Quantitative study on soil factor of water erosion in macroscopic regions is generally done by establishing the mathematical models.In view of various shortages existing in quantiative moedls of soil factor developed.It is necessary to build up new nationwide matematical models of soil factor for the comparison of soil erodibility among the regions.Two problems of the establishment and application of Soil Index Models are discussed in the article. The steps of the models establishment are as follows: 1. D...
修改评论