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降雨是造成我国东南部土壤侵蚀的主导因子,风化花岗岩又是南方土壤侵蚀的重要组成部分。本文通过在风化花岗岩侵蚀区的塘背小流域。选择了两个自然坡面径流小区,对观测的降雨量、降雨强度和土壤侵蚀量等三个因子进行了系统的分析,找出了月土壤侵蚀量在一年内呈双峰曲线的分布规律,建立了降雨量、降雨强度和土壤侵蚀量三因子幂函数的预测预报方程,为同类地区的水利、水土保持工程设计,农田基本建设以及治理和利用花岗岩侵蚀土壤提供了科学依据。
Rainfall is the dominant factor that causes soil erosion in southeastern China, and weathered granite is an important component of soil erosion in the south. This article passes through the Tang dorset valley in the weathered granite erosion area. Two natural slope runoff plots were selected to systematically analyze the observed rainfall, rainfall intensity and soil erosion. The distribution of monthly soil erosion was found to be bimodal within one year. The prediction and forecasting equations of rainfall, rainfall intensity and soil erosion amount by three factors power function are established, which provide a scientific basis for water resources, soil and water conservation engineering design, farmland capital construction and soil erosion and treatment of granite in the same area.