watershed boundary meaning in English

分水界
流域边界

( 2 ) the construction of the digital watershed . this study extracted watershed drainage network , set off sub - watersheds and made certain watershed boundary . and this study also extracted some parameters about hydrology and terrain based on dem
在数字高程模型( dem )的基础上，进行了流域河网的生成、子流域的划分以及流域边界的生成研究，并进行了与地形相关、具有水文学意义的部分参数的提取。
Dem has abundant information about terrain , and we can extract the watershed basic characters , which include land surface characters , drainage network et al based on gis , and also can make certain the watershed boundary and set off sub watersheds from dem , which provide the flat roof for digital hydrological simulation
数字高程模型( dem )存储了丰富的地形信息，通过gis可以提取流域的基本特征，包括下垫面特征、水系、河网等，并可以依据河网等级确定流域的边界，进行子流域的划分。为数字水文模拟提供了平台。