Man made features of a river?

Dams: Dams are structures built across rivers to control the flow of water. They can be used to generate hydroelectric power, provide flood control, or create reservoirs for water storage or recreation.

Levees: Levees are embankments built along the banks of rivers to prevent flooding. They can be made of earth, concrete, or other materials.

Canals: Canals are artificial waterways that are dug to connect two or more bodies of water. They can be used for transportation, irrigation, or drainage.

Bridges: Bridges are structures built over rivers to allow people and vehicles to cross. They can be made of wood, concrete, steel, or other materials.

Locks: Locks are devices that allow boats to travel between bodies of water at different elevations. They work by raising or lowering water levels in a chamber, allowing boats to pass through.

Fish ladders: Fish ladders are devices that allow fish to migrate past dams or other obstacles. They consist of a series of pools that the fish can swim up to reach the higher water level.

Recreation facilities: Recreation facilities such as boat ramps, fishing piers, and swimming areas can be built along rivers for public enjoyment.