POLIS Water Sustainability Project - From Science to … › files › 2017 › 06 › Brian... ·...
Transcript of POLIS Water Sustainability Project - From Science to … › files › 2017 › 06 › Brian... ·...
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Brian Richter
Chief Scientist, Global Water Program, The Nature Conservancy
President, Sustainable Waters
© Insert Image Credit
From Science to Implementation:
World-Class Approaches for Protecting
Environmental Flows
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Key Factors Affecting Freshwater Ecosystems
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Flow Regime
(low flows, high pulses, floods)
Physical
Habitat
Water
Quality
Energy
Supply
Species
Interactions
Ecological Health
Ecosystem Services
Connectivity
Flow regime is the “master variable”
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Environmental Flows
The quantity, timing, and
quality of water flows
required to sustain
freshwater and estuarine
ecosystems and the
human livelihoods and
well-being that depend on
these ecosystems.
(from the Brisbane Declaration)
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How do we best ensure that we
sustain ecosystem health while
meeting other needs for water?
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The concept of “sustainability boundaries”
From “Rivers for Life: Managing Water for People and Nature”
by Sandra Postel and Brian Richter, Island Press, 2003
H = human use E = ecosystem support
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South Africa National Water Act (1998)
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Texas Senate Bill 3 (2007)
• Determine how much water is needed (and when it is
needed) to keep the state’s rivers and coastal
estuaries healthy,
• Determine how much of that needed water, if
available, should be protected as new water rights are
issued, and,
• If water needed for healthy rivers and estuaries is not
currently available, how do we go about making it
available so we can pass a healthy natural heritage
along to future generations of Texans?
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The concept of “sustainability boundaries”
From “Rivers for Life: Managing Water for People and Nature”
by Sandra Postel and Brian Richter, Island Press, 2003
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Murray-Darling Basin Plan (2012)
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Murray-Darling Basin Plan (2012)
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Sustainability Boundary Approach
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Sustainability Boundary Approach
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A “Presumptive Standard”
Re-thinking environmental flows: from allocations and reserves to sustainability boundaries
Richter, B.D. 2009. Rivers Research and Applications
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Available from
Island Press
or most booksellers
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