This research examines how individual preferences for the major functions of stream restoration processes are associated with flood prevention and risk mitigation in Johnson Creek of Portland, Oregon, USA. We first reviewed a set of results from an analytical hierarchy process (AHP) model to rank the major stream restoration functions and compared citizens' preferences for “flood prevention” using ordinary least squares regression. Our results show that the perceptions and interests of citizens may be centred on the inconvenience of everyday life arising from the previous flood events. Residents in the highly urbanized downstream regions showed a higher sensitivity to flooding than those living in the upper regions of the watershed. Community participation and annual incomes are positively related to flood risk perception in more developed downstream regions, while ecological or development goals associated with property protection are positively associated with higher flood risk perception in the less developed upper regions. Our findings of citizen perceptions can be adopted to help local government leaders and households mitigate flood risk while also achieving multiple benefits from stream restoration projects.

中文翻译：

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利用多准则决策分析，居民对洪水风险和城市河流恢复的感知

这项研究调查了美国俄勒冈州波特兰市约翰逊溪的河流恢复过程主要功能的个人偏好与洪水预防和风险缓解之间的关系。我们首先回顾了分析层次过程（AHP）模型的一组结果，以对主要的河流恢复功能进行排名，并使用普通最小二乘回归比较了市民对“防洪”的偏好。我们的结果表明，公民的看法和利益可能集中在先前洪水事件造成的日常生活不便。高度城市化的下游地区居民对洪灾的敏感性高于流域上游地区的居民。在较发达的下游地区，社区参与和年收入与洪水风险感知成正相关，而与财产保护相关的生态或发展目标与较不发达的上游地区对洪水风险的感知成正相关。我们对公民看法的发现可以被用来帮助地方政府领导人和家庭减轻洪水风险，同时也从溪流修复项目中获得多种收益。