兰州市削山造地区域生态变化遥感评价方法
高小龙,闫浩文,王桂钢,白建荣

Approach to Remote Sensing Assessment of Ecological Changes of Land Creation in Lanzhou City
Xiaolong Gao,Haowen Yan,Guigang Wang,Jianrong Bai
表3 生态等级面积和比例变化
Table 3 The changes of ecological grade area and proportion
RSEI分级1991年2001年2009年2016年
面积/km2比例/%面积/km2比例/%面积/km2比例/%面积/km2比例/%
差(0—0.2)3 700.6451.763 765.6452.672 934.7341.051 408.3019.70
较差(0.2—0.4)2 284.6231.962 306.4632.262 817.1239.413 175.5644.42
中(0.4—0.6)626.568.76582.548.15873.6412.221 727.4824.16
良(0.6—0.8)302.314.23272.943.82356.264.98584.168.17
优(0.8—1)235.313.29221.853.10167.682.35253.933.55