As you progress towards the middle course abrasion causes the river to become deeper and the channel becomes wider also as you get to the middle course the gradient gets less steep. This lateral erosion results in undercutting of the river bankand the formation of a steep sided river cliff. The source at Tees Head, Cross Fell in the Pennines - marked by a boundary stone The lateral erosion means that the river gets wider. Interlocking spurs close to Cauldron Snout on the River Tees. An area of hard rock, called Whin Sill or Whinstone , is located above a layer of soft rocks sandstone and shale and together they create the waterfall. It's always worth a visit, and looks spectacular in flood conditions, though if severe the public pathway controlled by the National Trust is sometimes closed fo … r safety reasons. Tees Annotate this picture with how the are changes.
The River Bollin has its source in Macclesfield Forest. In recent years there have also been developments to increase its potential for recreation and tourism. The river is managed to provide a water supply and to control flooding. In its upper course the river is controlled by numerous dams and falls c. By the way the source elevation is 760km 2500 feet. Its source can be found in the moorland area of Cumbria, in the Pennine Hills which receives an average annual rainfall of 1200mm. Stage 1 In low flow conditions straight river channels have bars of sediment on their beds.
This landform is called an oxbow lake for the distinctive curved shape, named after part of a yoke for oxen. There are more settlements and transport links as the land is easier to build on. The river is approximately 1,500km long and drains into Lake Ontario at Port Credit. Meanders are perpetuated through a process called helicoidal flow. The upper course of a river is a very good place for a reservoir as the valleys are narrow and steep sided they make excellent locations.
Over time, a floodplain becomes wider and the depth of sediment accretions increases. Levees are high banks of silt along the banks of a river, seen here at Croft-on-Tees. Over time the oxbow lake becomes colonized by vegetation. Add on text boxes to show where these feeeatures are likely to occur along the map of the River Tees. Flood management strategies have been implemented: - flood warning systems - planning permission refusal in low-lying areas - monitoring of sea and river defences - building of the Tees barrage to reduce risk - dredging the river bed to increase channel capacity also improves navigation - new sewerage works and strict discharge legislation to improve water quality Research the Yarm Flood defence system and the Tees Barrage. Can you spot where this could occur? Once again we can see deposition on the inside curves of the meander.
The image below shows a point bar. It is a regulating reservoir, storing water in times of plenty and releasing enough for the needs of industry in times of low flow. It is usual for the coarsest heaviest material to be depoisted firest, froming small raised banks levees along the sides of the channel. Consequently, despite the more gentle gradient the velocity of flow may be as fast as in the uplands. A overrules the gradient factor. Underneath the Whinstone is softer limestone. This is because the land is flat and there is good fertile soil, so crops can easily grow.
Large factories and industrial areas also dominate the land use in the form of steel works, chemical plants, power stations, oil terminals and ship building yards. This town is called Yarn. Flowing water weavers around these bars of sediment. River Tees Essay Sample The River Tees is located in North East England. High Force was formed when the river eroded the limestone which is underneath harder rock whinstone which is harder to erode than limestone. The limestone erodes backwards, undercutting the Whinstone, which eventually collapses.
Employment opportunities are also restricted to mainly agriculture and forestry related jobs; as a result the population density in this part of the river valley is extremely low. As well as changes in the river channel, its surrounding valley has also become wider and flatter in cross-section with a more extensive floodplain. The mouth of the river is NorthSea. Where the river meets its final destination at the North Sea the land is extremely flat and has provided an ideal site for heavy industry, which developed during the Industrial Revolution. For this reason, the authorities sometimes strengthen levees and increase their height. Complete task 3 of photocopied sheet.
After a long period of time, the meander becomes very curved, and eventually the neck of the meander will touch the opposite side and the river will cut through the neck, cutting off the meander to form the oxbow lake. Again, the image below shows a series of meanders. Hydro Electric power: There are no power plants along the Tees. A meander is formed when the moving water in a stream erodes the outer banks and widens its valley. Therefore the river does not get any wider. When the water dries up, the feature left behind is knwon as a meander scar. Use the Geo Active to help you 6 marks.