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Estuarine hurricane wind can intensify surge-dominated extreme water level in shallow and converging coastal systems

Journal Article · · Natural Hazards and Earth System Sciences (Online)
 [1];  [2];  [1];  [3];  [1];  [1];  [1]
  1. Pacific Northwest National Laboratory (PNNL), Richland, WA (United States)
  2. Los Alamos National Laboratory (LANL), Los Alamos, NM (United States)
  3. Pacific Northwest National Laboratory (PNNL), Richland, WA (United States); University of Washington, Seattle, WA (United States)
Based on the projected increase in hurricane landfall frequency on the middle to lower US east coast, we examined the crucial role of the estuarine wind field in exacerbating coastal flooding. A regionally refined atmospheric and two high-resolution hydrology and ocean models are integrated to provide plausible and physically consistent ensembles of hurricane events and the associated flooding inside the Delaware Bay and River, a US mid-Atlantic estuary. Model results show that the hurricane propagation direction, estuarine geometry, remote surge from the open ocean, and direct nearshore upwind stress could magnify the flood magnitude. More specifically, inland-bound tracks that make landfall before reaching the mid-Atlantic coast produce a more significant surge within Delaware Bay than the shore-parallel tracks, where the estuarine wind direction plays the primary role in surge amplification. Ultimately, this study emphasized the need for integrated models to capture the nonlinear dynamics and interactions in flood hazard modeling.
Research Organization:
Pacific Northwest National Laboratory (PNNL), Richland, WA (United States)
Sponsoring Organization:
USDOE Office of Science (SC), Biological and Environmental Research (BER). Earth And Environmental Systems Science (EESS)
Grant/Contract Number:
AC05-76RL01830
OSTI ID:
2462752
Alternate ID(s):
OSTI ID: 2480444
Report Number(s):
PNNL-SA--185744
Journal Information:
Natural Hazards and Earth System Sciences (Online), Journal Name: Natural Hazards and Earth System Sciences (Online) Journal Issue: 7 Vol. 24; ISSN 1684-9981
Publisher:
Copernicus Publications, EGUCopyright Statement
Country of Publication:
United States
Language:
English

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