气候变化领域集成服务门户(CCPortal): Optimized river diversion scenarios promote sustainability of urbanized deltas

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DOI	10.1073/pnas.2101649118
	Optimized river diversion scenarios promote sustainability of urbanized deltas
	Moodie A.J.; Nittrouer J.A.
发表日期	2021
ISSN	0027-8424
卷号	118 期号:27
英文摘要	Socioeconomic viability of fluvial-deltaic systems is limited by natural processes of these dynamic landforms. An especially impactful occurrence is avulsion, whereby channels unpredictably shift course. We construct a numerical model to simulate artificial diversions, which are engineered to prevent channel avulsion, and direct sediment-laden water to the coastline, thus mitigating land loss. We provide a framework that identifies the optimal balance between river diversion cost and civil disruption by flooding. Diversions near the river outlet are not sustainable, because they neither reduce avulsion frequency nor effectively deliver sediment to the coast; alternatively, diversions located halfway to the delta apex maximize landscape stability while minimizing costs. We determine that delta urbanization generates a positive feedback: infrastructure development justifies sustainability and enhanced landform preservation vis-à-vis diversions. © 2021 National Academy of Sciences. All rights reserved.
英文关键词	Avulsion; Delta sustainability; River deltas; River diversion
语种	英语
scopus关键词	Article; coastal waters; environmental economics; environmental factor; environmental sustainability; landscape; mathematical computing; process optimization; river ecosystem; sediment; surface property; urbanization
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/238700
作者单位	Department of Earth, Environmental and Planetary Sciences, Rice University, Houston, TX 77005, United States; Department of Civil, Architectural and Environmental Engineering, University of Texas at Austin, Austin, TX 78712, United States; Department of Geosciences, Texas Tech University, Lubbock, TX 79409, United States
推荐引用方式 GB/T 7714	Moodie A.J.,Nittrouer J.A.. Optimized river diversion scenarios promote sustainability of urbanized deltas[J],2021,118(27).
APA	Moodie A.J.,&Nittrouer J.A..(2021).Optimized river diversion scenarios promote sustainability of urbanized deltas.Proceedings of the National Academy of Sciences of the United States of America,118(27).
MLA	Moodie A.J.,et al."Optimized river diversion scenarios promote sustainability of urbanized deltas".Proceedings of the National Academy of Sciences of the United States of America 118.27(2021).