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土地沙漠化是在干旱、半干旱地区,由于特定的自然条件和人类不合理地利用自然资源,所引起的环境退化过程。随着这个过程的进一步发展对人类的不利影响越来越大。因此,对土地沙漠化的问题,也越来越得到人们的普遍重视。 在内蒙伊克昭盟及宁夏、陕北地区,沙漠化的土地面积,分别占总土地面积的32％、25.2％和45.9％。这说明了在上述地区土地沙漠化是相当严重的。 造成土地沙漠化的自然因素,除气候的干旱、多风外,地表物质的组成是其物质基础。而地表物质组成与沉积条件密切相关,因此,不同的沉积环境形成不同的沉积物,其质地性质差异很大。这些不同的沉积物,对土地沙漠化的发生及发展速度、类型和治理措施都有直接关系。因此,研究地表物质组成与土地沙漠化之间的关系是极为重要。
Land desertification is a process of environmental degradation caused by arid natural conditions in arid and semi-arid areas due to specific natural conditions and unreasonable human use of natural resources. With the further development of this process, the adverse impact on human beings is growing. Therefore, the problem of desertification of land is also getting more and more universal attention. In Inner Mongolia Yikezhao League and Ningxia, northern Shaanxi, desertification of land area, respectively, the total land area of 32%, 25.2% and 45.9%. This shows that the desertification of land in these areas is quite serious. Natural factors contributing to the desertification of the land, in addition to the climate of drought, windy, the composition of surface material is its material basis. The composition of the surface material is closely related to the sedimentary conditions. Therefore, different sedimentary environments form different sediments, and their texture properties vary greatly. These different sediments are directly related to the occurrence, development speed, types and control measures of land desertification. Therefore, it is extremely important to study the relationship between the composition of surface materials and the desertification of the land.