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What is a slip-off slope in geography?
Definition of slip-off slope : a comparatively gentle slope often produced on the downstream face of a meander spur.
What creates a slip-off slope?
The lateral erosion on the outside bend causes undercutting of the bank to form a river cliff . Water on the inner bend is slower, causing the water to slow down and deposit the eroded material, creating a gentle slope. The build-up of deposited sediment is known as a slip-off slope (or sometimes river beach).
How are slip-off slope formed GCSE?
The force of the water erodes and undercuts the river bank on the outside of the bend where water flow has most energy due to decreased friction. This will form a river cliff. On the inside of the bend, where the river flow is slower, material is deposited, as there is more friction. This will form a slip-off slope .
Where are slip off slopes found?
A slip-off slope is a depositional landform that occurs on the inside convex bank of a meandering river. The term can refer to two different features: one in a freely meandering river with a floodplain and the other in an entrenched river.
What is the difference between a point bar and a slip-off slope?
A point bar is a depositional feature made of alluvium that accumulates on the inside bend of streams and rivers below the slip-off slope. Point bars are found in abundance in mature or meandering streams.
What is the name of the feature where a meander has been cut off from the river channel?
oxbow lake
As the river breaks through, eg during a flood when the river has a higher discharge and more energy, and the ends join, the loop is cut-off from the main channel. The cut-off loop is called an oxbow lake.
How are rapids formed BBC Bitesize?
As the river erodes the landscape in the upper course, it winds and bends to avoid areas of hard rock. This creates interlocking spurs, which look a bit like the interlocking parts of a zip. When a river runs over alternating layers of hard and soft rock, rapids and waterfalls may form.
Where is the most bedload in a river?
In the upper course of the river bedload is larger and more angular. As we track the river downstream bedload becomes much smaller and smoother. In the lower course bedload can only really be found in the form of fine sediments and muds, known as alluvium.
Why is the river Tees important?
Transport and settlement – the Tees has been an important route way for centuries, and towns such as Yarm owe their existence to trading on the river. Water supply – Cow Green reservoir supplies the city of Middlesbrough. Farming – Sheep farming in the upper course. Tourism – The Pennine Way, High Force waterfall etc.
How a water fall is formed?
Waterfalls often form in the upper stages of a river where it flows over different bands of rock. It erodes soft rock more quickly than hard rock and this may lead to the creation of a waterfall.
How do potholes form in rivers?
They are formed when sediment and other material carried by a river scour the bed. Where depressions exist in the channel floor turbulent flow can cause pebbles to spin around and erode hollows through abrasion/corraision.
What does cut off mean in geography?
geography. a channel cutting across the neck of a meander, which leaves an oxbow lake.
How are cut off meanders formed?
A meander cutoff is a natural form of a cutting or cut in a river occurs when a pronounced meander (hook) in a river is breached by a flow that connects the two closest parts of the hook to form a new channel, a full loop.
How are rapids formed?
How are Rapids formed? Rapids are stretches of fast-flowing water tumbling over a rocky-shallow riverbed. They are caused by different resistance among various rocks, that leads to sudden drops and rises in the river bed. That in turn causes instabilities in the flow of a rivers currents.
Why is more sediment deposited at slip off slopes than river Cliffs?
Water flowing around a meander moves fastest on the outside of the bend leading to erosion and the formation of a steep river cliff. On the inside of the bend, water slows down leading to the deposition of sediment. This forms a gently-sloping slip off slope in the shallow water.
Why do Rapids form?
Why did the River Tees flood?
The floods were caused by a sudden thaw of the ice in upper Teesdale, and a cloud burst over the Pennines. The rain began in the early hours of Saturday morning and continued heavily throughout the day and night without a break.
When did the River Tees flood?
On the night of 16/17th November 1771 the North East of England suffered some of the worst and most destructive flooding on record. The river Tees burst its banks in a number of places with Yarm being one of the areas worst affected.
How is a slip-off slope formed?
This type of slip-off slope is formed by the contemporaneous migration of a meander as a river cuts downward into bedrock. A terrace on the slip-off slope of a meander spur, known as slip-off slope terrace, can be formed by a brief halt during the irregular incision by an actively meandering river.
What type of landform is a slip off slope?
Slip-off slope (right) and cut bank. The depositional slip-off slope is on the left and a small river cliff on the right. River Ashes Hollow, UK. A slip-off slope is a depositional landform that occurs on the inside convex bank of a meandering river.
Why does a meander have a slip off slope?
There is less water on the inside bend of a meander so friction causes the water to slow down, lose energy and deposit the material the river is carrying, creating a gentle slope. The build-up of deposited sediment is known as a slip-off slope (small scale landform) or sometimes river beach.
What is the slip off slope of an entrenched river?
Entrenched Rivers. The slip-off slope of an entrenched meander is a gently sloping bedrock surface that rises from the inside, concave bank of an asymmetrically entrenched river. A thin, discontinuous layer of alluvium often covers this gently sloping bedrock surface. This type of slip-off slope is formed by the contemporaneous migration…