“5·12”汶川地震极重灾区生态服务功能恢复总体评估

doi:10.11870/cjlyzyyhj201604020

Abstract

Abstract: Since the super earthquake happened on May 12^th 2008 in WenChuan, ecosystems in WenChuan have significant been affected. The purpose of this research is to provide strategical supports for medium to long term ecological recovery monitoring ecological restoration. and three different time periods were assessed, including 2007 (before earthquake), 2009 (after earthquake), and 2013(restoration). The research adopts a lot of index number such as sensitivity of soil erosion, canopy interception, and suability of habitat condition to assess the status change among function of water and soil conservation, water conservation, and species diversity ten areas that were severely afflicted areas. The result shows that water and soil conservation, water conservation, and species diversity protective functions have been destroyed in study area after the earthquake. Overall, after five years to some extent the ecological service in the study area has recovered, while it was still short of the standard before the earthquake. Six cities (Wenchuan, Dujiangyan, Shifang, Pengzhou, Mianzhu, Anxian) located in central-south were have high degree of damage compare to other four cities. These areas are the dynamic districts of debris flow and landslide. Due to large amount of rainfall after the earthquake, landslide and debris flow caused the recovery rate of water conservation function and species diversity protective function decreased; including Caoping village, Yinxin village, and Gengda village, Wolong village, and Sanjiang village. In addition, the function of water conservation and species diversity protective function in Dujiangyan, Pengzhou, Shifang,Mianzhu, and Anxian were also slight declined. Although, the reconstruction of post-disaster to some extent has changed ecological function status and improved ecological function recovery progress, less maintained attention to ecological function recovery would become a problem to the whole project progress. For example, enforcement project of post-disaster reconstruction causes the ecological service function degraded in local area. Therefore this research provides two recommendations: 1) reinforcement of medium to long term ecological recovery remote sensing and ground monitor, as well as to provide the assessment of the effect of ecological function recovery in study area; 2) reinforcement of ecological restoration in key areas such as drought river- valley, Longmen Mountain, and Chaping Mountain etc.

Key words: Wenchuan earthquake, ecological services, ecological restoration, water and soil conservation function, water conservation function, species biodiversity

CLC Number:

X171.4

YANG Miao, XIE Qiang, FANG Zi-li, LIU Xiao-fu, LIAO Wei-yu, WANG Ping. ASSESSMENT OF “5.12” WENCHUAN EARTHQUAKE RESTORATION: ECOLOGICAL SERVICES FUNCTION IN SEVERELY AFFLICTED AREAS[J].RESOURCES AND ENVIRONMENT IN THE YANGTZE BASIN, 2016, 25(04): 685-694.

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ASSESSMENT OF “5.12” WENCHUAN EARTHQUAKE RESTORATION: ECOLOGICAL SERVICES FUNCTION IN SEVERELY AFFLICTED AREAS

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