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雨滴冲击是引起无覆盖保护地区土壤分散的主要能量来源,在薄层水流对泥沙的输移中,雨滴冲击起着重要作用。本文讨论的内容是雨滴在土壤侵蚀力学中的直接作用。 雨滴的特征 雨滴大小大约可从直径为7.0mm到小至雾状的细雨。大多数降雨可根据雨滴的体积采用一个正规的雨滴大小分布来描述。雨滴中数直径D_(50),即降雨中所有大于这一直径的大雨滴的总体积,等于所有小于这一直径的小雨滴的总体积时所对应的雨滴直径,我们用它来描述降雨。雨滴中数直径同雨强的关系式如下:
Raindrop impact is the main energy source that causes the soil to disperse in the uncovered protected area. Raindrop impact plays an important role in the transport of sediment by thin-bedded water flow. This article discusses the direct effects of raindrops on soil erosion mechanics. Characteristics of raindrops The raindrop size can vary from about 7.0mm in diameter to as little as a mist. Most of the rainfall can be described by a normal raindrop size distribution based on the volume of the raindrops. The diameter of the raindrop D 50, which is the total volume of all the raindrops larger than this diameter in the raindrop, is equal to the raindrop diameter of all the raindrops smaller than this diameter. We use it to describe the rainfall. The relationship between the number of raindrops and the diameter of the rain is as follows: