基于阈值比值法的森林冰雪冻害遥感评估——以湖南省为例
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王学成, 杨飞, 高星, 张英慧
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Assessment of forest damage due to ice-snow disaster based on the method of threshold ratio:A case study of Hunan Province
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Xuecheng WANG, Fei YANG, Xing GAO, Yinghui ZHANG
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表2 森林雪灾损失评估统计结果
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Tab.2 Statistical results of loss assessment of forest ice-snow disaster
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地点 | 类别 | 图像阈值法 | 阈值比值法 | | | 重度受灾 | 中度受灾 | 轻度受灾 | 重度受灾 | 中度受灾 | 轻度受灾 | 湖南省 | 面积/104hm2 | 219.59 | 108.06 | 88.32 | 223.35 | 114.39 | 78.24 | | 占比/% | 52.79 | 25.98 | 21.23 | 53.69 | 27.50 | 18.81 | 道县 | 面积/104hm2 | 3.85 | 2.21 | 1.10 | 3.85 | 2.19 | 1.12 | | 占比/% | 53.79 | 30.81 | 15.40 | 53.78 | 30.61 | 15.61 | 江永县 | 面积/104hm2 | 3.01 | 1.94 | 1.09 | 3.65 | 1.65 | 0.75 | | 占比/% | 49.80 | 32.18 | 18.02 | 60.38 | 27.23 | 12.40 | 新田县 | 面积/104hm2 | 0.53 | 0.43 | 0.55 | 0.57 | 0.54 | 0.40 | | 占比/% | 34.83 | 28.77 | 36.40 | 38.01 | 35.59 | 26.40 | 浏阳市 | 面积/104hm2 | 2.08 | 3.42 | 4.56 | 3.88 | 3.81 | 2.37 | | 占比/% | 20.68 | 34.00 | 45.33 | 38.56 | 37.85 | 23.59 |
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