swamp
swamp
Wetlands are treeless shallow areas usually covered with water. They are transitionally between terrestrial and aquatic ecosystems. They are among the most biologically productive natural ecosystems in the world.
wetland, bottoms
Flats
A shallow place in a river is called a ford if it is used as a place to wade across to the other side. A shallow place can also be called a sandbar if the water does not cover all of the sand in a river or stream.
wetlands land or areas (as marshes or swamps) that are covered often intermittently with shallow water or have soil saturated with moisture -usually used in plural
marco
A lowland between hills and mountains is called a valley. Valleys are typically formed by the erosion of water or ice, and they often contain rivers or streams running through them.
river basin
Shallow parts of the sea or ocean are called shoals or shallows. They are areas where the water depth is relatively shallow, making them potentially hazardous for navigation.
riffle
It's called SILT