Water for the World. Quick Quiz… What percentage of the world’s water can we drink? A. 0.8% B. 6% C. 19% D. 30%

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Presentation transcript:

Water for the World

Quick Quiz…

What percentage of the world’s water can we drink? A. 0.8% B. 6% C. 19% D. 30%

A. 0.8% 0.8 % fresh water 1.7 % ice, glaciers 97.5 % sea water Ludovik Hirlimann Andrew Hux

How many people in the world are without access to drinking water? A. 1.1 million B. 210 million C. 1.1 billion D. 2.3 billion

C.1.1 billion

On average how many litres of water do we use a day? A. 50 B. 100 C. 150 D. 200

C. 150 litres UK Average 150 litres = 10 litres

UK Average 150 litres Mozambique 8 litres America 350 litres

How many litres could be lost through leaks in this country per day if the supply is 4.5 billion litres? A. 2 million B. 50 million C. 500 million D. 900 million

Dwellings (55%) Non dwellings (25%) Lost in transmission (20%) Canary Wharf

What percentage of domestic water is used for flushing toilets in the UK? A. 10% B. 20% C. 25% D. 30%

Water Consumption Hoekstra, A.Y. and Chapagain, A.K. (2008) Globalization of water: Sharing the planet's freshwater resources, Blackwell Publishing, Oxford, UK

Availability of Water World Resources Institute - PAGE, 2000

Water Scarcity International Water Management Institute

Virtual Water Water used to produce products Water footprint = Domestic + Virtual Water Import Virtual Water Export - Hoekstra, A.Y. and Chapagain, A.K. (2008) Globalization of water: Sharing the planet's freshwater resources, Blackwell Publishing, Oxford, UK

Decontamination and Water Service Infrastructure

Water Services Infrastructure

Water Service Infrastructure

Water Treatment Plant Arup

Water Treatment Plant Filter River “source” Add chemicalsStir Settle Disinfect Store Distributee

Alternative Water Sources Groundwater (Well with Pump) WaterAId

Alternative Water Sources Springs Caroline Penn, WaterAId

Alternative Water Sources Surface Water – Lakes and Rivers Courtesy of Indrajit Shah

Alternative Water Sources Rainwater Harvesting Anokhee Shah,

Alternative Water Sources Water Delivery Anokhee Shah,

Alternative Water Sources Sea – Thermal Desalination or Reverse Osmosis Arup

Treatment – Appropriate Technology Potters for Peace – Ceramic Water Filters Slow sand filtration – Biosand Filter Potters for Peace

Treatment – Appropriate Technology SODIS – Solar Disinfection SODIS / Eawag

Conclusions Arup