towards sustainable watershed management...shift from primarily forest cover to mixed use; ~45%...
TRANSCRIPT
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Towards Sustainable Watershed Management
From Raindrops To Rivers: Watersheds At Work
Shift from primarily forest cover to mixed use; ~45% agriculture
• >5x increase in peak flows– Increase in flood risk
– Increase sediment loss
– Loss of base flow
– Lower useable flow
– Reduction in reservoir reliability
– Degradation of water quality
– Disruption of groundwater recharge
– etc., etc., etc….
Impacts Of Land-use Change On Watershed Functions
Development
Plans/Markets
Livelihoods
Land UseWater
Demand
Watershed
Condition
IWRM
Responses/
Investments
Common Water Resources Management Sequence
IWRM
Basin Plans/
Investments
Land Use
Management
Sustainable
Water
Demand
Development
Plans/Markets
& Livelihoods
Watershed
Condition
Assessment
Alternative Water Resource Management Sequence
INTER-AMERICAN
DEVELOPMENT BANKWater and Sanitation Division
Access and Quality
Financing
GovernanceOperational Management and PPP
Social and Environmental
Gender
Ethnic
minorities
Multisectoral
Comprehensive
Reducing
inequalities
Increasing
wastewater
coverage
Supporting
Self-
sustainabilit
y
W&S as a
priority
sector in the
countries
HRW
Creating
autonomous
utilities
Promoting
water
security
Sector Framework
INITIATIVES
Water-Energy-Food Nexus
Food security
Energy securityWater supply
for urban
environments
Environmental
Security Resource
Efficiency Use
Integrated Planning and
Infrastructure
• A financial mechanism for
watershed conservation
• A governance mechanism
for watershed planning
• An implementation
mechanism for
conservation activities
Regional Policy Dialogue
Knowledge and dissemination
Communications
Key WRM Challenges Desired Outcomes Emerging Management Instruments
Reduce watershed degradation• Conservation needs• Restoration priorities
Reduce flooding Restore baseflow Promote aquifer recharge Minimize sedimentation Halt deforestation Maintain reservoir reliability
Healthy Watershed assessment protocol(s)
“Hot spot” identification Ecosystems services valuation Value chain mapping Regional Vulnerability Assessment
(ReVA) methods/Compact Growth
Improve water allocation Balance supply-demand Avoid conflicts Maximize economic benefits
“High Definition” watershed models Conjunctive use models Hydro-economic optimization Water valuation/pricing
Prioritize investment in built systems
“Right-sized” infrastructure Ensure return on investment
Multi-criteria optimization
Proactive Watershed Management Tools and Techniques