近10年甘肃玛曲县主要生态环境退化的遥感监测

以2000、2005和2010年的Landsat系列卫星数据为主要数据源,利用遥感和GIS技术,对甘肃省玛曲县近10年主要生态环境退化进行了监测。研究结果表明,2000～2010年间,该区主要生态环境退化趋势得到了初步遏制,土地退化程度有所减轻;植被覆盖以轻度恢复为主,占总面积的45%以上;沼泽湿地的面积呈减少的趋势,减少的面积主要转变为草地;沙漠化面积减少、程度减轻。然而,玛曲县生态环境退化的潜在因素仍然存在,其中过度放牧和人口增加是导致该地区生态环境恶化的主要因素。

Remote Sensing Monitoring on Major Eco-Environmental Degradation of Maqu County, Gansu Province in Recent 10a

Based on RS and GIS technique,Landsat images in 2000,2005 and 2010 were used to monitor the status of ecological environment of Maqu County in Gansu Province.The results showed that the ecologic environment has been deteriorated,but the degree has been reduced.The area of the vegetation coverage of mild recovery is accounted for more than 45% of the total area.Desertification area reduced,and the degree of it decreased.The area of marsh wetland has been reduced,which has been mainly into the grassland.The eco-environment deterioration was mainly caused by both over grazing and population increasing.