Dynamics and Change Features of the Eco-Environment Restoration in the Worst Hit Area of a Strong Earthquake

Abstract

The 2008 Sichuan Earthquake brought severe damage and long-lasting impact to the ecoenvironment in the disaster area. To restore and protect the eco-environment, it is important to grasp the eco-environmental situation of the disaster area in a rapid, accurate, and dynamic manner. With the aid of geographical information system (GIS), this paper extracts the key parameters of the eco-environment, and establishes an evaluation index system for ecoenvironment quality. On this basis, the eco-environment quality of the disaster area was evaluated based on the 2007-2017 Landsat remote sensing images, using the analytic network process (ANP). The results show that the eco-environment quality of the disaster area was improving, but the restoration process varied greatly around fault zone and on river banks, which should be the focal points of monitoring; the spatiotemporal difference in ecoenvironment restoration is mainly attributable to the development degree of secondary geological disasters, and indirectly caused by formation lithology; there was a huge gap between the restoration speeds of artificial restoration area and natural restoration area, but the gap narrowed over time. The research results provide the basis for scientific decision-making on eco-environment repair and restoration in places similar to the disaster area, promoting the green economy and living condition in those regions.

Thermal Equilibrium Analysis of Small-to-Medium River Ecosystems in Northern China under Multi-Factor Coupling and Decision-Making for Ecological Restoration

“…Despite abundant research on river ecological restoration, most methods have predominantly focused on ecological response analyses under single-factor influences, overlooking the intricate coupling of multiple factors [13][14][15][16][17][18][19]. Furthermore, traditional methodologies have often lacked in-depth exploration of microbial activity and bio-regulation, both of which play central roles in ecosystem thermal equilibrium status [20][21][22][23].…”

Study on the Evolution Law of Surface Landscape Pattern in Earthquake-Stricken Areas by Remote Sensing: A Case Study of Jiuzhaigou County, Sichuan Province

“…Therefore, the spatial-temporal evolution of land cover can be used to dynamically monitor the post-earthquake ecosystem recovery. It is of great scientific significance to study the restoration and reconstruction of the natural ecosystem and the sustainable development of the social economy in disaster areas [11][12][13].…”