| 汶川地震前后茂县植被覆盖度变化研究 |
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| 引用本文： | 罗慧芬,苗放,叶成名,赵国祥. 汶川地震前后茂县植被覆盖度变化研究[J]. 水土保持通报, 2013, 33(3): 202-205 |
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| 作者姓名： | 罗慧芬 苗放 叶成名 赵国祥 |
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| 作者单位： | 成都理工大学地球物理学院,四川成都610059;成都理工大学地球探测与信息技术教育部重点实验室,四川成都610059 |
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| 基金项目： | 四川省科技厅支撑计划项目"基于RS和GIS的地震灾区生态环境监测技术与应用研究"，国家自然科学基金项目"综合多特征的建筑物震害SAR图像定量化检测研究" |
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| 摘 要： | “5· 12”汶川地震引起的滑坡、泥石流、崩塌等次生地质灾害对灾区的植被覆盖造成严重的破坏.茂县地处于地震重灾区,查清地震对茂县植被覆盖的破坏程度可为植被修复提供参考依据,便于防控水土流失和地质灾害隐患.选取茂县地震前后Landsat 5 TM的遥感影像作为数据源,采用归一化植被指数和像元二分法为估算模型,提取地震前后茂县植被覆盖度数值.通过对数据的研究将该区植被覆盖度划分为4级:高植被覆盖区、中植被覆盖区、低植被覆盖区和无植被覆盖区,并对每种覆盖类型的变化进行统计分析.结果表明,地震对高植被覆盖区的影响最严重,中植被覆盖区的影响次之,低植被覆盖区的影响最小；植被覆盖度破坏较严重的区域主要分布在坡度大于40°的地区.
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| 关 键 词： | 汶川地震 辐射定标 归一化植被指数 像元二分法 植被覆盖度 |
| 收稿时间： | 2012-11-08 |
| 修稿时间： | 2012-11-15 |
Vegetation Coverage Change of Maoxian County Before and After Wenchuan Earthquake |
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| LUO Hui-fen,MIAO Fang,YE Cheng-ming and ZHAO Guo-xiang. Vegetation Coverage Change of Maoxian County Before and After Wenchuan Earthquake[J]. Bulletin of Soil and Water Conservation, 2013, 33(3): 202-205 |
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| Authors: | LUO Hui-fen MIAO Fang YE Cheng-ming ZHAO Guo-xiang |
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| Affiliation: | College of Geophysics, Chengdu University of Technology, Chengdu, Sichuan 610059, China;Key Laboratory of Earth Exploration &Information Techniques of Ministry of Education, Chengdu University of Technology, Chengdu, Sichuan 610059, China;College of Geophysics, Chengdu University of Technology, Chengdu, Sichuan 610059, China;Key Laboratory of Earth Exploration &Information Techniques of Ministry of Education, Chengdu University of Technology, Chengdu, Sichuan 610059, China;College of Geophysics, Chengdu University of Technology, Chengdu, Sichuan 610059, China;Key Laboratory of Earth Exploration &Information Techniques of Ministry of Education, Chengdu University of Technology, Chengdu, Sichuan 610059, China;College of Geophysics, Chengdu University of Technology, Chengdu, Sichuan 610059, China;Key Laboratory of Earth Exploration &Information Techniques of Ministry of Education, Chengdu University of Technology, Chengdu, Sichuan 610059, China |
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| Abstract: | |
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| Keywords: | Wenchuan earthquake radiometric calibration normalized difference vegetation index dimidiate pixel model vegetation coverage |
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