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。
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.
作者
刘浩
陈建平
Liu Hao;Chen Jianping(School of Earth Sciences and Resources,China University of Geosciences(Beijing),Beijing 100083,China;Beijing Key Laboratory of Development and Research for Land Resources Information,Beijing 100083,China)
出处
《地质学刊》
CAS
2020年第4期422-428,共7页
Journal of Geology
基金
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。
关键词
地震
生态环境
评价
层次分析法
四川汶川
earthquake
ecological environment
evaluation
Analytic Hierarchy Process
Wenchuan
Sichuan
作者简介
刘浩(1996—),男,硕士研究生,地质工程专业,研究方向为国土资源调查与管理,E⁃mail:hliu9695@163.com;通信作者:陈建平(1959—),男,教授,博士,博士生导师,地球探测与信息技术专业,主要从事矿产资源定量预测与评价研究工作,E⁃mail:3s@cugb.edu.cn.
