Water is the primary agent of erosion in a river system, as it transports sediment and wears down the riverbed and banks over time.

Dendritic is a type of drainage pattern, not a river channel pattern. Meandering, braided, and straight are all types of river channel patterns.

Watershed, catchment, and basin are all terms used to describe the area of land drained by a river and its tributaries.

Erosion is a natural process that occurs in river systems, but it can also be a problem when it leads to the loss of soil and damage to infrastructure.

Deposition is the process by which rivers deposit sediment, typically at the end of their course or when they slow down.

Canyon is a deep valley with steep sides, typically formed by the action of a river. Delta, estuary, and fiord are all types of river mouths.

Sinuosity is the term for the process by which rivers meander, or form bends and curves in their course.

Desert is a type of dry ecosystem, not a type of riverine wetland. Floodplain, marsh, and swamp are all types of riverine wetlands.

Floodplain is the area of land that is periodically flooded by a river, typically during the rainy season or when the river overflows its banks.

Natural erosion is a natural process that occurs in river systems, not a type of river pollution. Industrial waste, agricultural runoff, and sewage are all types of river pollution.

Transportation is the process by which rivers transport sediment, typically from upstream to downstream.

Desert is a type of dry ecosystem, not a type of riverine ecosystem. Floodplain forest, riparian forest, and wetland are all types of riverine ecosystems.

Riparian zone is the area of land that is located between a river and its floodplain, and is typically characterized by vegetation that is adapted to periodic flooding.

Deforestation is the clearing of forests, which can lead to increased erosion and flooding in river systems. Dams and reservoirs, levees and floodwalls, and riparian restoration are all types of river management strategies.

Erosion is the process by which rivers erode their banks, typically through the action of water and sediment.