摘要
植被覆盖度是刻画地表植被覆盖的一个重要参数,也是指示生态环境变化的重要指标之一.以洱海流域1990年和2006年TM影像为数据源,利用NDVI的像元二分模型法对洱海流域1990年和2006年植被覆盖度进行遥感估算,并进行变化分析.结果显示,近17年来洱海流域植被覆盖度总体上有所提高,无植被覆盖区域面积明显下降,高植被覆盖占全植被覆盖区域面积比大幅提高,二者面积比近50%;在空间分布上,洱海流域上游地区、东部部分地区植被覆盖度相对较低,对地区生态环境稳定构成重大威胁,将是今后洱海流域生态建设和整治的重点区域.
Vegetation coverage is an important parameter of vegetation coverage, also as an ecological indicator for environmental change. Taking 1990 and 2006 TM images data source of Erhai basin, and using NDVI pixel binary model method, remote sensing estimation of vegetation coverage and change analysis have been conducted. The results show that： Nearly 17 years, the vegetation coverage of Erhai basin has increased overall, the change of non-coverage vegetation area is not significant, High vegetation coverage of the total area increasing largely reached nearly 50% , the vegetation coverage of eastern parts and Upstream areas are relatively low on spatial distribution posing a major threat to ecological improvement, We should attach importance to.
出处
《林业调查规划》
2011年第6期10-12,16,共4页
Forest Inventory and Planning
