Sea Level Rise and Compound Coastal-Fluvial Flooding along the Hudson River, NY
Abstract
Combined impacts from fluvial and coastal flooding in concert with sea level rise are a direct challenge to coastal adaptation. A compound coastal-fluvial flood and sea level rise risk, mapping and adaptation assessment has been performed for the Lower Hudson River valley. Coupled coastal and riverine flood models have been created and validated using 76 historical flood events. The flood models were run to create flood depth estimates for a combination of 10 sea level rise scenarios and 881 storms representing the climatology of coastal extratropical, inland extratropical, and tropical cyclone floods. Results were analyzed to provide flood hazard at return periods from 5-year to 1000-year for each sea level rise scenario. A complete set of building footprints and critical infrastructure data have been assembled for the region, with attributes appropriate for flood impact assessment, including occupancy class and imputed first-floor elevation. The Hazards U.S. (HAZUS) flood impact model was adapted to analyze flood impacts at the building level for the complete set of flood depth surfaces. Buildings within the flood impact zones have been flagged with appropriate adaptation scenarios based on advice from the NY Rising Community Reconstruction Committee Plans. Damage estimates have been calculated for municipalities in the study region. The results have been released as an open data collection, and an interactive mapping application has been published to allow researchers, government staff, and the public to access the results without the need for GIS or other desktop software.
- Publication:
-
AGU Fall Meeting Abstracts
- Pub Date:
- December 2022
- Bibcode:
- 2022AGUFMGC22B..05M