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首页> 外文期刊>Environmental & Resource Economics >Decentralized Management Hinders Coastal Climate Adaptation: The Spatial-dynamics of Beach Nourishment
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Decentralized Management Hinders Coastal Climate Adaptation: The Spatial-dynamics of Beach Nourishment

机译：分散管理阻碍了沿海气候的适应：海滩营养的空间动力学

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摘要

Climate change threatens to alter coastline erosion patterns in space and time and coastal communities adapt to these threats with decentralized shoreline stabilization measures. We model interactions between two neighboring towns, and explore welfare implications of spatial-dynamic feedbacks in the coastal zone. When communities are adjacent, the community with a wider beach loses sand to the community with a narrower beach through alongshore sediment transport. Spatial-dynamic feedbacks create incentives for both communities to nourish less, resulting in lower long-run beach width and lower property values in both communities, a result that parallels the classic prisoner's dilemma. Intensifying erosion-consistent with accelerating sea level rise-increases the losses from failure to coordinate. Higher erosion also increases inequality in the distribution of benefits across communities under spatially coordinated management. This disincentive to coordinate suggests the need for higher-level government intervention to address a traditionally local problem. We show that a spatially targeted subsidy can achieve the first best outcome, and explore conditions under which a second-best uniform subsidy leads to small or large losses.
机译：气候变化有可能改变时空上的海岸线侵蚀方式，沿海社区通过分散的海岸线稳定措施来适应这些威胁。我们对两个相邻城镇之间的互动进行建模，并探索沿海地区空间动态反馈的福利意义。当社区相邻时，海滩较宽的社区通过沿岸沉积物的运输将沙子输给海滩较窄的社区。空间动力反馈为两个社区减少营养提供了动力，导致两个社区的长期海滩宽度降低和财产价值降低，这与经典囚徒的困境相似。加剧的侵蚀与加速的海平面上升相一致，增加了因无法协调而造成的损失。在空间协调管理下，更高程度的侵蚀还会加剧社区之间利益分配的不平等。这种对协调的抑制作用表明，需要政府的高层干预来解决传统上的地方问题。我们表明，以空间为目标的补贴可以取得第一佳的结果，并探索在第二最佳的统一补贴导致较小或较大损失的条件。

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