drop of water level的意思|示意

When dripping end flow increased, surface pond radius around drop increased, the moving distance in level of water increased, but the in leakage depth of water in vertical decreased;

随滴头流量增大，滴头周围地表积水区半径增大，水分在土壤中的径向运移距离增大，竖向入渗水量减少。

By 1950, though, human activities had started to make an impact. Then, the water level began to drop at a rate of 30 centimeters (about a foot) each year.

到1950年，人类活动开始产生深远影响。那时，水平面开始以每年30厘米的速度下降。

The sea level stops in a high position for a long time, so both drop of water and current velocity are small.

并且由于海平面高度相对稳定在较高位置，河流纵比降较小，流速也较小。

In October, autumn falls on the plain areas in Hubei and Hunan. In Hubei, the water level of the lakes close to the Yangtze begins to drop.

十月，长江中游的两湖平原进入秋季，湖北省内临近长江的湖泊水位开始逐渐下降。

Then, the water level began to drop at a rate of 30 centimeters (about a foot) each year.

那时，水平面开始以每年30厘米的速度下降。

Some time in the coming decades, the shrinking of glaciers will cause a drop in the level of glacial runoff, reducing the supply of water to urban Chileans.

在未来几十年里的某个时候，冰山的消融会减少冰山径流，从而减少对智利城市居民的用水供应。