关键词: 土壤可蚀性, 诺谟公式, EPIC模型, 土壤侵蚀, 南方红壤区

Abstract: Soil erodibility directly affects the soil erosion prediction accuracy. This paper studies soil erodibility of western and southern Anhui Province by using the measured data of runoff plots. Then the EPIC model and nomo-formula are verified. It is showed that the difference of soil erodibility in western and southern Anhui Province is great. The measured values of soil erodibility differ with soil types, with range of 0.013-0.043 t·hm2·h/(MJ·mm·hm2). The erodibility value of the red soil is 3.3 times of the yellow brown soil. The estimated values of soil erodibility vary greatly for the same soil type by using different methods. It is difficult to choose the appropriate method for estimating soil erodibility without measured data verification. The soil erodibility value estimated by the EPIC model and the nomo-formula are much higher than the measured values. The results provide basic data and technical support for the soil erosion prediction, which is of great significance to the protection of land resources and the ecological construction of soil and water conservation in the region.

Key words: soil erodibility, nomo-formula, EPIC model, soil erosion, red soil area of southern China