Storm surge induced flux through multiple tidal passes of Lake Pontchartrain estuary during Hurricanes Gustav and Ike

摘要: Abstract In September 2008, Hurricanes Gustav and Ike generated major storm surges which impacted the Lake Pontchartrain estuary in Louisiana. This paper presents analyses of situ measurements acquired during these events. The main data used were from three bottom mounted moorings equipped with conductivity, temperature, depth sensors, acoustic Doppler current profilers (ADCPs), a semi-permanent laterally horizontal profiler (ADP). These deployed tidal channels that connect coastal ocean. A process similar to straining was observed: vertical shear velocity negligible inundation stage, but 0.8 m/s over less than 5 m water column recorded receding 2–3 times normal oscillations. surge reached its peak Industrial Canal 1.4–2.1 h before those other two channels. inward flux lasted for shorter time period outward flux. also observed have much smaller magnitude (∼960–1200 vs. 2100–3100 million m 3 ). imbalance believed been caused by additional into through some small rivers land plus rainfall hurricanes. 8–12%, while passes ranged between 17% 70% total, mostly split roughly half-half remaining (∼88–92% total).