Journal of Sichuan University (Natural Science Edition)
Topographic factors; ecosystem service function factors; ecological restoration after earthquake disaster;
In this study, topographic factors such as elevation, slope, biodiversity, water conservation and other ecosystem service factors are considered comprehensively and rapidly to evaluate the effect of ecosystem restoration after the earthquake, and to explore a new method for evaluating ecological restoration after the earthquake. Taking the ecological restoration of Dujiangyan in the "5.12" Wenchuan earthquake as an example, the key ecological problems caused by the earthquake and secondary disasters are synthesized and the key ecological problems are established. The results show that compared with 2005, the total area of ecological land decreased by 12.88 km~2 in 2011, and the land use types before and after earthquakes have obviously shifted to construction land. The change rate of the importance of key ecological land is geological hazards > water conservation > biodiversity. In the third year after the earthquake, the indicators of biodiversity, water conservation and geological hazards have been restored. More than before the earthquake, most of the losses occurred in the northwest area of Dujiangyan, where landslides and debris flows occurred frequently.