摘要
研究岩溶峡谷NDVI变化,可为退耕还林、石漠化治理、峡谷生态保护提供科学参考。以贵州境内岩溶峡谷为研究区,选取2000—2018年NDVI数据和2010年人口数据,探究了其NDVI时空演变规律及与人口的关系。结果表明:(1)2000—2018年NDVI由0.659增长至0.807,增长0.148,表明植被处于恢复趋势;(2)2000—2018年城市及其附近NDVI较低;期间NDVI上升地区面积超过97%,下降地区不足3%;(3)将2000—2018年NDVI分为6等级,小于0.4、0.7—0.8、大于0.8的区域NDVI占比呈现上升趋势,0.4—0.5、0.5—0.6、0.6—0.7的区域NDVI占比处于下降趋势;(4)2000—2018年随人口密度增加NDVI总体处于下降趋势,期间NDVI增量随人口密度增加呈减少趋势。贵州岩溶峡谷NDVI总体保持上升,人口密度与NDVI变化关系密切。
Studying NDVI changes in karst canyon can provide scientific references for returning farmland to forests,stony desertification management,and canyon ecological protection.Taking karst canyon in Guizhou as the research area,NDVI data from 2000 to 2018 and population data from 2010 were selected to explore the temporal and spatial evolution rule of NDVI and the relationship of population.The results show that:(1)From 2000 to 2018,NDVI increased from 0.659 to 0.807,indicating that vegetation in karst canyon was in a trend of restoration.(2)The NDVI of the city and its vicinity was low during 2000-2018.During the period,the area of NDVI increased by over 97%and the area of NDVI decreased by less than 3%.(3)From 2000 to 2018,NDVI was divided into 6 grades.The proportion of NDVI in regions less than 0.4,0.7-0.8 and greater than 0.8 was on the rise,while the proportion of NDVI in regions 0.4-0.5,0.5-0.6 and 0.6-0.7 was on the decline.(4)From 2000 to 2018,NDVI generally declined with the increase of population density,during which the NDVI increment decreased with the increase of population density.NDVI in karst canyon in Guizhou keeps rising on the whole,and the population density was closely related to the change of NDVI.
作者
龙映豪
李旭东
程东亚
LONG Yinghao;LI Xudong;CHENG Dongya(School of Geography and Environmental Sciences,Guizhou Normal University,Guiyang,Guizhou 550025,China)
出处
《生态科学》
CSCD
2022年第5期134-143,共10页
Ecological Science
基金
国家自然科学基金项目(41261039)
贵州省科技厅项目【黔科合J字[2009]2253】。
