The Fifth GEF Biennial International Waters Conference, Cairns, 26-29 October 2009 Global Changes and Water Resources Workshop The Merguellil catchment (central Tunisia): towards an integrated study of water resources and water uses Christian LEDUC Gestion de l'Eau, Acteurs, Usages IRD, UMR G-EAU, Montpellier, France leduc@ird. fr
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The Merguellil catchment (central Tunisia): towards an integrated study of water resources and water uses (IWC5 Presentation)
Christian Leduc, IRD, UMR G-EAU, Montpellier, France Presentation given during the 5th GEF Biennial International Waters Conference in Cairns, Australia (during the pre-conference workshop for freshwater ecosystems, Global Changes and Water Resources Workshop).
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The Fifth GEF Biennial International Waters Conference, Cairns, 26-29 October 2009
Global Changes and Water Resources Workshop
The Merguellil catchment (central Tunisia): towards an integrated study of
Possible consequences of overexploitation:deeper pumping more difficult and more expensiveresort to more salted water
GEF International Waters Conference, Cairns, Oct. 2009, Global Changes and Water Resources Workshop
GEF International Waters Conference, Cairns, Oct. 2009, Global Changes and Water Resources Workshop
Socio-economical surveys
Typology of farms and farmers
Behaviour of farmers facing changesin their physical environment (climate, soil fertility)in the regulations (law, water price, technical constraints)in the external market
Cooperation/competition between farmers (land rental, water sale) (family vs speculators, large vs small)
Spatial scales of benefit: personal-local-regional-national
GEF International Waters Conference, Cairns, Oct. 2009, Global Changes and Water Resources Workshop
Socio-economical surveys
Proposal of measures for protecting the water resourceacceptability - efficiency
Unexpected impacts:increasing irrigated areas after subsidising drip irrigation
Social equity vs profitability
Institutional analysis lack of coordination inside the same Ministrylimited involvement in local top-down associations
Conclusion
To manage together water supply and water demand
To integrate technical and socio-economical aspects
To build long-term sustainable proposals
Natural and human complexity beyond our models
Already in official files:
interconnection of big dams in Central Tunisiatransfer channels from Northern Tunisia
GEF International Waters Conference, Cairns, Oct. 2009, Global Changes and Water Resources Workshop
GEF International Waters Conference, Cairns, Oct. 2009, Global Changes and Water Resources Workshop
Second International Conference on Climate, Sustainability andDevelopment in Semi-arid Regions - ICID 2010
Fortaleza, 16-20 August 2010www.icid18.org
Contribution to the Rio+20 UN conference on development and environment1) Climate and Environment2) Climate and Sustainable Development3) Governance and Sustainable Development4) Policy Processes and Institutions.
Submissions of papers, panels, round tables welcome