地质时期黄土高原土壤侵蚀系统初步分析

A Preliminary Analysis on Soil Erosion System ofthe Loess Plateau in Geological Age

本文采用地球系统的观点对地质时期土壤侵蚀系统的结构和特征进行了系统分析；并基于地质时期古生态环境的恢复，结合现代土壤侵蚀机理，对地质时期土壤侵蚀的发展过程进行了初步分析。认为土壤侵蚀系统是一个复杂的非线性系统；地质时期强烈土壤侵蚀发生在沉积期向成壤期转变的过渡时期；次强烈侵蚀期发生在成壤期向沉积期转变的时期；而沉积期间和成壤期间的土壤侵蚀相对微弱。

The construct and features of soil erosion system in geological age have been systemticaly analysed by using the viewpoint of the earth system. Based on the ancient ecological systemrecoved in geologic age and on combined modern soil erosion mechanism,the developing process ofsoil erosion in geological period have been discussed. It was regarded that the soil erosion systemis complicate and nonlinear system.The most extensive soil erosion in geological period happenedin transition period from the deposit period to soil forming period. The second extensive soil erosion period happened from the soil formed period to the deposit period,the soil erosion was relatively weak during the deposit period and the formed soil period.