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Vegetation Restoration Monitoring in Yingxiu Landslide Area after the 2008 Wenchuan Earthquake
HE Jing1,2, ZHANG Keke3, LIU Xiuju4, LIU Gang1,2, ZHAO Xuqiang1, XIE Zhongyuan1, LU Heng5,6
1.College of Earth Sciences, Chengdu University of Technology, Chengdu 610059, China;2.State Key Laboratory of Geohazard Prevention and Geoenvironment Protection, Chengdu University of Technology, Chengdu 610059, China;3.China Petroleum Engineering and Construction Corp. Southwest Company, Chengdu 610017, China;4.Chengdu Planning Information Technic Center, Chengdu 610042, China;5.State Key Laboratory of Hydraulics and Mountain River Engineering, Sichuan University, Chengdu 610065, China;6.College of Hydraulic and Hydroelectric Engineering, Sichuan University, Chengdu 610065, China
摘要:
A total of more than 50 000 landslides has occurred in Sichuan province since the "5·12" Wenchuan earthquake, resulting in serious damage to the surface vegetation in southwestern China. In this study,we select Yingxiu, the epicenter of Wenchuan earthquake, as the experimental area. The vegetation coverage information of the experimental area is extracted from the remote sensing images collected in the year of 2005, 2011 and 2013, respectively. The surface vegetation coverage in different periods is analyzed, and the vegetation recovery rate of the whole area is calculated. The experimental results show that in the first three years after the earthquake, the speed of vegetation restoration is slow, and the vegetation coverage rate is less than 20% better than 0.241, while in 2013, the vegetation coverage increases significantly.
关键词:  Wenchuan earthquake  Yingxiu landslide area  NDVI  Vegetation restoration
DOI:10.19743/j.cnki.0891-4176.202001007
分类号:
基金项目:This research was supported by the National Key R&D Program of China (2019YFC1510700), the National Natural Science Foundation of China (41602355,41701499), the Sichuan Science and Technology Program (2018GZ0265), Chengdu University of Technology Backbone Teacher Program(2019SJ01-04230) and Special earthquake science and technology project of Sichuan Seismological Bureau (LY1814).
Vegetation Restoration Monitoring in Yingxiu Landslide Area after the 2008 Wenchuan Earthquake
HE Jing1,2, ZHANG Keke3, LIU Xiuju4, LIU Gang1,2, ZHAO Xuqiang1, XIE Zhongyuan1, LU Heng5,6
1.College of Earth Sciences, Chengdu University of Technology, Chengdu 610059, China;2.State Key Laboratory of Geohazard Prevention and Geoenvironment Protection, Chengdu University of Technology, Chengdu 610059, China;3.China Petroleum Engineering and Construction Corp. Southwest Company, Chengdu 610017, China;4.Chengdu Planning Information Technic Center, Chengdu 610042, China;5.State Key Laboratory of Hydraulics and Mountain River Engineering, Sichuan University, Chengdu 610065, China;6.College of Hydraulic and Hydroelectric Engineering, Sichuan University, Chengdu 610065, China
Abstract:
A total of more than 50 000 landslides has occurred in Sichuan province since the "5·12" Wenchuan earthquake, resulting in serious damage to the surface vegetation in southwestern China. In this study,we select Yingxiu, the epicenter of Wenchuan earthquake, as the experimental area. The vegetation coverage information of the experimental area is extracted from the remote sensing images collected in the year of 2005, 2011 and 2013, respectively. The surface vegetation coverage in different periods is analyzed, and the vegetation recovery rate of the whole area is calculated. The experimental results show that in the first three years after the earthquake, the speed of vegetation restoration is slow, and the vegetation coverage rate is less than 20% better than 0.241, while in 2013, the vegetation coverage increases significantly.
Key words:  Wenchuan earthquake  Yingxiu landslide area  NDVI  Vegetation restoration