甘肃文县地震引发的生态环境响应定量化分析  

Quantitative analysis of ecological environment response to earthquake in Wenxian County, Gansu Province, China

作　　者：李璇琼[1] 何政伟[2] 梁延龙 LI Xuanqiong;HE Zhengwei;LIANG Yanlong(Department of Geomatics Engineering,Sichuan College of Architectural Technology,Deyang 618000,China;College of Earth Sciences,Chengdu University of Technology,Chengdu 610059,China)

机构地区：[1]四川建筑职业技术学院测绘工程系,四川德阳618000 [2]成都理工大学地球科学学院,成都610059

出　　处：《成都理工大学学报（自然科学版）》2022年第5期623-632,共10页Journal of Chengdu University of Technology: Science & Technology Edition

基　　金：四川省教育厅自然科学创新团队项目(16TD0040);德阳市科技计划重点研发项目(2020SZZ051)。

摘　　要：以甘肃省文县为例,通过遥感、地理信息系统和地理统计分析,为地震诱发的生态环境响应提供定量评价方法。研究表明:随着地震烈度的提高,土地损毁比例升高,植被破坏严重,水土流失效应越明显;震后碧口镇、中庙镇、范坝镇、玉垒乡等地震烈度较高等级的乡镇景观破碎度大幅度提高,生态系统服务价值显著减弱。可采用适度退耕还林、坡地改梯田、修建截流沟、修筑拦水坝、修建湿地公园、绿道等方法进行震后生态环境的恢复治理。Wenxian County in Gansu Province is located in the Longmenshan fault belt. Frequent earthquakes have caused serious damage to the ecological environment in this area. In this paper, RS, GIS, genetic neural network and other methods are used to extract ecological factors such as land use, vegetation coverage, soil and water loss, landscape fragmentation, and ecosystem service value before and after the earthquake. Spatial analysis, geostatistics and other tools are used to quantitatively analyze the spatio-temporal evolution of the earthquake-induced ecological environment. The results show that with the increase of earthquake intensity, the proportion of land damage increases, with serious vegetation damage and with obvious soil erosion effect. After the earthquake, the landscape fragmentation degree of towns with higher earthquake intensity(such as Bikou Town, Zhongmiao Town, Fanba Town and Yulei Town), was obviously increased, and the ecosystem service value was significantly weakened. It is proposed that the restoration and management of ecological environment after earthquake can be carried out by moderately returning farmland to forest, changing sloping land to terraced fields, building intercepting ditch, erecting dam, constructing wetland park and greenway.

关 键 词：地震 生态环境响应 定量分析 RS GIS 

分 类 号：P694[天文地球—地质学]