湖泊率是指区域（或流域）内湖泊的面积与区域（或流域）总面积之比。
这取决于水进入湖泊的速度，而这又取决于降雨量和蒸发率。
It depends on the rate at which water enters the lake, and that depends on the rainfall and the evaporation rate.
由于湖泊水位是由蒸发率和降水量控制的，对这种水位的解释是模糊不清的。
Since lake levels are controlled by rates of evaporation as well as by precipitation, the interpretation of such levels is ambiguous.
尽管发达国家的人口、工业产出和经济生产率还在飙升，但人们从含水层、河流和湖泊取水的速度已经放缓。
Although population, industrial output and economic productivity have continued to soar in developed nations, the rate at which people withdraw water from aquifers, rivers and lakes has slowed.
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