Change detection of ground-surface environment in rare earth mining area based on multi-temporal remote sensing:a case in Lingbei rare earth mining area
Change detection of ground-surface environment in rare earth mining area based on multi-temporal remote sensing:a case in Lingbei rare earth mining area
复制标题
DOI：
--
复制
发表时间：
2014
期刊：
影响因子：
--
通讯作者：
Li Heng-ka
中科院分区：
文献类型：
--
作者：
Li Heng-ka
离子型稀土矿开采带来了一系列生态环境问题，不断引起人们的关注。利用20年TM遥感数据，对定南县灵北稀土矿区地表环境的长期变化进行了分析。为了增强监测分析的可靠性，采用分形纹理辅助分类方法对分类后比对方法进行了改进。构建了可分离指数和J-M距离两种波段选择和分形窗口模型，并比较了其适应性。为分形纹理的定量选择提供了一种辅助分类的方法。结果表明，随着矿山开采规模的不断扩大，矿区沙漠化日益严重，并有合并的趋势，使治理难度加大。通过推广地浸采矿技术和矿区复垦，部分减缓了沙漠化的增长趋势。稀土矿周边植被已经退化，稀土开采对水体和土壤的污染应引起重视，并可能对植被生长产生影响。
Ionic rare earth ore mining has brought a series of ecological and environmental problems,and aroused people's concern continuously.The paper analyzed the long-term changes in the surface environment of Lingbei rare earth mining area in Dingnan County by using 20 years long TM remote sensing data.In order to strengthen the reliability of monitoring and analysis,the method of post-classification comparison was improved by using the fractal texture auxiliary classification.The two kinds of model of the band selection and the fractal window named the separable index and the J-M distances were constructed,as well as compared its adaptability.All of these provided a quantitative method for selecting fractal texture to assist classification.The results showed that the mining area desertification has become more serious with the continuous expansion of mining,and a merging tendency made it hard for governing.By promo-ting the in-situ leaching mining technology and mining reclamation,it partly slows down the growth tendency of desertification.The vegetation around rare earth mines has degraded,the water and soil pollution of rare earth extraction should be noticed,and it may have impact on vegetation growth.