基于神东中心区植被覆盖变化的多时相遥感监测

Monitoring of Vegetation Coverage Variation Based on Multi-Temporal Remote Sensing Data in Shendong Centre

准确、快速地获取植被覆盖信息是矿区生态恢复和建设的关键与重点。以神东中心区为研究对象,利用2002、2005、2007、2010、2012年Landsat TM/ETM+和HJ1A-CCD1五景同期遥感数据,采用像元二分模型法,归一化植被指数(NDVI)值反演植被覆盖度,对研究区生态环境变化规律进行分析。结果表明,神东中心区平均植被覆盖度整体呈上升趋势,区内绝大部分地表覆盖程度得到改善,改善区面积达64.01%,退化区面积只有15.34%。该方法快速、定量地反映矿区植被覆盖及变化情况,为矿区生态环境动态监测和治理提供技术支持。

It is very important to obtain vegetation fraction information for ecology recovery and construction in coahnine area. Taking Shendong centre as a case,the variation rule of ecological environment in is analyzed according to Landsat TM/ETM ＋ and HJ1A-CCD1 remote sensing data from the years 2002,2005,2007,2010 and 2012, extracting the NDVI data and inversing the vegetation coverage by using dimidiate pixel model. The results indicate that average value of the vegetation coverage in Shendong centre increases integrally, and the land coverage in most of the area is improved, the ratio of improved area reaches to 64.01% , while the ratio of degraded area is only 15.34%. This method can be used for ecological environment dynamic monitoring and management in lager areas because it can analyze on vegetation coverage and its changes rapidly and quantitativelv.