基于Landsat卫星影像的楚雄州林地、灌草地动态变化研究

Research in Dynamic Changes of Forest and Shrub-Grass Land in Chuxiong Prefecture Based on the Landsat Satellite Images

摘要: 本文基于Landsat TM/ETM+影像提取了1990~2010这20年间楚雄州林地、灌草地面积的变化，结果表明，楚雄州在1990~2010年这20年，林地、灌草地面积变化明显，整个地区的林地面积从59.56%下降到34.11%，下降值为25.45%，林地面积下降最快时间段是1990~2000年，总体呈下降趋势；灌草地面积从32.63%上升到60.37%，上升值为27.74%，总体呈增长趋势。

Abstract: This paper extracted forest and shrub-grass land area from 1990 to 2010 in Chuxiong prefecture based on the Landsat TM/ETM + images. The results showed that the forest and shrub-grass land area changed significantly. The forest area decreased from 59.56% to 34.11%, the change range was 25.45%, and the fastest falling time period was from 1990 to 2000, and it presented a downward trend generally. The shrub-grass land area increased from 32.63% to 60.37%, the change range was 27.74%, and it presented a rising trend generally.