准噶尔盆地东部土壤风蚀敏感性分级及其区划研究

选取影响准东地区土壤风蚀的4个敏感性因子(风场强度、植被覆盖度、地形起伏度、土壤干燥度),结合GIS空间分析技术,将4个因子的敏感性划分为极敏感、高度敏感、中度敏感、低度敏感和不敏感5个等级,利用层次分析法(AHP)确定敏感性因子权重,最后确定准东地区土壤风蚀综合敏感性分级及其分布规律,并对准东地区进行区划研究。结果表明:准东地区土壤风蚀敏感性在空间分布上存在显著差异,总体呈现为北高南低,西高东低的分布态势;极敏感区、高度敏感区、中度敏感区、低度敏感区和不敏感区分别占准东地区总面积的15.27%、17.20%、22.66%、19.49%和25.38%。通过对准东地区土壤风蚀敏感性分级研究,并提出其分区保护与建设措施,以期为准东地区经济发展与环境保护提供科学参考。

Study on the sensitivity classification and regionalization of soil wind erosion in Zhundong Area

In this study, four sensitivity factors affecting the soil wind erosion of Zhundong area including wind energy intensity, vegetation coverage, relief degree of land surface and soil dryness were selected. Combining with GIS spatial analysis technique, the sensitivities of these factors were classified into five grades; extremely sensitive, highly sensitive, moderately sensitive, low sensitive and insensitive, and general analytic hierarchy process (AHP) was used to determine the sensitivity of the factor weight. Finally we determine Zhundong area comprehensive soil wind erosion sensitivity classification, distribution, and Zhundong area planning. The results showed that Zhundong area exist significant differences in the spatial distribution of soil wind erosion sensitivity, and the trend of wind erosion sensitivity in Zhundong area increased from east to west and from south to north; Extremely sensitive area, highly sensitive area, moderately sensitive area, low sensitive area and insensitive area occupied 15.27%, 17.20%, 22.66%, 17.20% and 25.38% of the total area, respectively. Some suggestions on the regional protection and construction were proposed. This study can provide a scientific reference for area economic development and environmental protection.