Integration of inland and coastal storms for flood hazard assessment using a distributed hydrologic model

Due to increasing flood severities and frequencies, studies on coastal vulnerability assessment are of increasing concern. Evaluation of flood inundation depth and extent is the first issue in flood vulnerability analysis. This study has proposed a practical framework for reliable coastal floodplain...

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Bibliographic Details
Published in:Environmental earth sciences 2017-06, Vol.76 (11), p.1, Article 395
Main Authors: Karamouz, Mohammad, Razmi, Ali, Nazif, Sara, Zahmatkesh, Zahra
Format: Article
Language:English
Subjects:
Biogeosciences
Case studies
Coastal engineering
Coastal flooding
Coastal storms
Communities
Computer simulation
Delineation
Depth
Earth and Environmental Science
Earth Sciences
Engineers
Environmental Science and Engineering
Evaluation
Flood hazards
Flooding
Floodplains
Floods
Frameworks
Geochemistry
Geology
Hazard assessment
Hurricanes
Hydrologic models
Hydrology
Hydrology/Water Resources
Integration
Methods
Original Article
Rain
Rainfall
Storm surges
Storms
System reliability
Terrestrial Pollution
Tidal waves
Urban areas
Vulnerability
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Summary:Due to increasing flood severities and frequencies, studies on coastal vulnerability assessment are of increasing concern. Evaluation of flood inundation depth and extent is the first issue in flood vulnerability analysis. This study has proposed a practical framework for reliable coastal floodplain delineation considering both inland and coastal flooding. New York City (NYC) has been considered as the case study because of its vulnerability to storm surge-induced hazards. For floodplain delineation, a distributed hydrologic model is used. In the proposed method, the severities of combined inland and coastal floods for different recurrence intervals are determined. Through analyzing past storms in the study region, a referenced (base) configuration of rainfall and storm surge is selected to be used for defining flood scenarios with different return periods. The inundated areas are determined under different flooding scenarios. The inundation maps of 2012 superstorm Sandy in NYC is simulated and compared with the FEMA revised maps which shows a close agreement. This methodology could be of significant value to the planners and engineers working on the preparedness of coastal urban communities against storms by providing a platform for updating inundation maps as new events are observed and new information becomes available.
ISSN:1866-6280
1866-6299
DOI:10.1007/s12665-017-6722-6