Postseismic Restoration of the Ecological Environment in the Wenchuan Region Using Satellite Data
1
State Key Laboratory of Remote Sensing Science, Institute of Remote Sensing and Digital Earth of Chinese Academy of Sciences, Beijing 100101, China
2
College of Resource and Environment, University of Chinese Academy of Sciences, Beijing 100094, China
3
School of Life and Environmental Sciences, Schmid College of Science and Technology, Chapman University, Orange, CA 92866, USA
*
Authors to whom correspondence should be addressed.
Sustainability 2018, 10(11), 3990; https://doi.org/10.3390/su10113990
Received: 9 October 2018 / Revised: 25 October 2018 / Accepted: 25 October 2018 / Published: 1 November 2018
(This article belongs to the Special Issue Urban Remote Sensing: Sustainability of Earth’s Environment, Resources and Ecology)
Using Landsat remote-sensing data combined with geological information extracted from ALOS and Sentinel-1A radar data, the ecological environment was evaluated in the years 2007, 2008, 2013, and 2017 through gray correlation analysis on the basis of the construction of the pressure-state-response model. The main objective of this research was to assess the ecological environment changes in Wenchuan County before and after the earthquake, and to provide reference for future social development and policy implementation. The grading map of the ecological environment was obtained for every year, and the ecological restoration status of Wenchuan County after the earthquake was evaluated. The results showed that the maximum area cover at a “safe” ecological level was over 46.4% in 2007. After the 2008 earthquake, the proportion of “unsafe” and “very unsafe” ecological levels was 40.0%, especially around the Lancang River and the western mountain area in Wenchuan County. After five years of restoration, ecological conditions were improved, up to 48.0% in the region. The areas at “critically safe” and above recovered to 85.5% in 2017 within nine years after the deadly Wenchuan earthquake of May 12, 2008. In this paper, we discuss the results of detailed analysis of ecological improvements and correlation with the degrees of pressure, state, and response layers of the Pressure-State-Response (PSR) model.
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Keywords:
gray correlation analysis; ecological conditions; multisource remote-sensing data; Wenchuan earthquake; spatiotemporal analysis
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MDPI and ACS Style
Huang, Z.; Xu, M.; Chen, W.; Lin, X.; Cao, C.; Singh, R.P. Postseismic Restoration of the Ecological Environment in the Wenchuan Region Using Satellite Data. Sustainability 2018, 10, 3990. https://doi.org/10.3390/su10113990
AMA Style
Huang Z, Xu M, Chen W, Lin X, Cao C, Singh RP. Postseismic Restoration of the Ecological Environment in the Wenchuan Region Using Satellite Data. Sustainability. 2018; 10(11):3990. https://doi.org/10.3390/su10113990
Chicago/Turabian StyleHuang, Zhibin, Min Xu, Wei Chen, Xiaojuan Lin, Chunxiang Cao, and Ramesh P. Singh 2018. "Postseismic Restoration of the Ecological Environment in the Wenchuan Region Using Satellite Data" Sustainability 10, no. 11: 3990. https://doi.org/10.3390/su10113990
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