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Coastal flooding along the Atlantic Seaboard is a significant natural hazard caused by various meteorological and oceanographic phenomena. Understanding the science behind storm surges and tidal waves helps in assessing risks and preparing for potential impacts.
Storm Surges
A storm surge is an abnormal rise in seawater level caused by a storm’s winds pushing water toward the coast. It is most common during hurricanes and tropical storms. The surge can significantly increase water levels, leading to flooding in coastal areas.
The height of a storm surge depends on several factors, including storm intensity, size, speed, and the shape of the coastline. Low-lying areas are particularly vulnerable to surge-related flooding.
Tidal Waves and Tides
Tidal waves, often confused with tsunamis, are actually large oceanic waves caused by the gravitational pull of the moon and the sun. Tides are regular, predictable rises and falls in sea level that occur twice daily along the Atlantic Seaboard.
Extreme tidal conditions, combined with other factors like storm surges, can exacerbate flooding. Tidal peaks can elevate water levels, making coastal areas more susceptible to inundation during storms.
Factors Influencing Coastal Flooding
Several elements influence the severity of coastal flooding along the Atlantic Seaboard:
- Storm intensity and track
- Coastal topography and bathymetry
- Sea level rise due to climate change
- Wind direction and speed
- Timing of high tide