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Published byAugustus Watts Modified over 9 years ago
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Water Supply and Demand Bangkok 2013
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Water Supply Country Water supply (billion m3/yr) Groundwater supply Bangladesh120621.12 Cambodia471.517.6 Indonesia1973457.4 Lao PDR333.537.9 Maldives0.00000.0300 Mongolia32.76.1 Nepal210.220 Philippines444180 Sri Lanka527.8 Thailand427.441.9 Viet Nam847.771.42
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Measuring Supply Water is expensive to move from watershed to watershed – Heavy so costly to move – Low valued (except for drinking water) Correct measure of supply is at watershed level- not country level Monthly pattern also matters – Expensive to store across months – Requires a dam
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Measuring Water Supply Care about fresh water (not saltwater) Care about supply relative to land and people Not every country the same – Some have abundant water – Some have very little – Some have scarce water/land but abundant water/person
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Water Supply Country Water supply/land (m3/ha) Water supply/capita Bangladesh852088153 Cambodia2629833282 Indonesia106018332 Lao PDR140848332 Maldives100094 Mongolia22212429 Nepal142826895 Philippines159675050 Sri Lanka80482509 Thailand85486309 Viet Nam267139957
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Measuring Demand Four primary users – Agriculture- largest user – Industry- second largest – Residential- highest valued
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Water Demand Country % Agriculture% Industrial% Residential Bangladesh 87.82.110 Cambodia 941.54.5 Indonesia 81.96.511.6 Lao PDR 91.44.93.7 Maldives 05.194.9 Mongolia 43.943.212.9 Nepal 98.10.31.5 Philippines 82.2107.6 Sri Lanka 87.36.46.2 Thailand 90.44.93.7 Viet Nam 94.83.71.5
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Water Allocation Suppose two users: farmers and U&I U&I more price inelastic than farmer Suppose that farmers have more water than efficient amount What is loss?
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Supply Price Water for farmers Water for Urban/Industry Initial Allocation Inefficiency Farmer U & I
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Climate Change Suppose that climate change reduces water supply Suppose farmer water is protected Water must come from U&I Efficiency loss grows
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Supply Price Water for farmers Water for Urban/Industry Farmer U&I
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Climate Change Suppose that climate change reduces water supply Suppose water is reallocated from farmers to U&I Efficiency losses shrink Water management objective- equate marginal value of water across users
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Supply Price Water for farmers Water for Urban/Industry Farmer U&I
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