lesson 11 changes in hydrological cycle
TRANSCRIPT
8 December, 2014
How do changes in how water moves through the hydrological
cycle affect the risk of flooding?
Starter: Without looking back at your notes, write down as many parts
of the Hydrological Cycle as possible.
Those who missed last week – grab a revision sheet from me.
Pass Remember the key terms of the hydrological cycle and use them to explain flood risk.
Higher Able to suggest reasons why the River Adur floods and apply your knowledge to an unknown river with a basic answer.
Star Able to apply your knowledge of the hydrological cycle to an unknown river with a developedanswer.
• Precipitation
• Groundwater Flow
• Groundwater
• Soil Moisture
• Evaporation
• River Flow
• Surface Runoff
• Interception
• Transpiration
• Infiltration
• Throughflow
• Percolation
Hydrological cycle Pictionary
• Teams of 3.
• One person comes to me for a term.
• Return to team and draw.
Keywords check
• What is………….
1. Percolation?2. Groundwater flow?3. Throughflow?4. Surface run-off?5. Transpiration?6. Evaporation?7. Condensation?8. Infiltration?9. Channel flow?10. Saturated?
• Answers:
1. Water soaking into bedrock2. Water flowing through bedrock 3. Water flowing through soils4. Water flowing over soil (doesn’t soak in)5. Water ‘breathed out’ by plants6. Water liquid turning into vapour7. Water cooling and returning to liquid8. Water soaking in to soils9. Water flowing in a river/stream10. When soil/rock is full of water and no more
can infiltrate
Big Picture
How water flows around a river system and affects flooding.
The main features of a drainage basin.
A case study of flooding.
A case study of how a river is managed.
Other than extreme flooding, suggest one reason why the River
Adur floods. (3)
Use the hydrological cycle to list as many reasons as possible
(there are 5)
River Adur is a main case study – features,
flooding, management.
What factors affect the flow of water through the hydrological cycle?
How to write an extended answer.
so thatmeans
that
How
hydrological
cycle is
affected
FactorResult on
flooding
so thatmeans
that
Land-use
Weather
Ge
olo
gyR
elie
f
What factors affect the flow of water through the hydrological cycle?
so thatmeans thatHow hydrological cycle
is affectedFactor Result on flooding
On your sheet:
1. Select a Pass or Higher list of factors
2. Sort each factor into the correct part of
the diagram.
3. Create a ‘means that’ ‘so that’
explanation.
Other than extreme flooding, suggest one reason why the River
Adur floods. (3)
Use the hydrological cycle to list as many reasons as possible
(there are 5)
River Adur is a main case study – features,
flooding, management.
Exam question
Interception Infiltration Surface Runoff
Ground water flow Percolation Transpiration
Pass Higher
Trees are cut down Deforestation
Rock that does not let
water soak in
Impermeable rock such
as granite
Rock that lets water soak
in to it
Permeable rock such as
limestone
Hills are steep Frozen ground
Hills are not very steep Saturated ground
Lots of towns and cities Steep ground
Farmland Urban land use
Soil that lets water soak
in to it, such as sandy
loam
Impermeable soil such
as clay
Soil that doesn’t let water
soak in to it, such as clay
Permeable soil such as
sandy loam
Frozen ground Shallow relief