Which flood control method involves the construction of barriers along riverbanks?

Levees are designed specifically to manage floodwaters by acting as barriers along riverbanks. They are constructed to prevent rivers from overflowing during periods of high water, thereby protecting surrounding land and infrastructure from flooding. By elevating the bank of a river, levees can help direct the flow of water back into the river channel, reducing the risk of inundation in adjacent areas.

In contrast, dams primarily focus on controlling water flow and storage by blocking rivers to create reservoirs, thus playing a different role in water management. Reservoirs are bodies of water created by storing water behind a dam, which can also mitigate floods to an extent but do not directly involve building barriers along riverbanks. Afforestation involves planting trees to improve the environment and manage water runoff but does not directly create physical barriers to flooding like levees do.