青海大场金矿矿集区1988-2016年多时相植被覆盖率估算及变化检测研究  

Estimation and change detection of vegetation coverage for 1988-2016 years in Dachang gold mine area, Qinghai

作　　者：张肃[1] ZHANG Su(Sichuan Institute of geological survey,Chengdu 610081,China)

机构地区：[1]四川省地质调查院,四川成都610081

出　　处：《世界有色金属》2018年第18期183-187,189,共6页World Nonferrous Metals

摘　　要：土地及植被覆盖是全球环境变化研究的关键内容,对研究人类活动与自然环境的相互作用具有重要意义,尤其是多时相的土地植被覆盖的对比研究,可以得出区域土地植被变化趋势。青海玉树大场金矿是亚洲最大的金矿之一,矿区的植被土地覆盖变化对于矿区生态环境研究具有重要意义。本文对利用4期Landsat系列卫星影像,使用植被指数转换算法,对青海大场金矿矿集区1988-2016近30年来的植被覆盖率进行了计算,得出了土地植被的覆盖率统计结果。研究结果显示,并且通过变化检测分析,从1988年开始,植被覆盖率初期呈现减小趋势,而到了2016年,又呈现出增加趋势。结果说明了该研究区域的植被显示出"减少-增加"的反转趋势,这与30年来的气候变化和人类活动,环境治理等多方面因素有关。将研究结果和近30年的卫星影像变化参照对比,发现变化检测结果与卫星影像的变化趋势吻合,说明了植被覆盖率变化检测结果的可靠性。Land use and vegetation coverage are the key components of global environmental change research.It is of great significance to study the interaction between human activities and natural environment.Especially the comparative study of multi-temporal land and vegetation coverage,we can get the trend of regional land and vegetation change.The Yushu Dachang Gold Mine in Qinghai is one of the largest gold mines in Asia.The change of vegetation land coverage in the mining area is of great significance for the study of the ecological environment of the mining area.In this paper,we use four Landsat series satellite images,and the vegetation index transformation algorithm,the vegetation coverage rate of Qinghai Dachang gold ore concentration area from 1988 to 2016 in the past 30 years was calculated,and the statistical results of vegetation coverage were obtained.The results of the study show that,through change detection and analysis,since 1988,the vegetation coverage rate has shown a decreasing trend at the beginning,and by 2016,it has shown an increasing trend.Thus the results show that the vegetation in the study area has a“reduction-increasing”reversal trend,which is related to climate change and human activities,environmental governance and other factors in the past 30 years.Comparing the research results with the changes of satellite imagery in the past 30 years,it is found that the change detection results are consistent with the trend of satellite imagery,indicating the reliability of the detection results of vegetation coverage change detection.

关 键 词：大场金矿 植被覆盖率 landsat卫星 变化检测 

分 类 号：F272[经济管理—企业管理]