CHARACTERISTICS AND FORMATIONS OF LANDFORMS RESULTING FROM EROSION AND DEPOSITION LANDFORM FORMATION MEANDERS Meanders are wide The current (flow of the water) bends of a river is faster on the outside of the found mainly in bend because the river channel is lowland areas. deeper and there is less friction to slow the river down. They constantly So more erosion takes place on change their shape the outside of the bend forming and position a river cliff. because of The current is slower on the LATERAL erosion inside bend because the river and deposition. channel is shallower and there is more friction to slow it down. The eroded material is deposited on the inside of the bend = slope. Riffle: areas of shallow, fast flowing water with coarse sediment. These form between meander bends because of a drop in velocity resulting in deposition. Pool: Deeper, slower moving water You need to learn the cross-section of a meander: OXBOW LAKE A shoe An oxbow lake once started life as a shaped lake meander. that marks where the Oxbow lakes start eroding the outside meander neck of the meander bend where there is the got cut off fastest flow. from the river channel. Outside bends become closer as the neck of the meander becomes narrower. The river breaks through this land during a flood and the river takes the fastest route. Deposition eventually cuts of the meander neck and leaves a horseshoe shaped oxbow lake.
CHARACTERISTICS AND FORMATIONS OF LANDFORMS RESULTING FROM EROSION AND DEPOSITION LANDFORM FORMATION MEANDERS Meanders are wide bends of a river found mainly in lowland areas. They constantly change their shape and position because of LATERAL erosion and deposition. The current (flow of the water) is faster on the outside of the bend because the river channel is deeper and there is less friction to slow the river down. So more erosion takes place on the outside of the bend forming a river cliff. The current is slower on the inside bend because the river channel is shallower and there is more friction to slow it down. The eroded material is deposited on the inside of the bend = slope. Riffle: areas of shallow, fast flowing water with coarse sediment. These form between meander bends because of a drop in velocity resulting in deposition. Pool: Deeper, slower moving water You need to learn the cross-section of a meander: OXBOW LAKE A shoe shaped lake that marks where the meander neck got cut off from the river channel. An oxbow lake once started life as a meander. Oxbow lakes start eroding the outside of the meander bend where there is the fastest flow. Outside bends become closer as the neck of the meander becomes narrower. The river breaks through this land during a flood and the river takes the fastest route. Deposition eventually cuts of the meander neck and leaves a horseshoe shaped oxbow lake.