Mapping study,“1: 15 000 000 Soil
Erosion Map of China”and“1:15 000 000 Soiland Water
Conservation Map of China”,has been
carried out,in which almost all investiga-tion data published on soil erosion and conservtion in China since the founding of PRC wereintegrated,therefore a sketch classification system of soil erosion and
conservation were sug-gested,and the method of soil erosion harmftilness evaluation was put forward. The studyshows:1.there are not only various types of soil erosion in China ,but also with severely in-tensity and harmfulness to industry and agriculture;2.the geographical differentiation of ero-sion is distinctly and clearly-there are three erosion regions,i.e. the east China water erosionregion,the northwest China wind erosion
region,Tibetan plateau freeze-thraw erosion re-gion. And seven sub-regioris and twenty-five areas of soil erosion were identified according tothe erosion types and its geo-compound,the small scale plan of soil and water conservation ofChina is as follows :the key regions of erosion which have to be controlled in China is in theeast China because of the dense population and important human geographical location-thecentre of China politics,culture,and economics. In some areas of region,such as the loessplateau,the northwest China undulating hills,thenorth China Mts. and hills,Sichuan basinwith purle soil,the south Yangtze R. hills,the southwest China landslide and mud-rock activebelt and so on,should be paid more attention to and controlled immediately. As for the west,the key region is located in oasis,and the basin of Yarlungzangbo river.