康保县1987~2016年植被覆盖度动态变化分析

Dynamic Change Analysis of Vegetation Coverage in Kangbao County from 1987 to 2016

以康保县1987~2016年间7个时相的Landsat数据为数据源,利用像元二分法模型得到各时相的植被覆盖度并进行分级,分析了康保县30 a间植被覆盖的时空变化特征。结果表明:①康保县中部和南部植被覆盖情况较好;②1987~2016年,康保县的平均植被覆盖度从53.9%降到45.1%,下降8.8%;③1987~2003年中高植被覆盖度面积下降,2003~2016年面积上升。

Based on the Landsat data of seven phases from 1987 to 2016, we used the pixel dichotomy model to obtain the vegetation coverage of each phase, and analyzed the spatio-temporal change features of vegetation coverage in Kangbao County during 30 years. The results show that(1) the vegetation coverage in the central and southern parts of Kangbao County are better.(2) From 1987 to 2016, the average vegetation coverage of Kangbao County decreased from 53.9 % to 45.1 %, down 8.8 %. From 1987 to 2003, the area of vegetation coverage decreased, and the area increased from 2003 to 2016.