1. Surpluses in the hydrological cycle

2. Today we are learning this content:
5.5 (a and b and c)

3. Surface water flooding
Complete the key terms
Flooding the occurs when intense rainfall has insufficient time to infiltrate the soil, so flows overland
Flooding that occurs after the ground has become saturated from prolonged heavy rainfall
A flood with an exceptionally short lag time - often minutes or hours
A type of glacial outburst flood that occurs when the dam containing a glacial lake fails.
Groundwater flooding
Flash flooding
Jokulhlaup
Surface water flooding
Prepare for learning

5. A number of environments are more at risk
Low-lying parts of flood plains and river estuaries
Urbanised areas
Small basins
For each of these environments explain why they may be more at risk of flooding – use Hodder p30

6. What causes flooding? Physical factors!
What meteorological factors cause flooding?
Physical factors!
Present new information
Page 31 and top of p32
Hodder. Use the fig 2.12
too

7. Examiners key points
Its crucial to have case studies for each one

8. Flooding - examples Monsoon rain – Pakistan
Present new information
Monsoon rain – Pakistan
Recap on how monsoons happen:
The Effects:
For each of these examples, you need to read through the geo factsheet and highlight the key points. You need to formulate notes in your book which helps you to explain why the floods occurred in these places. Be sure where applicable that you make sense of the synoptic chart that is shown.
Prolonged rainfall - The UK
Print off case study sheets.
Snow melt- Bangladesh
Flash Floods:
french-flash-floods-wreak-havoc-in-southern-city-of-
montpellier
Snow Melt:

9. Today we are learning this content:
5.5 (a and b and c)

10. Human causes of flooding
Urbanisation
River management
Climate change
Human causes of flooding
Deforestation
Use page 33 of Hodder plus computer research
Change of land use

11. Flood risk in Ashford, Kent
Highlight the sheet in your LL booklet with physical and human causes of flooding.

12. The impact of flooding in UK Winter 2015-2016
Read the Geo Factsheet 353
Highlight and annotate the following
Causes – Hydrological and human – specific named examples
Impacts – Social, economic and environmental – long and short term (again a range of named examples are needed

13. How can we understand flood risk?
Flood frequency
The size of the largest flood event for each year for a particular location is placed in rank order, with Rank 1 being the largest for all available records for any given location.
The following calculation is applied to calculate the time interval between floods of a similar size.
 T = n+1 M
 Where
T = recurrence interval
N = number of years of observation
M = rank order
The calculated recurrence level indicates the number of years within which a flood of this size might be expected.
Limitations: based on historic data which means similar floods may occur more/less frequently. Climate change would lead us to think events will be more frequent.
The floods of highest magnitude will have much longer return periods – While they have the highest impact they may be less likely to occur.
Flood return
Also known as the flood recurrence interval
Estimate of the likelihood of a flood of a certain size recurring.
A flood likely to happen once in ten years has a 10% chance of happening in any one year
However….
This cannot be used as a forecast as a flood may happen more than once in the same time interval or may not occur at all.

14. Complete all the LL sheets for 5.5

15. Extra Exam Question
Construct new meaning
Using examples, discuss the impact of flooding on people and the environment (12 marks)
Level 1: 1-4 marks
Level 2: 5-8 marks
Level 3: 9-12 marks
Print off case study sheets.