摘要
利用前人对石漠化形成机制和驱动力分析研究的成果,选取岩性、坡度、土地覆被类型、植被覆盖度、基岩裸露率5个关键因子。采用专家打分法对各因子进行等级划定与赋值,结合＂3S＂技术,将量化后的5个关键因子进行叠加计算,得出贵州省石漠化空间上呈现如下规律：石漠化分布面积大,类型多样,代表性强；石漠化空间分布不均,具有西部重、东部轻,南部重、北部较轻的宏观格局；石漠化程度严重,进一步发生石漠化的威胁极大；从时间上看,贵州省石漠化在2000～2005年间处于恶化阶段,到了2005～2010年间,恶化趋势得以控制并开始转变,进入优化阶段。
By using the results of forming mechanism and driving forces of desertification in previous research,this paper chose the lithology,slop degree,land cover type,vegetation coverage degree and the rate of exposure rock to map and discover the Guizhou karst desertification. This study further adopt the expert scoring method to value and classify the factors,combined with the 3S method to quantify five key factors to over lay calculate. The results revealed that the spatial regulations of desertification in Guizhou province are： very large area of desertification,big amount of variations,significant;Uneven in spatial distribution that is serious in the west,slight in the east,serious in the south and slight in the north; the degree of desertification is serious and could become more serious in the next step; from the time series,the desertification in Guizhou went bad from 2000 ot 2005,and changed to be better from 2005 to 2010.
出处
《贵州师范大学学报（自然科学版）》
CAS
2014年第3期10-15,46,共7页
Journal of Guizhou Normal University：Natural Sciences
基金
国家自然科学基金项目(编号:41161002)
贵州省重点攻关项目(编号:20073017)
关键词
贵州省
喀斯特
石漠化
GIS
时空特征
Guizhou province
karst
rocky desertification
GIS
spatial-temporal
