Coastal windstorms create unsteady, unpredictable storm surges in a fluvial Maine estuary

Storm surges create coastal flooding that can be damaging to life and property. In estuaries with significant river influence (fluvial), it is possible for tides, storm surge, discharge interact enhance relative the immediate coast. These tide-surge-river interactions were previously identified in a fluvial Maine estuary as higher frequency (>four cycles per day) oscillations surge which proposed incited by enhanced friction resonance during certain windstorm events (Spicer et al. 2019). The contributions interaction from atmospheric forcing variables (wind, barometric pressure, externally generated surge) remains unclear. This work seeks decompose analyze recent event better isolate effects of on tidesurge- interaction. Results show total two times larger than at mouth because Analysis indicated least 50% magnitude are created non-tidal forcing, form wind, enhancing frictional energy estuary. remaining likely result changes tidal wave propagation speed due deepening mean water level.