坡面林地土壤流失系统动力学模型研究

A Study on the System Dynamics Model of Soil Loss on the Slope Forest Stand

根据土壤保持原理和系统工程理论及方法，在研究地区坡面林地土壤流失监测资料研究基础上，建立了坡面林地土壤流失系统动力学模型，利用计算机技术，依据系统内各因子行为模拟土壤流失系统状态。该模型可用于长江三峡地区花岗岩坡面不同林地的土壤流失过程、土壤水分下渗和地表径流过程模拟。一般情况下土壤流失量预测相差在５％以下。

According to the principles of Soil and water conservation,and the theory and methods of system engineering,based on the study of monitor data of Soil loss on the forest stands of the slopes, a system dynamics model of soil loss is established.By the technology of computer and according to the behaviors of the factors in the soil loss system,the state of the soil loss system can be simulated using the established model.The model can be used in forecasting the process of soil loss,soil water infiltration and the runoff under different forest stands on granite mountain slopes of the middle reaches of the Yangtze River.The forecasting error of the amount of soil loss is generally bellow 5 per sent.