安庆市2007—2016年植被覆盖度时空动态分析研究

Analysis of Spatial and Temporal Dynamics of Vegetation Coverage in Anqing City in 2007/2016

植被覆盖度常作为检测植被状况的重要指标,因此可以通过估算植被覆盖度来对某区域的植被时空动态变化进行研究。本文对2007年和2016年两个时相的TM遥感影像进行遥感影像预处理操作,得到安庆市不同时相的植被覆盖图。利用植被指数法对安庆市2007年、2016年两个不同时相的植被覆盖度进行计算得到植被覆盖度数值,结合国家规定的植被覆盖度的划分标准对安庆市2个时相的植被覆盖度进行等级划分。最终结果显示,安庆市2007—2016年10年间的植被覆盖度变化较大,极低与低植被覆盖度等级的面积呈减少趋势,中、中高和高等级的植被覆盖度的面积明显增多,这说明10年间安庆市的植被生物量明显增多,生态环境得到改善。

Vegetation coverage is often used as an important indicator to detect vegetation status. Therefore, the spatial and temporal dynamic changes of vegetation in a region can be studied by estimating vegetation coverage. In this paper, remote sensing image preprocessing operations are performed on the two phases of TM remote sensing images in 2007 and2016, and vegetation coverage maps of different phases in Anqing City are obtained. Using the vegetation index method to calculate the vegetation coverage of vegetation coverage at two different phases of 2007 and 2016 in Anqing City, the vegetation coverage of two phases in Anqing City is graded according to the national standard for the coverage of vegetation coverage. The final result shows that the vegetation coverage in Anqing City during ten years from 2007 to 2016 changed greatly,and the area of extremely low and low vegetation coverage grades show a decreasing trend, and the areas of medium, high and high grade vegetation coverage increase significantly. It shows that in the 10 years, the vegetation and biomass of Anqing City have been increased obviously and the ecological environment has been improved.