18 terms

River Severn- river landforms


Terms in this set (...)

River Severn
-river landforms
United Kingdom
How long is the river?
354km- longest river in the UK
What is the path of the river?
Source is in the Cambrian Mountains of mid Wales. It then flows through Shropshire, Worcestershire and Glocester on its banks.
What is the alltitude at the mouth?
610 meters
What is the average discharge at Apperley and Glocestershire?
Upper course
V-shaped valley formation
The shallow narrow streams in the upper course cut into the soil overtime undercutting the banks. Eventually, the side of the river bank are weakened by weatherind and continued vertical erosion, causing mass movement of material and forming the v-shaped valley.
Interlocking Spurs
The streams are forced to swing round outcrops of resistant rock, forming interlocking spurs.
Waterfall name
Severn Break-its-Neck
Second largest waterfall fonudn along the river Severn. Found within the first few miles from the source of the river.
What is the main erosion in the upper course?
Middle Course
Many meanders around Caersws, found halfway between Aberystwyth aned Shrewsbury, becuase the river is now flowing across low land. The Severn begins to wander from side to side across the valley floor.
Ox-bow lake
Over long periods of time the shape of these meanders will change, due to erosion and deposition, and potentially form an ox-bow lake.
What is the main erosion in the middle course?
Lower course
Flood Plain
The River Severn is notorious for rising quickly. Being a long river there are many tributaries feeding in, helping to increase the amount of water in the River Severn. The low land in the middle and lower couse are excellent floodplains for this water, which have become very fertile with the build up of layers of nutrient rich sediment. However, over the years, massive flood defence schemes have been used to stop the water rising up over the banks.
The Severn Estuary is the tidal part of the river where it meets the British Channel. It is at the mouth of three major UK rivers- the Severn, Wye and Avon. The rivers carry a lot of sediment as they travel from the source to the mouth. Much of this sediment id dropped at the mouth where the rivers flow more slowly. The Severn Bore is a large surge wave that can be seen in the estuary of the River Severn, where the tidal range is the 2nd highest in the world, being as much as 50 feet. Its high tidal range means it has been at the centre of discussions in UK regarding renewable energy.