Integrated Risk Assessment of Mountainous Hazards in Seismic Disastrous Areas of Sichuan Province After Wenchuan Earthquake

SU Peng-cheng; WEI Fang-qian; XU Ai-song; JIANG Yu-hong

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Integrated Risk Assessment of Mountainous Hazards in Seismic Disastrous Areas of Sichuan Province After Wenchuan Earthquake

- Integrated Risk Assessment of Mountainous Hazards in Seismic Disastrous Areas of Sichuan Province After Wenchuan Earthquake
- Bulletin of Soiland Water Conservation Vol. 30, Issue 1, Pages: 231-237(2011)
- 作者机构：
  
  1. 中国科学院山地灾害与地表过程重点实验室,四川,成都,610041
  2. 中国科学院水利部成都山地灾害与环境研究所,四川,成都,610041
  3. 中国科学院研究生院,北京,100039
- 作者简介：
- 基金信息：
- DOI：
  CLC： TV1
- Published：2011
- 稿件说明：
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SU Peng-cheng, WEI Fang-qian, XU Ai-song, et al. Integrated Risk Assessment of Mountainous Hazards in Seismic Disastrous Areas of Sichuan Province After Wenchuan Earthquake[J]. Bulletin of Soiland Water Conservation, 2011, 30(1): 231-237.
DOI：

SU Peng-cheng, WEI Fang-qian, XU Ai-song, et al. Integrated Risk Assessment of Mountainous Hazards in Seismic Disastrous Areas of Sichuan Province After Wenchuan Earthquake[J]. Bulletin of Soiland Water Conservation, 2011, 30(1): 231-237. DOI：

摘要

汶川地震触发了大量次生山地灾害

震后山地灾害活动风险对灾区的发展规划决策有着重要的参考价值.通过对四川境内震后灾区基础资料的分析和研究

分别对灾区的44个县(市)进行了山地灾害危险性、易损性和风险评价

并以震后灾害点密度对危险性评价结果进行了验证

结果发现二者之间具有线性函数关系.评价结果表明

高度危险区集中于龙门山断裂附近

并且呈现明显的带状分布

面积比例为39.8%;极高易损和高度易损区则主要分布于成都、绵阳、德阳、雅安等大城市周边地区

面积比例为13.1%;高度风险区则主要位于龙门山腹地向山前平原的过渡带

属于高度危险和高度易损的结合部位

面积比例为11.0%.高风险区是今后恢复重建和发展规划中需要重点关注的地区;中度风险区由于灾后恢复重建的推进

其承灾体的易损性将会上升

容易导致其向高度风险转化

也要给予重视.

Abstract

Wenchuan earthquake caused a variety of secondary mountainous hazards.Risk assessment regarding secondary hazards is therefore very important for reconstruction projects in the affected areas.Based on regional data analysis

assessments of dangerousness

vulnerability

and risk were carried out.A linear relationship was found between dangerousness degree and disaster density.Assessment results show that highly dangerous regions concentrated along Longmengshan fault

accounting for 39.8%of the total area.Regions of high and extremely high vulnerability mainly surrounded the cities of Chengdu

Mianyan

Deyang

and Ya'an

accounting for 13.1%of the total area.Regions of high risk

accounting for 11%of the total area

occupied the transitional zone between Longmeng Mountain and the piedmont plain

which had high dangerousness degree and high vulnerability

respectively.Special attention should be paid to the regions of high risk and vulnerability during the reconstruction.However

the regions of moderate should also be cared as the risk and vulnerability of these areas could be potentially deteriorated due to the rapid expansion of the reconstruction areas.

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