Water on the Land revision – causes of flooding

• Why do some areas flood more easily than others?

• List as many reasons as you can• For each, write P for physical or H for human

next to it

• Which ones did you get?

• Which ones did you not get

• Any you got that are NOT on this drawing?

For at least 3 human and 3 physical reasons use “This means that” to explain why it makes a river flood (top tip: how does it mean water gets to the river more quickly?)

Hydrographs (means water graph)

Read through Use p.47 of the revision guide to help you with key words for this graphFoundation candidates: Look at the sheet with p. 42 River Discharge at the top.Higher Candidates: Do exam question from higher paper 2011 on hydrographs.

Challenge: List the reasons why there are such frequent floods in Bangladesh

• The longer the lag time the longer it takes for the water to get into the river therefore less likely to flood

• The lag time is between the peak rainfall (most amount of rain) and the peak discharge (when the river is holding the most amount of water)

Meanders and Ox Bow Lakes (2 videos here)

These useful simple animations help illustrate it as well

You have 5 minutes to read through the old old old GCSE book Key Geography for GCSE p. 8-9. It is still the best written explanation around and then you will be answering a 4 mark question on it

2011 question 2011 Draw a labelled cross-section to show how the inside bend of a meander is different from the outside bend of a meander. (4 marks)

Mark SchemeCross-section should show asymmetrical profile and label the inside bend and the outside bend. The following characteristics are likely to be noted – gentle slip off slope on the inside bend, where the water is shallow. There is deeper water on the outside bend. A steep slope in the form of a river cliff, which is often undercut by the river is found here.NB There is no credit for processes here.Level 1 Basic (1-2 marks)• Simple diagram – may be a sketch or plan.• Simple labels.• Some confusion between inside and outside bend.Level 2 Clear (3-4 marks)• Clear cross section that shows asymmetrical shape.• Cross section has clear labels.• Contrast between inside and outside bend is clear.

Water on the land case studies

Name them

Water on the Land

1. River flood in a LEDC – Bangladesh Ganges and Brahmaputra

2. River flood in a MEDC – River Severn3. UK Reservoir or Dam – Rutland Water

CASE STUDY: Bangladesh Flood in a

poorer part of the world

Short term Effects of the flood

Responses to long term

effects

Long term effects of the

flood

PSI: Where?

WATER ON THE LAND

Responses to short term

effects

1) Compare to flood in richer part of the world2) Do environmental, social and economic for each box

CASE STUDY: River Severn

Flood in a richer part of the

world

Short term Effects of the flood

Responses to long term

effects

Long term effects of the

flood

PSI: Where?

WATER ON THE LAND

Responses to short term

effects

1) Compare to flood in poorer part of the world2) Do environmental, social and economic for each box

CASE STUDY: Rutland Water –

example of a dam/reservoir

Economic effects of

the reservoir

The need for sustainability

in all this

Social effects of the

reservoir

PSI: Where?

WATER ON THE LAND

Environmental effects of the

reservoir

Water Supply in the UK (leading on to Rutland case study)

This 6 mark question from 2015:• Explain how Figures 14a and 14b show that

there are likely to be areas of water surplus and areas of water deficit in England and Wales. (see page 14 in the higher insert)

So we have a water supply in the UK

List ways the country can lessen this problem:

Split your list into‘managing the supply’ and‘reducing demand’

2013 higher paper

5 (c) (ii) Discuss issues which result from building dams and reservoirs (8marks)