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Vanessa Vaessen
Policy Adviser on Groundwater, Federal Institute for Geosciences and Natural Resources (BGR)
Federal Institute for Geosciencesand Natural Resources
German Federal Ministry for Economic Cooperation and Development
Managing the water buffer!
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Federal Institute for Geosciencesand Natural Resources
German Federal Ministry for Economic Cooperation and Development
Rainfall variation and GDP
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To ADAPT to climate change we need to manage the buffer
Photo: RAIN
Federal Institute for Geosciencesand Natural Resources
German Federal Ministry for Economic Cooperation and Development
Recharge: Managing natural and artificial recharge
Retention: Creating wet buffers in the basin
Re-use: Extending the ‘chain of uses’
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Conceptual diagram of a subsurface dam( Source: Vétérinaire sans frontier 2006)
3R = Recharge, Retention, Re-use
Federal Institute for Geosciencesand Natural Resources
German Federal Ministry for Economic Cooperation and Development
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6Source: Managed Aquifer Recharge (MAR) in semi-arid areas; Ian Gale and Peter Dillon, 2005
Federal Institute for Geosciencesand Natural Resources
German Federal Ministry for Economic Cooperation and Development
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3R Processes
Identifying local needsAssessment at scale:
3R potential mapping
Medium term climate information
Link to regional planning
Implementation and financing
3R: climate change adaptation + rain and floodwater harvesting + groundwater management
3R: dry and wet areas to adapt, sustain and improve water resources management for people, food and environment.
Federal Institute for Geosciencesand Natural Resources
German Federal Ministry for Economic Cooperation and Development
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Carefully create - in stages -a sandy aquifer behind the sand dam
Store floodwater and increase local water levels
Federal Institute for Geosciencesand Natural Resources
German Federal Ministry for Economic Cooperation and Development
Sand Storage Dams, Kitui, Kenya
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Diverting short floods to infiltration basins Niger, Iferouane
Federal Institute for Geosciencesand Natural Resources
German Federal Ministry for Economic Cooperation and Development
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Retaining water in a very humid area (North Bengal India)
Federal Institute for Geosciencesand Natural Resources
German Federal Ministry for Economic Cooperation and Development
Increasing cropping intensity and securing soil moisture
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Creating a water bank
Federal Institute for Geosciencesand Natural Resources
German Federal Ministry for Economic Cooperation and Development
Excess water from local dams injected in aquifer assures water availability for Windhoek city
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Key elements of 3R:
Proven techniques + not so well known techniquesWork at scaleLocation-specific (urban + rural, dry + wet) Start from local prioritiesIntegrate with regional planning, land use planning etcNo-regret measures
Federal Institute for Geosciencesand Natural Resources
German Federal Ministry for Economic Cooperation and Development
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Sometimes you are standing on a solution without even knowing it.
Federal Institute for Geosciencesand Natural Resources
German Federal Ministry for Economic Cooperation and Development
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Thank you for your attentionVanessa Vaessen
Policy Advice Groundwater –Resources and Management Federal Institute for Geosciences and Natural Resources (BGR)
Federal Institute for Geosciencesand Natural Resources
German Federal Ministry for Economic Cooperation and Development
www.bebuffered.com
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3R in arid and humid areas
3R for water and food security
3R for urban and rural development
Federal Institute for Geosciencesand Natural Resources
German Federal Ministry for Economic Cooperation and Development
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Federal Institute for Geosciencesand Natural Resources
German Federal Ministry for Economic Cooperation and Development
open well, adjacent to check weir in Vanvasi, India
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Using Road Infrastructure for 3R
Road embankments retain surface runoff
Federal Institute for Geosciencesand Natural Resources
German Federal Ministry for Economic Cooperation and Development