气候变化领域集成服务门户(CCPortal): Economic evaluation of sea-level rise adaptation strongly influenced by hydrodynamic feedbacks

CCPortal

DOI	10.1073/pnas.2025961118
	Economic evaluation of sea-level rise adaptation strongly influenced by hydrodynamic feedbacks
	Hummel M.A.; Griffin R.; Arkema K.; Guerry A.D.
发表日期	2021
ISSN	0027-8424
卷号	118 期号:29
英文摘要	Coastal communities rely on levees and seawalls as critical protection against sea-level rise; in the United States alone, $300 billion in shoreline armoring costs are forecast by 2100. However, despite the local flood risk reduction benefits, these structures can exacerbate flooding and associated damages along other parts of the shoreline—particularly in coastal bays and estuaries, where nearly 500 million people globally are at risk from sea-level rise. The magnitude and spatial distribution of the economic impact of this dynamic, however, are poorly understood. Here we combine hydrodynamic and economic models to assess the extent of both local and regional flooding and damages expected from a range of shoreline protection and sea-level rise scenarios in San Francisco Bay, California. We find that protection of individual shoreline segments (5 to 75 km) can increase flooding in other areas by as much as 36 million m3 and damages by $723 million for a single flood event and in some cases can even cause regional flood damages that exceed the local damages prevented from protection. We also demonstrate that strategic flooding of certain shoreline segments, such as those with gradually sloping baylands and space for water storage, can help alleviate flooding and damages along other stretches of the coastline. By matching the scale of the economic assessment to the scale of the threat, we reveal the previously uncounted costs associated with uncoordinated adaptation actions and demonstrate that a regional planning perspective is essential for reducing shared risk and wisely spending adaptation resources in coastal bays. © 2021 National Academy of Sciences. All rights reserved.
英文关键词	Adaptation; Economic damages; Externalities; Flooding; Sea-level rise
语种	英语
来源期刊	Proceedings of the National Academy of Sciences of the United States of America
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/238684
作者单位	Department of Civil Engineering, University of Texas at Arlington, Arlington, TX 76019, United States; Natural Capital Project, Stanford University, Stanford, CA 94305, United States; School for Marine Science and Technology, University of Massachusetts Dartmouth, Dartmouth, MA 02747, United States; School of Environmental and Forest Sciences, University of Washington, Seattle, WA 98195, United States
推荐引用方式 GB/T 7714	Hummel M.A.,Griffin R.,Arkema K.,et al. Economic evaluation of sea-level rise adaptation strongly influenced by hydrodynamic feedbacks[J],2021,118(29).
APA	Hummel M.A.,Griffin R.,Arkema K.,&Guerry A.D..(2021).Economic evaluation of sea-level rise adaptation strongly influenced by hydrodynamic feedbacks.Proceedings of the National Academy of Sciences of the United States of America,118(29).
MLA	Hummel M.A.,et al."Economic evaluation of sea-level rise adaptation strongly influenced by hydrodynamic feedbacks".Proceedings of the National Academy of Sciences of the United States of America 118.29(2021).