“Hurricane force winds batter the UK. “ (bbc, 12 feb)

Why is this not a hurricane though?

HW

Bring in a news paper article on the causes of the flooding in Somerset

Find out 10 impacts of flooding in Somerset (Figures and place names)

Due in on monday

Middle and lower course of the river

By the end of the lesson you will;

1)Be able to describe the key changes that occur as you move down the river from source to mouth

2)Be able to explain how a range of features have been formed in the middle and lower course of the river

3)Have applied your new knowledge on an exam question

Changes in the river;

Task

1.Describe the main changes that occur as you move from the source to the mouth of the river

2.Add in as many key words as possible

Key wordsGradient Velocity Width Deposition Erosion Transportation

Middle and lower course of the river

By the end of the lesson you will;

1)Be able to describe the key changes that occur as you move down the river from source to mouth

2)Be able to explain how a range of features have been formed in the middle and lower course of the river

3)Have applied your new knowledge on an exam question

Different features;

Task

You are going to have one feature in the middle and lower course

You need to make notes as to how this feature is formed

You should;

1)Explain how the feature is formed?

2)Describe the key erosional methods occurring

3)Add in a diagram

4)Explain how the feature will change in the future

Key features

MeanderOxbow lake Delta Levee

Oxbow lake;

Gradually over time, erosion will make the neck of the meander come closer and closer

On the bend of the river, the water will flow the fastest

An oxbow lake will happen on a meander in the middle course of a rive

This will lead to the formation of a river beach

On the inside of the bend, the water will flow the slowest

This will lead to the formation of a river cliff

During a period of high energy, the river will take the shortest route, which is straight across the neck of the bend

Over time, there will be deposition, which will fill in the bend. It will become completely detached from the river

Over time, the water will be evaporated away from the ox bow lake and it will be dry.

This will cut the bend off, and the river will now flow in a straight line

An Oxbow lake is found in the middle and Lower course of the river. It is a depositional feature

Use the information to explain how it has been formed

Lower course; Delta

Some of these methods include traction, saltation and suspension

The river will also reach the mouth where it meets the sea

Over time, these will develop into little islands which emerge out of the water

This leads to any material being deposited in the river channel

The river will loose the energy to transport the sediment

This will lead to material being deposited in the river channel

When the river reaches the lower course, the gradient is much smaller and the ground is almost flat

This will mean that the water is not moving

They will be held down by vegetation, which will prevent them from being eroded

A* Detail; An example of a delta is the Mekong Delta in Vietnam

Lower course; Levees

Upper / Middle/ Lower?

Match up the following key features to the section of the river which they occur in.

Upper Middle Lower

Lower course;

Study the following picture

Describe the changes in the landscape you can see

Pupils should be able to describe relief and landscape from a map using terms such as ridge, plateau, scarp, floodplain) and adjectives such as broad, flat, steep, deeply cut, gently sloping) -

Middle and lower course of the river

By the end of the lesson you will;

1)Be able to describe the key changes that occur as you move down the river from source to mouth

2)Be able to explain how a range of features have been formed in the middle and lower course of the river

3)Have applied your new knowledge on an exam question

What have you learnt?

1. Describe the processes leading to the formation of a waterfall (5 marks)

Criteria Achieved

Erosional processes included

Key features included (cap rock, plunge pool, Gorge)

Examples of different rock type are included

Spelling and grammar is effective (less than 3 mistakes)

Middle and lower course of the river

By the end of the lesson you will;

1)Be able to describe the key changes that occur as you move down the river from source to mouth

2)Be able to explain how a range of features have been formed in the middle and lower course of the river

3)Have applied your new knowledge on an exam question

What have you learnt?