Handbook on Water Management - page 128

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Adaptation inTransboundaryBasins:
As 60 per cent of global freshwater flows cross national boundaries, transboundary
cooperation in adaptation is necessary to prevent possible negative impacts of unilateral
adaptation measures on other riparian countries and to support the coordination of
adaptation measures at the river/lake-basin or aquifer level. Cooperation can enable joint
development of more cost-effective solutions, which offer benefits to all or several riparian
Parties. For example, uncertainty can be reduced through the exchange of information
and combining the impact assessments andmodel results throughout the basin and thus
increasing the reliability of modelling results. Transboundary cooperation in adaptation
also helps to locatemeasures, such as flood protection infrastructure, in the basin where
they have the optimum effect, which may be in another riparian country. Transboundary
cooperation thushelps tosharecostsandbenefitsof adaptationand to increase theoverall
efficiencyandeffectivenessof adaptation inabasin.
The publication intends to compile, analyse and disseminate experiences, and thereby
to demonstrate and illustrate important steps and lessons learned as well as good
practices to take into account when developing a climate change adaptation strategy for
water management in the basin or transboundary context. It includes lessons learned
and good practicesmainly from the programme of pilot projects under theUnitedNations
EconomicCommission forEuropeConventionon theProtectionandUseof Transboundary
Watercourses and International Lakes implemented since 2010 in cooperation with
partner organizations such as the Organization for Security and Cooperation in Europe
and the United Nations Development Programme in the framework of the Environment
and Security Initiative. It also includes lessons and examples from the ECE/INBO global
network of basins andnumerous other organizationsworkingonwater and climate change
in transboundary basins, such as the International Union for Conservation of Nature, the
The publication serves as a complement to the Guidance on Water and Adaptation to
ClimateChangeaswell as to theprevioushandbooksof the International Networkof Basin
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