What is the terrain of an estuary?

The terrain of an estuary typically features a mix of brackish water, tidal flats, mudflats, and salt marshes, shaped by the interaction of freshwater from rivers and saltwater from the ocean. These areas often include varying elevations, with gentle slopes leading to deeper channels. The sediment composition can include sand, silt, and clay, providing a diverse habitat for a range of plant and animal species. Estuaries also serve as crucial transition zones between terrestrial and marine ecosystems.