滇东南岩溶石漠化信息提取研究

Research on Extraction of Karst Rocky Desertification Information in Southeastern Yunnan

文章以云南省马关县为研究区,基于岩溶石漠化与植被覆盖度和岩石裸露率之间的关系,采用像元二分模型计算出研究区的植被覆盖度和岩石裸露率信息,结合碳酸盐岩分布图和土地利用类型图,剔除非岩溶石漠化区域,加权叠加植被覆盖度和岩石裸露率数据,提取出试验区的岩溶石漠化信息,并且计算岩溶石漠化分级断点值,得到五个等级石漠化的分布情况和面积。试验表明,该方法可以快速、准确地提取研究区石漠化分布状况。

In this study, Maguan county of yunnan province was taken as the research area. Based on the relationship among karst rocky desertifieation and vegetation coverage and bare rocky ratio, the dimidiate pixel model was used to calculate vegetation coverage and bare rocky ratio information of the research area. The carbonate rocks distribution map and land use map were used to eliminate non-karst rocky desertification area, weighted the vegetation coverage and bare rocky ratio, extracted the karst rocky desertifieation information of test area, and calculated classification breakpoint value, get the distribution Of five grades rocky desertification and area. The experimental results show that the method ean quickly and accurately extract the distribution of karst rocky desertification in the study area.