土壤侵蚀预报方程,如目前世界各国广泛采用的土壤流失量通用公式(USLE),一般都包含有降雨能量这一因素,而降雨能量是根据雨滴速度计算得到的。通常,人们从实测资料中获得停滞大气中的天然雨滴速度数据。这里介绍一种运用物体在静止流体中的沉降速度规律来计算的雨滴在停滞大气中降落速度的公式。 Soil erosion prediction equations, such as the commonly used generalized soil loss equations (USLE) in various countries all over the world, usually include rainfall energy, which is calculated based on the raindrop velocity. Normally, people get the natural raindrop velocity data in the stagnant atmosphere from the measured data. Here, a formula for calculating the landing speed of a raindrop in stagnant atmosphere by using the law of settling velocity of an object in a stationary fluid is presented.