage, Jitaiqu basin as a whole and the terrain from the northwest to southeast line; 2）slip-cumulative threshold is 1 000, the river network results with the most similar situation ; 3 ） Jitaiqu calculated length is 76. 764 km, watershed area is 2 109 km2, and it is close to official data.
出处
《人民黄河》
CAS
北大核心
2015年第9期32-34,37,共4页
Yellow River
