基于植被指数的神东矿区植被盖度变化分析

Analysis on the Change of the Vegetation Coverage Degree Based on NDVI in Shendong Coal Mine Areas

随着社会环保意识的逐步增强,近年来矿区开采活动对环境的影响备受关注。为了分析矿区开采活动对环境的影响,文章利用神东矿区不同时相的Landsat遥感影像经过预处理后计算其植被指数,进而计算植被盖度并分析其变化,分析矿区开采活动对绿色植被生长的影响程度。在此基础上以植被指数转化法模型进行了植被盖度的估算。通过对提取出植被信息的分析得出:2002年开采后较1989年开采前植被覆盖情况发生了很大的变化,其中优等与良等覆盖区域增加,中等覆盖区域减少,由于矿区的建设造成非植被覆盖区域的增加。

The influence of mining activities on environment becomes increasingly closed focused with the growing consciousness about the environmental protection.In order to analyze the influence of mining activities on the environment,Landsat remote sensing image of different time phases in Shendong Coal Mine areas were pretreated and its vegetation index was calculated,thereby,vegetation coverage degree and its changes were calculated,moreover,the influence degree of mining activities on the growth of green vegetation were analyzed.Based on this,vegetation coverage estimation was carried out for conversion model of vegetation index.Through analyzing extracted vegetation information,we draw the conclusion that vegetation coverage condition after mining in 2002 changed greatly comparing with that of 1989,hereinto,the great and good vegetation coverage area increased but the general coverage area decreased,meanwhile,the bad area raised because of the development of the coal mining.