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九寨沟地震次生灾害风险及对自然保护区和自然遗产地的影响
李孝永1,2, 杜国明3, 匡文慧1
1.中国科学院 地理科学与资源研究所, 北京 100101;2.中国科学院大学, 北京 100049;3.东北农业大学 资源与环境学院, 黑龙江 哈尔滨 150030
摘要:
[目的]对四川省九寨沟地震次生灾害及其对自然保护区和自然遗产地的影响进行评估,为灾区生态环境恢复重建规划的制定提供科学参考。[方法]基于土地利用、地形、植被覆盖、自然保护区和自然遗产地分布等数据,分析九寨沟地震区域的自然生态环境状况,评估震区的次生灾害风险等级,重点分析自然保护区与遗产地内的次生灾害风险状况。[结果]灾区地震烈度较高的地区主要位于海拔3 000 m以上的区域,土地利用类型以林地和草地为主,平均植被覆盖度达到58%;次生灾害高风险区面积占30%左右,主要分布在距断裂带较近和坡度较陡的区域;中部和南部的自然保护区处于次生灾害高风险区,西部及北部则处于低风险区;自然遗产地主要分布在极高风险区,增加了景区和自然遗产地的生态风险。[结论]地震使九寨沟自然遗产地、林草植被和动物栖息地遭受不同程度破坏,对九寨沟景区旅游业造成严重影响。建议对九寨沟旅游景区和世界自然遗产地实施优先恢复重建,并加强生态保护和风险防范力度。
关键词:  九寨沟地震  次生灾害  自然保护区  风险评估  自然遗产地  旅游业
DOI:10.13961/j.cnki.stbctb.2019.02.047
分类号:X43
基金项目:国家重点研发计划项目“遗产地监测保护与管理信息平台构建”(2016YFC0503309)
Risks of Secondary Disasters and Its Impact on Nature Reserves and Natural Heritages in Jiuzhaigou Earthquake Area
Li Xiaoyong1,2, Du Guoming3, Kuang Wenhui1
1.Institute of Geographic Sciences and Natural Resources Research, Chinese Academy of Sciences, Beijing 100101, China;2.University of Chinese Academy of Sciences, Beijing 100049, China;3.College of Resources and Environment, Northeast Agricultural University, Harbin, Heilongjiang 150030, China
Abstract:
[Obejective] The risks of secondary disasters and its impact on nature reserves and natural heritages in Jiuzhaigou earthquake area were studied in order to provide references for post-disaster recovery and reconstruction planning, as well as for nature reserves and natural heritages protection.[Methods] Based on land use data, DEM data, vegetation cover and natural protected area and heritage data, the spatial characteristics of ecological environment in Jiuzhaigou earthquake area were analyzed and the risk level of secondary disasters was assessed. Then, the risks of secondary disasters in nature reserves and natural heritage in earthquake area was assessed.[Results] The high earthquake intensity area was mainly located in the areas over 3 000 m altitude, where the land use was dominated by forest and grassland, and the mean vegetation coverage was up to 58%. The total area of high-risk zone accounted for about 30% of the study area, which mainly near to the fault zone and steeper slope zone. Nature reserves located in the central and south of the area, and most natural heritages located in high-risk zone, while the west and north regions were low-risk zone. To some extent, the secondary disasters aggravated the ecological risk of Jiuzhaigou scenic area and natural heritage.[Conclusion] The natural heritage areas, forest and grass and animal habitats were damaged by the earthquake with varying degrees, which had a serious impact on tourism in Jiuzhaigou scenic area. Therefore, Jiuzhaigou scenic area and Jiuzhaigou natural heritage should be the priority areas of restoration and reconstruction, and strengthen ecological protection and risk prevention.
Key words:  Jiuzhaigou earthquake  secondary disaster  nature reserves  risk assessment  natural heritage  tourism industry