Novel framework for assessing long‐term flood risk management pathways focusing on river channel improvement and amenity policies

Novel framework for assessing long‐term flood risk management pathways focusing on river channel improvement and amenity policies
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评估长期洪水风险管理路径的新框架,重点关注河道改善和便利政策

DOI:
10.1111/jfr3.12804
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发表时间:
2022
影响因子:
4.1
通讯作者:
Y.
Y.
中科院分区:
环境科学与生态学3区
文献类型:
--
作者:
Tanaka;T.;Yokomatsu;M.;Ashino;M.;& Ichikawa;Y.

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许多城市地区由于气候变化而面临更高的洪水风险,减轻这些风险需要结构性和非结构性适应措施相结合。以前评估适应措施的研究在量化气候和社会变化的影响方面是有限的。作为一种跨学科的研究方法,本研究开发了一个基于主体的家庭区位选择模型,并结合了一种先进的方法来推导现场分析洪水风险曲线(90米分辨率),以明确反映当前/未来洪水风险对洪水保险费率的影响。为了评估河道改善和美化政策,提出的框架应用于日本Yodo河流域的中流地区。模拟结果表明:(1)设计水平和河道改善都会影响洪水风险;(2)在低风险区和无风险区上开发更广泛的区域,而不是集中引入有限的无风险区,可以更有效地降低洪水风险。此外,(3)适当的美化政策可以通过改善路径来减弱区域间洪水风险的不均衡性。提出的跨学科方法将有助于决策者进行长期的洪水风险管理。
Many urban areas at higher flood risk owing to climate change, and mitigating these risks requires a combination of structural and nonstructural adaptation measures. Previous studies assessing adaptation measures are limited in quantifying the effects of climatic and social changes. As an interdisciplinary approach, this study developed an agent‐based model of household locational choices and combined an advanced method for deriving on‐site analytical flood risk curves (90 m resolution) to explicitly reflect the present/future flood risk on the flood insurance rate. To evaluate river channel improvements and amenity policies, the proposed framework was applied to a middle stream area of the Yodo River basin, Japan. The simulation results indicated that (1) both the design level and river pathway improvements influence the flood risk (2) developing wider areas over low‐ and no‐risk areas rather than the intensive induction to limited no‐risk areas lead to a more effective reduction in flood risk. In addition, (3) an appropriate amenity policy may contribute to the attenuation of the inequality of flood risk among regions owing to the pathway of improvement. The proposed interdisciplinary approach will help decision makers in long‐term flood risk management.
利用概率降雨模型和大型集合气候模拟数据开发洪水风险曲线:淀河流域案例研究
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