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通用土壤流失方程常被用来预报田间土壤流失量。当方程中所有因子均为已知或经过预先检验时,则其计算精度约为80％。该方程的使用有一定局限性,许多研究者已提出不少方法改善其使用及其精度。该方程尽管有其局限性,但仍是预报农田土壤流失量最有效的方法。 在通用土壤流失方程A=RKLSCP中,A是土壤流失量,R是降雨因子,K是土壤可蚀性因子,L是坡长因子,S是坡度因子,C是植被和管理因子,P是治理措施因子。L和S合并在一起,就是所谓的地形因子LS。在很多情况下,L和S可以很容易地在田间测到。 建立通用土壤流失方程时,认为坡度基本上是均匀一致的。实践中LS的估算仍然假定为均匀坡,即坡度不变,坡面平滑。如果坡面形状既不规
Common soil loss equations are often used to predict the amount of soil loss in the field. When all the factors in the equation are known or pre-tested, the calculation accuracy is about 80%. The use of this equation has its own limitations and many researchers have proposed many ways to improve its use and its accuracy. Despite its limitations, this equation is still the most efficient way to predict soil erosion in farmland. In the universal soil loss equation A = RKLSCP, A is the amount of soil loss, R is the rainfall factor, K is the soil erodibility factor, L is the slope length factor, S is the slope factor, C is the vegetation and management factor, P is the governance Measures factor. L and S together, is the so-called terrain factor LS. In many cases, L and S can be easily measured in the field. When establishing a generalized soil loss equation, the slope is considered to be essentially uniform. In practice, the estimation of LS still assumes a uniform slope, that is, the slope is constant and the slope is smooth. If the slope shape is not regular