Enhancing benefits from aquatic ecosystems: Nakambe sub-basin Case study F. Gichuki and D. Coulibaly Enhancing basin level water productivity to achieve sustainable improvements in human and ecological well-being BFP Fisheries Workshop February 6-7, 2008
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Enhancing benefits from aquatic ecosystems: Nakambe sub-basin Case study
Presented at the Basin Focal Project Fisheries Workshop at Cali, Colombia, Feb 2008
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Enhancing benefits from aquatic
ecosystems: Nakambe sub-basin
Case study
F. Gichuki and D. Coulibaly
Enhancing basin level water productivity to achieve sustainable improvements in human and ecological well-being
BFP Fisheries Workshop
February 6-7, 2008
• Introduction
• Basin system, sub-systems and their interactions
• Nakambe basin overview
• External drivers
• Basin changes and impacts on aquatic ecosystems and
livelihoods
• Analytical tools
• Management interventions
Enhancing basin level water productivity to achieve sustainable improvements in human and ecological well-being
Presentation Outline
Enhancing basin level water productivity to achieve sustainable improvements in human and ecological well-being
Basin system and sub-systems
Ecosystem goods and services
Inputs and managem
ent controls
Inputs and managem
ent controls
Ecosystem goods and services
Enhancing basin level water productivity to achieve sustainable improvements in human and ecological well-being
Basin processes, aquatic ecosystems and livelihoods
Aquatic ecosystems
goods and services and
their livelihood outcomes
Enhancing basin level water productivity to achieve sustainable improvements in human and ecological well-being
Integrated basin management
Erosion
Water and other
material flows
Effects on livelihoods & ConservationSource: MEA, 2005
Enhancing basin level water productivity to achieve sustainable improvements in human and ecological well-being
Water cycle and ecosystemsDirect impacts on the
atmospheric ecosystem
Indirect impacts on
terrestrial ecosystems
Terrestr ial
ecosystems
Aquatic ecosystemsCoastal marine
ecosystems
Direct impacts on
terrestrial ecosystem
Indirect impacts on aquatic
ecosystem
Direct impacts on aquatic ecosystems
Indirect impacts on terrestrial ecosystem
Indirect impacts on coastal marine
ecosystem
Direct impacts on coastal marine
ecosystem
Indirect impacts
on aquatic
ecosystem
Indirect impacts on atmospheric
ecosystem
“blue” water
“green” water
Indirect impacts on
marine ecosystems
Indirect impacts on
aquatic ecosystems
indirect impacts on
atmospheric ecosystem
(through evapo-
transpiration cycle)
Subterranean ecosys tems
Direct impacts on subterranean ecosystems
Indirect impacts
on terrestrial ecosystems
Indirect impacts on aquatic ecosystems
Indirect impacts
on coastal marine ecosystems
Atmospheric ecosystems
Indirect impacts
on subterranean ecosystems
Enhancing basin level water productivity to achieve sustainable improvements in human and ecological well-being
Basin overview
Ouahigouya
0
50
100
150
200
250
Ouagadougou
050100150200250
January
February
March
April
May
June
July
August
September
October
November
DecemberPo
050100150200250
January
February
March
April
May
June
July
August
September
October
November
December
•Area – 40,836 km2
•climate – Unimodal rainfall
•Landform – Gentle slope
• Rainfall variability
• Demand for aquatic good and services
– Population growth
– Urbanization
– Increase in fish consumption
• Trade
– Local, national and international
• Contribution of basin to national economy
– Population, agriculture, hydropower and industry
Enhancing basin level water productivity to achieve sustainable improvements in human and ecological well-being
External drivers of change
1976
1977
1978
1979
1980
1981
1982
1983
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1985
1986
1987
1988
1989
1990
1991
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1994
1995
1996
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1998
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2000 2001
2002
2003
2004
2005
-2,5
-2,0
-1,5
-1,0
-0,5
0,0
0,5
1,0
1,5
2,0
• Land use change
• Water storage
• Hydrology
• Aquatic ecosystems
Enhancing basin level water productivity to achieve sustainable improvements in human and ecological well-being
Basin change and their impacts
Enhancing basin level water productivity to achieve sustainable improvements in human and ecological well-being