Coastal lowlands are flat, low-lying areas near the coast, often where rivers meet the sea forming deltas and floodplains. Their low elevation makes them vulnerable to flooding, erosion, and storm surges.
Shaped by sediment deposition, waves, and tides, they feature beaches, dunes, salt marshes, and mangroves—supporting diverse ecosystems and human activities (fisheries, agriculture, tourism).
Managing these areas is critical amid rising seas and intensifying storms.