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Trang 1Policy Brief
Water Quality
Trang 2Cover photo: UNEP
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© UN-Water 2011
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1 Hydrologists typically assess water deficiency by looking at the population–water equation One index, first proposed by Falkenmark and Lindh (1976), defines water stress as occurring when annual water supplies drop below 1,700 cubic metres per person in a given area When annual water supplies drop below 1,000 cubic metres per person the population faces water scarcity, and below 500 cubic metres per person, absolute scarcity (25).
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2 Good Agricultural Practices are “practices that address environmental, economic and social sustainability for on-farm processes, and result in safe and quality food and non-food agricultural products” (32).
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