water catchment area

基本解释

The widely used method for extracting the watershed channel network from digital elevation model (DEM), i. e. the water catchment area method, is presented.
总结了根据流域的数字高程模型（DEM）自动提取河网水系的集水面积方法。
The water catchment area of rain leader shall be determined based on whether the rainwater hopper and gutter are set up, and the calculation of water depth before the rainwater hopper.
雨水立管的汇水面积应结合是否安装雨水斗、是否设置天沟及斗前水深进行计算确定。
This paper describes the principles of ecotype hydraulic protection and related treatment techniques for gentle slope, steep slope, gully head, scouring gully, water catchment area and revetment.
文章阐述了生态型水工保护的原则，从缓坡、陡坡、沟头、冲沟、汇水塬、护坡、崾岘的处理等方面，介绍了生态型水工保护技术。