- A wetland is a land area that is saturated with water, either permanently or seasonally, such that it takes on the characteristics of a distinct ecosystem.
- The water found in wetlands can be saltwater, freshwater, or brackish. Main wetland types include swamps, marshes, bogs and fens. Sub-types include mangrove, carr, pocosin, and varzea.
- Laguna de Rocha is the largest wetland in the urban area in Esteban Echeverría Partido, Argentina. Wetlands vary widely due to local and regional differences in topography, hydrology, vegetation, and other factors, including human involvement.
- Wetlands can be divided into two main classes: tidal and non-tidal areas.