Lake Pontchartrain

Lake Pontchartrain is a large brackish estuary in southeastern Louisiana, north of New Orleans, connected to the Gulf of Mexico through tidal passes and Lake Borgne.

Lake Borgne: A shallow coastal lagoon east of New Orleans, linked to Lake Pontchartrain and the Gulf of Mexico. It forms part of the lake’s eastern connection to the Gulf.
Estuary: A coastal water body where freshwater from land mixes with saltwater from the sea. Lake Pontchartrain is an estuary despite being called a lake.
Lake Pontchartrain Causeway: A pair of parallel highway bridges spanning Lake Pontchartrain between Metairie and Mandeville, Louisiana. The causeway is the lake’s most prominent direct crossing.
Hurricane Katrina: A powerful Atlantic hurricane that struck the Gulf Coast in August 2005 and devastated New Orleans. Its storm surge tested defenses along Lake Pontchartrain’s southern shore.
New Canal Lighthouse: A historic lighthouse at the mouth of New Orleans’ New Canal on Lake Pontchartrain. It marks a historic entrance between the lake and the city’s canal network.
Rigolets: A tidal strait connecting Lake Pontchartrain with Lake Borgne in southeastern Louisiana. Tidal flow through this strait exchanges water between the lake and coastal lagoons.
Mississippi River Delta: A sediment-built landform at the mouth of the Mississippi River in Louisiana. The lake lies within the delta region’s low-lying coastal landscape.
Industrial Canal: A navigation and drainage canal linking the Mississippi River with Lake Pontchartrain in New Orleans. It connects the lake to New Orleans’ riverfront and port infrastructure.
Coastal erosion in Louisiana: The loss of Louisiana’s coastal land through erosion, subsidence, and reduced sediment supply. Wetland loss around the lake changes natural buffers against waves and surge.
Fontainebleau State Park: A Louisiana state park on Lake Pontchartrain’s north shore near Mandeville. Its shoreline preserves a public-facing example of the lake’s north-shore landscape.

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SeicheBroader topic: Its partly enclosed shape allows oscillations that can interact with winds and coastal water levels.