基于遥感的东营市植被覆盖动态变化研究

以东营地区1995年和2010年两期TM影像为数据源，通过计算归一化植被指数，并利用混合像元二分模型计算植被覆盖度，其植被覆盖变化从低到高分为5个等级．植被覆盖度变化结果如下：从1995年一2010年东营地区植被中高和高覆盖度类型面积增加，其面积变化率分别为483．2％和168．35％，极低和低植被覆盖度类型面积减少，其面积变化率分别为61．01％和51．11％．从空间上看，东营地区整体植被覆盖度都有所增加，而北部沿海、中部城区的植被覆盖度有所下降，这与东营市近年来重视植被保护和城市化加速有密切的关系．

Study on Dynamic Change of Vegetation Coverage in Dongying City Based on RS

The NDVI （normalized difference vegetation of index） was calculated based on the Dongying City data of TM images in 1995 and 2010, and the vegetation coverage was analyzed also by using the model of dimidiate pixel level. The vegetation coverage can be grouped into five classification ranging from extremely low to high. The results of vegetation coverage in Dongying City show that the middle-high and high coverage areas have increasead significantly during the period from 1995 to 2010. Their variation rates are 483.2% and 168.35%. The extremely low and low vegetation coverage areas have decreased. Their variation rates are 61. 01% and 51.11%. The vegetation coverage increased in the whole Dongying City,but decreased in the north coast and the middle urban part aeras, which is closely related with the government＇s environment protecting policies and the City＇s rapidly developing.