摘要
为从城市规划阶段开始对自然灾害进行有针对性的防灾减灾,首先构建基于土地利用格局的自然灾害风险评价模型,建立基于灾害损失系数、应急体系能力和灾后重建难度系数的函数。然后,根据沿海地区灾害特点和受灾体格局,充分考虑社会和经济因素,分别建立灾害损失系数,应急体系能力和灾后重建难度系数的子函数。以江苏南通市为例,分别计算老城区,新城区和开发区的自然灾害风险。结果显示,应急体系不健全且经济落后的老城区建设用地受次生危险源格局影响较大;应急体系健全且经济发达的主城区中心区域灾害风险较小,但城市建成区边缘风险较大;发展迅速但应急体系不健全的新城区自然灾害风险也较大。根据各区的规划特点,提出针对南通市不同区域发展特点的减灾措施。
In order to begin to prevent and mitigate natural disaster from the city planning stage, based on land use pattern, a natural disaster risk assesment model was built, which is constituted by disaster loss index, emergency system capacity and reconstruction difficulty index. According to coastal disaster charac- ters and affected body＇s pattern, considering social and economic factors, sub functions about the three indexes were structured. Then, applying the model, the disaster risks in old urban region, main urban region and new urban region in Nantong city were calculated. The results show the disaster risk in old urban region, with imperfect emergency system and underdeveloped economy, is affected mainly by the secondary dangerous sources. The main urban region, with perfect emergency system and developed econ- omy, holds a lower risk in the center, but on the edge of built-up district there is a high disaster risk. The new urban region, with imperfect emergency system and rapid development, holds a high disaster risk. Some natural mitigation measures were proposed in Nantong city.
出处
《中国安全科学学报》
CAS
CSCD
北大核心
2013年第4期96-101,共6页
China Safety Science Journal
基金
国家自然科学基金资助(41001355)
