摘要
植被作为生态系统的重要组成部分,是生态系统存在的基础,也是连接土壤、大气和水分的自然"纽带",植被覆盖及其变化是区域生态环境变化的重要指标,对水土保持、气候变化等都具有重要的意义。以大庆市为研究区域,运用归一化植被指数(NDVI)方法估算植被覆盖度,在RS和GIS技术支持下,利用1990、2001和2007年三期的TM遥感数据,对植被覆盖变化进行分析。结果表明:大庆市NDVI平均值在1990-2001年间下降,2001-2007年为上升的趋势。17年间各行政区的NDVI平均值及植被覆盖面积也有不同程度的变化。由此可见,大庆市在生态破坏后开始注重环境的重要性,采取了措施进行生态治理,取得了显著的成果,也说明人类活动是城市植被覆盖变化的重要原因。
Vegetation, as an important component of ecosystem, is the basis of ecosystem and is also the natural ＂tie＂ which connects soil, atmosphere and moisture content. The change of vegetation coverage is an important target of regional eco-environmental change. Taking Daqing City as an example and using NDVI （Normalized Difference Vegetation Index） method to estimate the degree of vegetation coverage, this paper analyzes the change of vegetation coverage, based on RS and GIS techniques and remote sensing data of TM respectively in 1990, 2001 and 2007. The result shows that mean value of NDVI in the city dropped from 1990 to 2001 and rose from 2001 to 2007 and the mean value of NDVI and vegetation coverage area in the past 17 years had experienced changes of different degrees in each administrative area, indicating that the city started to attach great importance to environment after the ecological destruction and took various measures to govern the ecology, achieving remarkable progress, which proves that human activities are responsible for the change of urban vegetation coverage.
出处
《国土资源科技管理》
2010年第2期109-113,共5页
Scientific and Technological Management of Land and Resources
基金
东北农业大学创新团队基金--黑土区保护与可持续利用CXT003-4-2
关键词
植被覆盖
归一化植被指数
大庆市
vegetation cover
normalized difference vegetation index （NDVI）
Daqing City
