汇水面积指的是雨水流向同一山谷地面的受雨面积。跨越河流、山谷修筑道路时,必须建桥梁和涵洞。兴修水库必须筑坝拦水。而桥梁涵洞孔径的大小、水坝的设计位置与坝高、水库的蓄水量等都要根据这个地区的降水量和汇水面积来确定。
利用 GIS 方法建立了数字高程模型(DEM),研究了子汇水面积的边界。
By means of GIS method, the digital elevation model(DEM)is established, the subcatchment boundaries are studied.
摘要汇水面积和汇水量是多孔路面或透水路面设计的重要参数。
Abstract Catchment area and catchment rainfall are important parameters of porous or permeable pavement design.
鄂尔多斯盆地周边岩溶分布区由22个汇水面积不等的岩溶地下水子系统组成。
The karst groundwater system in Ordos basin consists of 22 sub-systems with various catchment sizes.
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