在国内外,对一个地区水资源丰富程度,几乎无一例外地要用径流量、径流深等指标来衡量。径流量表示水资源的绝对数量,一个地区径流量愈大,表明它拥有的绝对水量就愈多,水资源就愈丰富。但衡量一个地区水资源是否丰富光看它的绝对水量 At home and abroad, the abundance of water resources in a region is almost always measured by indicators of runoff and runoff depth. Runoff represents the absolute amount of water resources. The larger the runoff in a region, the more absolute water it has and the more abundant it is. But measuring the abundance of water in a region simply looks at its absolute amount of water