基于阈值比值法的森林冰雪冻害遥感评估——以湖南省为例

王学成, 杨飞, 高星, 张英慧

Assessment of forest damage due to ice-snow disaster based on the method of threshold ratio:A case study of Hunan Province

Xuecheng WANG, Fei YANG, Xing GAO, Yinghui ZHANG

表1 灾前森林像元NDVI变化率统计结果

Tab.1 Statistical results of forest NDVI change rate before disaster

时段 R<0.3所占比例 R<0.4所占比例 2005049 0.953 1 0.982 9 2006049 0.913 9 0.940 6 2007049 0.566 1 0.627 3 2005065 0.984 7 0.993 1 2006065 0.987 3 0.994 4 2007065 0.990 8 0.997 5