陈润^1,,
郭忻怡^2,3,
杜杰⁴,
胡晓^1,,
1. 西南林业大学, 云南 昆明 650224
2. 中国科学院空天信息创新研究院, 北京 100094
3. 中国科学院大学, 北京 100049
4. 九寨沟管理局, 四川 阿坝 623402

基金项目: 四川省科技计划项目"九寨沟近现代环境历史重建与旅游可持续发展系统构建"(批准号:2016HH0080)资助


详细信息

作者简介: 陈润, 女, 34岁, 硕士研究生, 生态旅游发展研究, E-mail:chenrun.cr@foxmail.com

通讯作者: 胡晓, E-mail:295341093@qq.com

中图分类号: F694

收稿日期:2020-03-27
修回日期:2020-07-10
刊出日期:2020-09-30

Monitoring of disturbance on ecological environment caused by earthquake and post-disaster reconstruction at Heye Village area of Jiuzhaigou using the high-resolution remote sensing imageries

Chen Run^1,,
Guo Xinyi^2,3,
Du Jie⁴,
Hu Xiao^1,,
1. Southwest Forestry University, Kunming 620224, Yunnan
2. Aerospace Information Research Institute, Chinese Academy of Sciences, Beijing 100094
3. University of the Chinese Academy of Sciences, Beijing 100049
4. Jiuzhaigou Administration Bureau, Aba 623402, Sichuan


More Information

Corresponding author: Hu Xiao,E-mail:295341093@qq.com

MSC: F694

--> Received Date: 27 March 2020
Revised Date: 10 July 2020
Publish Date: 30 September 2020


摘要
摘要:2017年九寨沟M_S7.0级地震及次生滑坡、崩塌等地质灾害对九寨沟世界自然遗产地的生态环境和村寨造成了破坏和扰动。文章利用高精度遥感监测技术对地震前后荷叶寨及其周边的地质灾害和植被覆盖度变化进行了监测。研究表明，震后该区域原有不稳定区域发生了更大范围和规模的崩塌和滑坡，但是由于村寨选址较好地避开了这些区域，因此并未遭受毁灭性破坏，避免了灾后搬迁。震后该区域的两处滑坡都进行了治理，治理面积约1.5 hm²，村寨交通条件得到进一步改善。灾后重建以来，村寨的范围并没有扩大，地震毁坏的建筑物仅在原地重建。研究区域的土地利用方式未发生明显改变，只有面积约为1 hm²的开阔草地转换为临时建设工地。高植被覆盖度区占比由震前的91.98%下降至91.09%，而裸地-中低植被覆盖度区占比由震前的4.78%上升至6.53%。因此，地震及次生地质灾害对该区域造成了一定的扰动，但经过灾后两年多的重建和生态恢复工作，其生态环境总体上处于良好恢复状态。为了保障灾后重建规划执行、保护世界遗产，高精度遥感监测应作为灾后恢复重建遗产地村寨生态环境与重建规模变化的重要手段。
关键词: 九寨沟地震/
世界自然遗产/
荷叶寨/
生态环境扰动/
遥感监测

Abstract:A M_S7.0 earthquake struck the Jiuzhaigou World Natural Heritage Site of Sichuan Province at southwest China on August 8^th 2017. The earthquake and its subsequent geological hazards such as landslides, collapses and debris flows had caused disturbances and damages to the ecological environment and villages in the heritage site. Environmental restoration and reconstruction work of the local villages within the heritage site have been carried out rapidly after the earthquake. To understand the impacts of the earthquake and the post-earthquake reconstruction activities, this article takes Heye Village and its surroundings area within the heritage as a study place. Google Earth remote sensing images before and after the earthquake are used to measure and interpret the changes of the geological hazards area and the scale of disaster management and reconstruction; and high-resolution Sentinel-2 Satellite remote sensing images taken on July 27^th 2017, September 7^th 2017 and August 3^rd 2019 are used to study the changes of vegetation coverage. The Google Earth images reveal that the post-earthquake collapse and landslide area have increased much bigger compared to their previous sites before the earthquake. However, because the village was built away from these sites, it was not devastated by the earthquake and its secondary geological hazards. The village was not relocated during the post-earthquake reconstruction process. Two landslide sites with an area of 1.5 hm² had been treated; the traffic availability of the village was further improved after the earthquake; the scale of the village was not expanded; the buildings destroyed during the earthquake were rebuilt on their previous sites; the land use only changed slightly with an open grassland of about 1 hm² having been converted into a temporary construction site in the study region after the earthquake. The Sentinel-2 Satellite images reveal that the earthquake had caused the development of 3 landslides in the vicinity of the Heye Village, and disturbed the vegetation growth at these sites. The proportion of high vegetation coverage area decreased from 91.98% before the earthquake to 91.09% after the earthquake, while the proportion of bare land-medium and low vegetation coverage area increased from 4.78% before the earthquake to 6.53% after the earthquake. Therefore, despite the earthquake and its subsequent geological hazards have caused some damage to the study region, the ecological status had been recovering after more than two years of reconstruction and restoration. To ensure the implementation of planning and to protect the world heritage site, high-resolution remote sensing technology should be used to monitor the post-earthquake ecological environment changes and the reconstruction scale of local villages.
Key words:Jiuzhaigou earthquake/
World Natural Heritage/
Heye Village/
ecological environment disturbance/
remote sensing monitoring



PDF全文下载地址:

http://www.dsjyj.com.cn/data/article/export-pdf?id=dsjyj_11830