基于变异系数法的贵州省石漠化驱动力研究

Study on the Driving Forces of Rocky Desertification in Guizhou Province Based on Variation Coefficient Method

[目的]对贵州省石漠化驱动力进行研究。[方法]基于GIS与RS技术,采用相关分析、变异系数及加权平均法,分析了贵州省石漠化的主要驱动因子,并对贵州省石漠化分布进行综合评价。[结果]贵州省石漠化的主要驱动因子为植被覆盖、降水、农民收入、坡度,均与石漠化呈显著相关;从石漠化的理论分布来看,黔西南、毕节、黔南以及黔东北的石漠化最严重,其中毕节地区石漠化理论值要高于现状,说明毕节生态功能区的建设有效遏制了石漠化的发展;石漠化理论分布与现状分布有很大的一致性,说明该研究方法是可行的。[结论]该研究可为石漠化的现实防治提供理论依据。

[Objective] The aim was to study the driving forces of rocky desertification in Guizhou Province.[Method] Based on GIS and RS technology,the main driving forces of rocky desertification in Guizhou Province were analyzed by means of correlation analysis and variation coefficient method,and then the distribution of rocky desertification in Guizhou Province was assessed synthetically.[Result] The main driving forces of rocky desertification in Guizhou Province were vegetation cover,rainfall,peasant income and gradient which were obviously correlative with rocky desertification;from the theoretical distribution of rocky desertification,rocky desertification was the severest in southwest Guizhou,Bijie,southern Guizhou and northeastern Guizhou,and the theoretical rocky desertification in Bijie was severer than current situation,which showed that the construction of ecological function area in Bijie restrained the development of rocky desertification effectively;the good consistency between theoretical and current distribution of rocky desertification revealed that our study method was feasible.[Conclusion] The study could provide theoretical references for the practical control of rocky desertification.