气候变化领域集成服务门户(CCPortal): Tide-Storm Surge Interactions in Highly Altered Estuaries: How Channel Deepening Increases Surge Vulnerability

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DOI	10.1029/2019JC015286
	Tide-Storm Surge Interactions in Highly Altered Estuaries: How Channel Deepening Increases Surge Vulnerability
	Familkhalili R.; Talke S.A.; Jay D.A.
发表日期	2020
ISSN	21699275
卷号	125 期号:4
英文摘要	We develop idealized analytical and numerical models to study how storm surge amplitudes vary within frictional, weakly convergent, nonreflective estuaries. Friction is treated using Chebyshev polynomials. Storm surge is represented as the sum of two sinusoidal components, and a third constituent represents the semidiurnal tide (D2). An empirical fit of storm surge shows that two sinusoidal components adequately represent storm surge above a baseline value (R2 = 0.97). We find that the spatial transformation of surge amplitudes depends on the depth of the estuary, and characteristics of the surge wave including time scale, amplitude, asymmetry, and surge-tide relative phase. Analytical model results indicate that surge amplitude decays more slowly (larger e-folding) in a deeper channel for all surge time scales (12–72 hr). Deepening of an estuary results in larger surge amplitudes. Sensitivity studies show that surges with larger primary amplitudes (or shorter time scales) damp faster than those with smaller amplitudes (or larger time scales). Moreover, results imply that there is a location with maximum sensitivity to altered depth, offshore surge amplitude, and time scale and that the location of observed maximum change in surge amplitude along an estuary of simple form moves upstream when depth is increased. Further, the relative phase of surge to tide and surge asymmetry can change the spatial location of maximum change in surge. The largest change due to increased depth occurs for a large surge with a short time scale. The results suggest that both sea level rise and channel deepening may also alter surge amplitudes. ©2020. American Geophysical Union. All Rights Reserved.
英文关键词	analytical model; channel deepening; estuary; storm surge; tides
语种	英语
来源期刊	Journal of Geophysical Research: Oceans
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/186906
作者单位	Department of Civil and Environmental Engineering, Portland State University, Portland, OR, United States; Department of Civil and Environmental Engineering, California Polytechnic State University, San Luis Obispo, CA, United States
推荐引用方式 GB/T 7714	Familkhalili R.,Talke S.A.,Jay D.A.. Tide-Storm Surge Interactions in Highly Altered Estuaries: How Channel Deepening Increases Surge Vulnerability[J],2020,125(4).
APA	Familkhalili R.,Talke S.A.,&Jay D.A..(2020).Tide-Storm Surge Interactions in Highly Altered Estuaries: How Channel Deepening Increases Surge Vulnerability.Journal of Geophysical Research: Oceans,125(4).
MLA	Familkhalili R.,et al."Tide-Storm Surge Interactions in Highly Altered Estuaries: How Channel Deepening Increases Surge Vulnerability".Journal of Geophysical Research: Oceans 125.4(2020).