• Save
L11 Uk Water Supply And Demand
Upcoming SlideShare
Loading in...5

L11 Uk Water Supply And Demand






Total Views
Slideshare-icon Views on SlideShare
Embed Views



3 Embeds 92

http://tudorgeog-gcse-aqa-a.blogspot.co.uk 36
http://www.slideshare.net 29
http://tudorgeog-gcse-aqa-a.blogspot.com 27



Upload Details

Uploaded via as Microsoft PowerPoint

Usage Rights

© All Rights Reserved

Report content

Flagged as inappropriate Flag as inappropriate
Flag as inappropriate

Select your reason for flagging this presentation as inappropriate.

  • Full Name Full Name Comment goes here.
    Are you sure you want to
    Your message goes here
Post Comment
Edit your comment

    L11 Uk Water Supply And Demand L11 Uk Water Supply And Demand Presentation Transcript

    • UK water management Key idea: Rivers are managed to provide a water supply. There are a variety of issues resulting from this. Need blank UK map
    • Objectives:
      • To explain why there is an increasing demand for water in the UK.
      • Know and be able to map areas of deficit and areas of surplus.
      • To explain the need for transfer and give one example.
      • To know details of Kielder Water as a case study of a dam/reservoir
      • Be able to explain the resulting economic, social and environmental issues
      • To be able to explain why there is the need for sustainable supplies.
      • 2000Q3 OLD AQA SPEC B
      • (i) Using only evidence from Fig 4, describe the distribution of the reservoirs shown (2)
      • (ii) Name a reservoir on Fig 4 that is in the Lake District (1)
      • (iii) In the 1990s there were water shortages in parts of the UK. Give three reasons that help to explain this (3)
      • b. In some parts of the UK groundwater supplies are more important than surface reservoirs. Explain why (5)
    • Water storage – key terms
      • Porous – rock with spaces between the particles which make up the rock
      • Permeable – rock which allows water to pass through the pore spaces
      • Pervious – rock which allows water to pass through via cracks
      • Impermeable – rock which does not allow water to pass through
      • Groundwater - water stored underground in areas of permeable rock
      • Water Stress – see page 121
      • Areas of deficit - see page 121
      • Areas of surplus - see page 121
      • ¾ of UK’s water supply comes from mountain lakes, upland reservoirs and rivers
      • 25% comes from underground stores
    • Ref pg 120 / 121 AQA A Demand for water is increasing for the following reasons:
      • UK’s population now exceeds 60 million
      • Water consumption per head is high
      • Increased domestic use – dishwashers, washing machines, garden hoses etc
      • Increased use in farming – with hotter and drier summers arable farmers are using irrigation for crops
      • Increased electricity demand and therefore generation – thermal and nuclear both use water for cooling
    • Rainfall map of t Rainfall map of the United Kingdom   Fig 1. - Annual precipitation over Great Britain he United Kingdom   Fig 1. - Annual precipitation over Great Britain Heaviest rainfall Areas with most cloud cover Lowest summer temperatures – less loss of water due to evaporation or transpiration Areas with low population density WATER SURPLUS WATER DEFICIT Demand > Supply Rainfall is lower Evaporation and transpiration is high 1/3 UK population lives in SE IN THE WEST IN THE EAST
    • homework
      • It is clear that the demand for water is increasing. What can be done to increase supplies? Go to www.bbc.co.uk/news
      • Research how we and water companies can be more water efficient
    • how can supply/demand be managed?
      • Water companies are reducing leaks , each day, millions of litres are lost through leaking pipes
      • Build more reservoirs
      • As consumers we are being encouraged to be more efficient in our use of water
      • Demand can be satisfied by water transfers
      • Community tanks at end of streets with electric swipe cards so that only those people on the street have access to that supply
      • recycling
      • How are we encouraged to be more efficient in our use of water?
      • Transferring water by pipeline is costly
      • Some aqueducts were build many years ago.
    • How are we encouraged to be more efficient in our use of water? *rainwater can be collected *bathwater can be recycled to flush toilets *showers use less water than taking a bath – heads that limit water * Houses are being designed with better water efficiency * Devices are fitted to toilet cisterns to reduce water use *water meter – charge people for the exact volume of water that they use households with a water meter use less water - on average, 19 litres per person per day less *hose pipe bans * Education – TV ads
      • A traditional solution to unequal supply of water has been to transfer water from areas of surplus to areas of deficit.
      • Transfers by river are easier and cheaper but they raise environmental concerns
      • Proposed Severn – Thames transfer has highlighted several problems:
      • Severn river water has different mineral, nutrient, acidity and temperature characteristics of Thames water – what will be the impact of the transfer on insect fish and plant life be on the Thames
      • The cost of building dams, tunnels etc would be hundreds of millions of ££££
      • Land will be lost, habitats destroyed and migratory habitats disturbed
      • There is no gain to the Welsh people and their local economy.
    • Water has to be managed sustainably
      • The supply of water from the reservoir has to be sustainable
      • People should be able to get all the water they need today without stopping people in the future from having enough water
      • People can’t deplete the water supply or damage the environment too much or the supply won’t be the same in the future.
      • People should only take out as much water as is replaced by the rivers that supply it.
    • Where does Birmingham get its water from?
      • http://www.bbc.co.uk/wales/mid/sites/history/pages/facts.shtml
      • Other case studies
      • Rutland Water – East Midlands (CGP pg 52)
      • Kielder Water Understanding Geography Bowen and Pallister pg 95
      • Vyrnwy – Liverpool AQA A pg 122
    • Plenary….
      • Which areas of the UK have a water deficit
      • Give one potential problem of water transfer
      • Name a reservoir in the UK
      • What is meant by a sustainable water supply?