| 汶川“5?12”地震前后十年生态环境变化分析 |
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| 引用本文： | 刘浩,陈建平.汶川“5?12”地震前后十年生态环境变化分析[J].地质学刊,2020,44(4):422-428. |
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| 作者姓名： | 刘浩 陈建平 |
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| 作者单位： | 中国地质大学(北京)地球科学与资源学院 |
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| 基金项目： | 科技部深地资源勘查开采专项“深部成矿地质异常定量预测方法与模型”（2017YFC0601502）资助 |
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| 摘 要： | “5?12”汶川大地震使震中汶川的生态环境发生了巨大变化，基于地震前后多年的遥感影像数据和气象站点数据，将生态环境影响因子分为地形因素（高程、坡度、坡向）、自然因素（植被覆盖度、土壤湿度指数）和气象因素（年降水量、年平均气温）3大类。采用综合评价指数法，即加权综合评分法中的层次分析法（AHP）计算出评价因子的影响权重。利用评价因子分级和权重计算生态环境综合指数，对生态环境综合指数进行分级，综合比较研究区生态环境变化，总结汶川地震前后10年的生态环境变化情况。结果表明，研究区的生态环境受地震影响，经历了破坏、修复和超过震前水平的过程，人类活动对生态环境变化有着重要影响
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| 关 键 词： | 地震 生态环境 评价 层次分析法 四川汶川 |
Analysis of ecological environment changes of Wenchuan (2007-2017) owing to Great Wenchuan Earthquake of 2008 |
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| Liu Hao,Chen Jianping.Analysis of ecological environment changes of Wenchuan (2007-2017) owing to Great Wenchuan Earthquake of 2008[J].Jiangsu Geology,2020,44(4):422-428. |
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| Authors: | Liu Hao Chen Jianping |
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| Abstract: | The Great Wenchuan Earthquake caused great changes in the ecological environment of Wenchuan County, the epicenter of the earthquake. Based on the remote sensing image data and meteorological station data in years before and after the earthquake, the ecological environment influencing factors were divided into 3 major categories: terrain factors (elevation, slope, and aspect), natural factors (vegetation coverage and soil moisture index), and meteorological factors (annual precipitation and annual average temperature). The comprehensive evaluation index method, namely, the Analytic Hierarchy Process (AHP) in the weighted comprehensive scoring method, was used to calculate the influence weight of the evaluation factor. The paper calculated the comprehensive ecological environment index using the evaluation factor grading and weight, classified the comprehensive ecological environment index, comprehensively compared the changes in the ecological environment rating of the study area, and obtained the ecological environment changes in Wenchuan County in 2007-2017. The results show that the ecological environment of Wenchuan County has been affected by the earthquake, and undergone the process of destruction, restoration and status quo exceeding the pre-earthquake level. Human activities have a huge impact on the ecological environment change. |
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| Keywords: | earthquake ecological environment evaluation Analytic Hierarchy Process Wenchuan Sichuan |
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