国土资源遥感2018，Vol.30Issue(2)：195-201,7.DOI:10.6046/gtzyyg.2018.02.26
基于像元二分法的盐池县植被覆盖度与地质灾害点时空格局分析
Spatial-temporal pattern analysis of the vegetation coverage and geological hazards in Yanchi County based on dimidiate pixel model
摘要
Abstract
Based on dimidiate pixel model and using Landsat TM/OLI remote sensing images of 4 periods in 25 years (1989-2014) and geological hazards investigation data, the authors analyzed the characteristics of vegetation spatial-temporal pattern in Yanchi County by GIS and discussed the relationship between vegetation coverage and geological hazards. The results showed that the vegetation coverage of study area took on the features of relatively high vegetation coverage in the east and relatively low vegetation coverage in the west. The average vegetation coverage was on the low side generally and presented the characteristics of increase - decrease -increase;correspondingly the vegetation appeared the repetitive process of restoration -degeneration -restoration but had a tendency of recovery as a whole, with restoration distributed in the southeast and northwest and degeneration in the mid-west. Geological hazards point density was high in the south and low in the north,which suggests that the hazards points were concentrated in the south and dispersed in the north. A negative correlation between vegetation coverage and density of geological hazards points was discovered, which suggests the regularity of density of geological hazards points descending with the increasing of vegetation coverage: the higher the vegetation,the lower the density of geological hazards points.关键词
植被覆盖度/像元二分法/时空格局/地质灾害/盐池县Key words
vegetation coverage/dimidiate pixel/spatial-temporal pattern/geological hazards/Yanchi County分类
信息技术与安全科学引用本文复制引用
张晓东,刘湘南,赵志鹏,赵银鑫,马玉学,刘海燕..基于像元二分法的盐池县植被覆盖度与地质灾害点时空格局分析[J].国土资源遥感,2018,30(2):195-201,7.基金项目
宁夏回族自治区国土资源厅项目"宁夏盐池县地质灾害详细调查项目"(编号:XC(2012)-05)和水环创新团队后补助资金研究项目(编号:2017-水环团队04)共同资助. （编号:XC(2012）
