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土壤流失方程(又称土壤通用流失预报方程)提出以来,引起了许多国家的重视,美国和亚非一些国家建立了各自国家或地区性流失方程式。近年来,我国在这方面也做了一些工作,积累了一些资料。下面介绍根据实测资料求花岗岩严重流失区的土壤可蚀性因子(K)的一个实例。讨论地区选取安徽省岳西县、连云公社附近地区,面积约三平方公里,土质为花岗岩母质的黄棕壤。这里地处北亚热带,年雨量约1400—1500毫米,雨量集中六、七、八三个月,降雨占年雨量的60—70％,夏季多降暴雨。这里为低山丘陵区,地面坡度20°—30°。地
Since the proposal of soil loss equation (also known as universal soil loss prediction equation), it has aroused the attention of many countries. Some countries in the United States and other Asian and African countries have established their own national or regional equation of loss. In recent years, our country has also done some work in this respect and accumulated some information. The following describes an example of calculating the soil erodibility factor (K) based on the measured data for areas of severe granite loss. Discussion area Select Yuexi County, Anhui Province, near Lianyun commune, an area of about three square kilometers, the soil is the yellow brown soil of granite parent material. Here is located in the northern subtropics, annual rainfall of about 1400-1500 mm, rainfall concentrated six, seven, eight three months, rainfall accounts for 60-70% of annual rainfall, more heavy rains in summer. Here is a hilly area, the ground slope of 20 ° -30 °. Ground