Remote sensing dynamic monitoring of Chinese Academy of Sciences: risk elimination of dammed lake in Wenchuan earthquake area

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 Remote sensing dynamic monitoring of Chinese Academy of Sciences: risk elimination of dammed lake in Wenchuan earthquake area


Data map: the Wenchuan earthquake site of aerial photograph. Liu Zhongjun 2018 is the Wenchuan earthquake 10th anniversary, in order to systematically monitor the environmental changes in the earthquake stricken areas and the progress of post disaster reconstruction for the past 10 years, the Academy of strategic pilot science and technology of the Academy of Sciences, the earth big data scientific engineering, launched the Wenchuan earthquake 10th anniversary remote sensing dynamic monitoring in March. The researchers are based on the multi-phase and massive satellite data of the 10 years. As well as the aerial observation data obtained by aerial remote sensing aircraft and UAV, the dynamic change of Wenchuan after the earthquake is recognized by spatial remote sensing, and the process of ecological environment recovery is evaluated comprehensively. On the monitoring of the barrier lake, 36 main barrier lakes in the Wenchuan earthquake area were continuously monitored. By 2013, after 5 years of engineering risk, natural outburst and overflow scour, 30 of the dammed lakes were completely dredged and 6 were not completely dredged. The researchers used high satellite and aerial remote sensing images to again undredge the barrier lake. Remote sensing monitoring shows that the dam is not stable. By 2018, the risk of damming Lake in Wenchuan earthquake area has been basically eliminated, the largest dam of Tang Jiashan dammed lake is stable, the downstream river has been dredged, and it has become a scenic area and important water conservancy facilities, and it has basically solved the impact of earthquake dammed lake on local residents life. It is suggested that we should further scientifically plan related dammed lakes and develop characteristic tourism. As for the major landslides and debris flow disasters, the monitoring of 5 large landslides found that as of 2018, the overall condition of the vegetation coverage of the landslides of the large landslides was good, and the intensity of the landslide activity showed a significant downward trend. During the 10 years, the Wenchuan earthquake area reduced the activity of geological disasters by adopting corresponding protective measures such as slope cutting, unloading and vegetation restoration. Researchers warn that new landslides and disasters still exist. We need to continue to identify and monitor disaster risks. In the field of ecological restoration monitoring, the dynamic monitoring and evaluation of the Wenchuan earthquake area and Sichuan giant panda habitat showed that the vegetation coverage after the earthquake increased significantly, and the soil erosion status was gradually improved. It is suggested that ecological restoration measures should be continued to reduce vegetation damage and soil erosion, and to support the sustainable and benign restoration of the ecological environment and the habitat of giant pandas. In the area of urban reconstruction in the disaster area, the researchers analyzed the status of the construction area in Shifang, Mianzhu and Anxian (now Anzhou District), and considered that the reconstruction and standardization of the urban construction and the modernization of the public facilities were remarkable. We should not build scientifically, give consideration to the collaborative design of ecological protection and disaster reduction, and form a sustainable capacity for urban construction and development. This article is from China News Network: Sun Zi FA editor: Shao Xiaobo _NN2479