豫南丘陵山区土地利用变化及其生态安全评估研究

The Land Use Change and Land Ecological Security Assessment of Hilly Area in Southern Henan

基于2004年、2008年和2015年3个时期的Landsat遥感影像,对豫南丘陵山区的土地利/土地覆盖变化信息进行提取,并分析其土地利用动态变化规律;在此基础上,利用多源数据构建了"隐患―状态―免疫"区域土地生态安全评价指标体系,应用综合指数法对研究区的土地生态安全进行评价.研究结果表明:1由于社会经济的快速发展和人类活动影响的加剧,研究区土地利用变化剧烈,未利用地、水域面积明显减少,建设用地、耕地面积持续增加;2研究区内各个区、县的土地生态安全存在明显的时空差异,呈现出总体好转和局部恶化的不平衡趋势.

The LUCC(Land-Use and Land-Cover Change)is extracted and analyzed based on the interpretationof remote sensing image in the year of2004,2008and2015,then an evaluation index system is established on thebasis of the Hazard-State-Immune model in Hilly Area of Southern Henan,China(Chinese north-south transitionzone).The comprehensive index is used to evaluate the land ecological security in the study area.The results showthat firstly,the rapid development of social economy and the intensification of human activities leads to rapidchanges on land use,unused land and water area decreasing,and the area of construction land and farmlandincreaseing continuously.Secondly,there is an overall rising trend of regional land ecological security,but the landecological security of each district/county are obviouslg different from time to space.