Small cloud depth, low cloud top height, inhomogeneous structure are the main characteristics of the precipitation cloud.
云层厚度小、云顶高度低、云系结构不均匀是此次降水云系的主要特点。
The depth of ground water was greatly influenced by topography, precipitation and forest type.
潜水埋深受地形、降水和林分影响较大。
It is necessery that the total consumptive use of water in the rotation period is equal to the total effective precipitation(pre- cipitation minus runoff depth)in the loess hilly region.
在黄土丘陵区要求林草与农作物地在轮作周期内的总耗水量与有效雨量（降雨量与径流深之差）持平。
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