Cinematic 4K. An alluvial plain is a largely flat landform created by the deposition of sediment over a long period of time by one or more rivers coming from highland regions, from which alluvial soil forms. A floodplain is part of the process, being the smaller area over which the rivers flood at a particular period of time, whereas the alluvial plain is the larger area representing the region over which the floodplains have shifted over geological time. Rural houses and villages. Aerial panoramic pan field plantation arable cultivable agriculture agricultural farming cultivating plants soil cultivation growing tillage village dirt road brown overhead fly flight UHD 3840X2160