Flood plains form when the discharge of the river channel exceeds it's capacity. In relatively flat floodplains, areas may remain inundated for days or even weeks, but floodwaters are typically slow-moving and shallow. Figure 1. This material is then deposited on this flat land and builds up over many years/flood events thus forming a flood plain. to describe the characteristics of the landforms shown. This lesson 2 HOUR lesson looks at how flood plains and levees are formed. Flood plains form when the discharge of the river channel exceeds it's capacity. The Outer bend of a river is where the … [1 mark… Referring to process of weathering and erosion in your answer. When a flood occurs, this material is resuspended in the water and added to the floodplain. Explain the formation of the cliff profile shown in 3A (6) Explain the influence of rock structure and lithology on the physical features shown in photograph 3B (6) Explain how the sediment cell concept … Read about our approach to external linking. Increased friction as the river breaks its banks reduces the river’s efficiency to transport material resulting in increased levels of deposition. It happens when excessive water is collected in any area. A floodplain is an area of low-lying ground adjacent to a river, formed mainly of river sediments and subject to flooding. Flood is one of the most dangerous natural disasters. Explain that engineers help people identify and prepare for flooding, including the design of dams, levees and dikes to protect people and property when flooding occurs. Home Economics: Food and Nutrition (CCEA). It usually happens due to heavy rainfall. The trees would reduce the amount of surface runoff so it would take longer for … 1 (b) Explain . 7 marks. Our tips from experts and exam survivors will help you through.