近20多年来赣州地区稀土矿区遥感动态监测

稀土资源是现代科技所需的重要资源,由于其有很高的经济价值,稀土资源的开采活动越来越频繁,过度开采现象严重,对稀土矿区的实时监控成为保护环境资源的重要环节。遥感技术在监测土地利用变化方面已经有了完善的技术方法。相较于普遍使用的Landsat-TM/ETM+数据,我国研发的HJ卫星(中国环境与灾害监测预报小卫星)数据具有更短的重访周期,能够对稀土矿的开采进行更加有效的检测。通过结合Landsat-TM/ETM+与HJ-1/CCD数据,根据矿区植被覆盖度的变化及时监测稀土矿区活动情况,对江西定南地区20a来稀土矿区开采变化情况进行监测,并提出保护建议,为实现矿产资源的可持续发展提供理论依据。

Dynamic Monitoring of Rare Earths Mining Area in Ganzhou during Recent 20 Years based on Remote Sensing

Rare earths are important resources which are required by modern technology.The high economic benefits from rare earths mining that lead to seriously over exploitation,which causes the serious environmental problems and needs to be monitored for the purpose of protecting environment.Remote sensing as a macro observing method is good at land cover change detection.There are many different kinds of remote sensing data,has become a important change monitoring data base.In this study,spectral information is used to calculate the normalized difference vegetation index (NDVI),and the NDVI of estimation of vegetation coverage.the Landsat\|TM/ETM+ and HJ\|1/CCD data are used together to monitor the rare earths mining circumstances,including mining numbers,mining starting date,mining close date,mining type,mining areas,and the change of vegetation cover from 1988~2012 at Dingnan,Jiangxi province.Through the use of HJ\|1/CCD satellite data,shortening the period of field monitoring,reduce costs,and vegetation coverage index can direct response,mining area of variations provides the reference for the protection work of the study area.