A floodplain is a natural geographical area that lies adjacent to a river or other large body of water, characterized by periodic flooding during high-water events. These environments are critical transitional zones, formed over time by the deposition of sediment—such as alluvium—when the water's energy decreases as it moves away from the main channel. Hydrologically, floodplains act as temporary storage areas during periods of excess water flow, which helps regulate downstream river levels and recharge groundwater reserves. Ecologically, the deposited sediments create diverse substrates and support unique riparian vegetation, resulting in high biodiversity. The cyclical deposition and reworking of fertile soils make these areas vital for supporting specialized flora and fauna adapted to periodic inundation.