MYTUTOR SUBJECT ANSWERS

63 views

Explain the formation of a meander.

Explaining the formation of a meander is a common question at both GCSE and A-Level. The answer given below is for an A-Level response.

Answering this question may also involve drawing a small annotated sketch of a meander as well as a substantial paragraph of explanation.

The formation of a meander can often be explained in a series of key steps (remember that geographical terms are very important here):

1. Due to banks of sediment at the bottom of the river (which are deposited at times of low flow, that is, a low velocity and low discharge, meaning deposition increases), the river weaves around these alternating shallow and deeper sections (riffles and pools) on what was an initially straight channel.

2. This movement targets one bank of the section after the riffle, subsequently leading to erosion (carried out by hydraulic action and abrasion) – this becomes the outside bend of the meander.

3. This leads to the formation of a river cliff on the outside bend. The material eroded further upstream is deposited on the opposite bank (inside bend) on the slip off slope. This is due to a corkscrew movement in the river (helicoidal flow) which results in water levels on the outside of a meander bend to be elevated, giving a faster velocity (the Thalweg line is located here). The deposition on the inside bend gives an asymmetrical cross section of the channel. The Thalweg line is the line of maximum water velocity down the path of the river.

4. Erosion and deposition continues which leads to the meanders becoming more curved. This eventually results in ‘meander migration’ – i.e. these processes shift downstream and are not static in one particular location. 

Robert W. A Level Geography tutor, GCSE Geography tutor, A Level Exte...

2 months ago

Answered by Robert, an A Level Geography tutor with MyTutor

Still stuck? Get one-to-one help from a personally interviewed subject specialist

35 SUBJECT SPECIALISTS

£20 /hr

Graham R.

Degree: Geophysics with Geology (Bachelors) - Durham University

Subjects offered: Geography, Physics+ 1 more

Geography
Physics
Maths

“About Me I am a 3rd year Geophysics and Geology student at Durham University. Ever since I was small Maths seemed to click with me and I always found it easy to explain. These skills came in use when I was asked to be an academic ment...”

£20 /hr

Polly G.

Degree: BSc Geography (Bachelors) - Bristol University

Subjects offered: Geography, Economics+ 2 more

Geography
Economics
Biology
Art

“About Me: I am currently studying Geography at The University of Bristol, I grew up in London and attended Latymer Upper School. I chose Geography because of my interest in cultures, societies and communities around the world, my A Le...”

MyTutor guarantee

£20 /hr

Theone J.

Degree: BA Geography (Bachelors) - Southampton University

Subjects offered: Geography, Psychology+ 1 more

Geography
Psychology
Economics

“About me-  I am an undergraduate student at the university of Southampton currently studying BA Geography. It has been one of favourite subjects since high school not just because we get to colour in maps all day. My passion for the s...”

MyTutor guarantee

About the author

£20 /hr

Robert W.

Degree: Geography (Bachelors) - Exeter University

Subjects offered: Geography, Extended Project Qualification

Geography
Extended Project Qualification

“About me: I am currently studying Geography at Exeter University. I offer tutoring in Geography (for GCSE and A-Level) and the Extended Project Qualification (EPQ), both of which I gained an A* at A-Level. I have been enthusiastic abo...”

MyTutor guarantee

You may also like...

Posts by Robert

Explain the formation of a meander.

Use one or more examples to explain why people migrate within the European Union.

What is the difference between qualitative and quantitative data?

What makes an outstanding EPQ presentation?

Other A Level Geography questions

Q: Describe one atmospheric system and the effects it can have on the area.

Explain the formation of a meander.

What is the difference between qualitative and quantitative data?

Explain how the planting on new forests could assist with adapting to climate change (2 marks) and climate change mitigation (2 marks)

View A Level Geography tutors

Cookies:

We use cookies to improve our service. By continuing to use this website, we'll assume that you're OK with this. Dismiss

mtw:mercury1:status:ok