摘要
以1979年和2005年的Landsat TM影像为数据源,在对其进行几何订正、大气和地形辐射校正的基础上,采用归一化植被指数和改进的像元二分模型,对北京市门头沟区的植被覆盖进行了动态遥感监测,结果表明该区植被覆盖总体上呈下降趋势。在此基础上结合研究区边界矢量文件和DEM数据,利用GIS技术和生态景观指标分析方法,定量分析了该区景观面积变化、景观边缘特征和形状特征,对其植被变化进行了景观生态学评价。针对该区植被覆盖变化的时空特点,进行了生态修复区划研究,将全区划分为生态脆弱区、生态控制区、生态协调区、生态稳定区。针对各区划的特点,分别提出了生态修复合理化建议。
In this paper, we chose two TM images of 1979 and 2005 as data source, based on normalized difference vegetation index and improved pixel binary model. After geome try revision, atmospheric correction and terrain revision with the aid of remote sensing technology, we calculated the vegetation coverage of Mentougou District, and dynamically monitored the vegetation cover changes of this district. The result shows that the vegeta tion coverage has a downward trend. Then we analyzed the temporal and spatial changes of the vegetation coverage based on the basic geographic information data and DEM data of this district, and studied the landscape ecology characteristics of the changes using （}IS technology and ecological landscape indicators by dividing the area into four parts as eco logical fragile areas, ecological control area, ecological coordination area and ecological stability area, and based on the characteristics for each division we proposed some sugges- tions for the ecological restoration, which can provide decision support for the local gov ernment to carry out some ecological restoration Projects.
出处
《地理研究》
CSCD
北大核心
2011年第7期1227-1236,共10页
Geographical Research
基金
北京市自然科学基金资助项目(4071002)
河南省科技厅科技攻关项目(112102310537)
许昌学院科研基金项目(2011B040)
关键词
遥感
植被覆盖
生态修复
景观特征
remote sensing
vegetation coverage
ecological restoration
landscape charac teristics
