Christina Leb is an associate member of the Platform for International Water Law at the University of Geneva and a consultant for the World Bank focusing on transboundary water resources management and cooperation.

• Introduction; Part I. Acknowledging Interdependence: 1. Cooperation between sovereign states; 2. Development of international water law; Part II. A General Duty to Cooperate: What Does it Mean?: 3. The duty to cooperate and concurrence of principles; 4. Informing cooperation; 5. Adoption of joint measures; Part III. Dealing with Evolving Challenges: 6. International protection of vital human water needs; 7. Emerging international cooperation on global water challenges; 8. Conclusion; Annex: consideration of cooperation in international treaties.

'Readers will find the final section of Leb's study, addressed to the emerging challenges for transboundary water management, a valuable reflection on the way transboundary water law is increasingly influenced by the evolution of international human rights law and global hydrological threats associated with climate change.' Steve Mumme, The Journal of Water Law