California’s coastal development: Sea-level rise and extreme events — where do we go from here?

Shore & Beach Pub Date : 2019-06-18 DOI:10.34237/1008722
G. Griggs, Kiki Patsch
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引用次数: 6

Abstract

As sea level continues to rise at an accelerated rate, California’s intensive coastal development and infrastructure is coming under an increasing threat. Whether lowelevation shoreline areas that are subject to flooding at extreme tides and times of storm wave run-up, or construction on eroding bluffs or cliffs, the risks will continue to increase from extreme events but, over the longer term, from continuing sea-level rise. Future sea-level rise values under different greenhouse gas scenarios have recently been projected and adopted by the state to be used in coastal land use planning and decision making. While beach nourishment can provide very short-term protection, and seawalls and revetments can provide somewhat longer-term protection, they both come with significant costs and also environmental impacts. The era of routine armor emplacement is coming to an end in California, and whether designated as relocation or managed retreat, now is the time to make the difficult decisions on how this will be accomplished and what the trigger points will be to initiate the response.
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加州沿海发展:海平面上升和极端事件——我们该何去何从?
随着海平面继续加速上升,加州密集的沿海开发和基础设施正面临越来越大的威胁。无论是在极端潮汐和风暴潮上升时容易发生洪水的低海拔海岸线地区,还是在侵蚀的悬崖或悬崖上施工,极端事件的风险将继续增加,但从长远来看,海平面持续上升的风险将继续增加。最近,不同温室气体情景下的未来海平面上升值被预测并被国家采用,用于沿海土地利用规划和决策。虽然海滩营养可以提供非常短期的保护,而海堤和护岸可以提供某种程度上的长期保护,但它们都有巨大的成本和环境影响。在加利福尼亚,常规装甲阵地的时代即将结束,无论是指定搬迁还是管理撤退,现在是时候做出艰难的决定了,即如何完成这一决定,以及启动反应的触发点是什么。
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