IWRA Webinar N°68

In collaboration with the International Association for Water Law (AIDA), this webinar delved into the complexities of water resource management under climate change. Paul Kibel, Executive Council member of AIDA, moderated the discussion and opened the webinar with a comprehensive overview of the challenges posed by climate change in transboundary river basins. With 653 registrants from around the world, the webinar showcased global interest in the topic, with participants joining from various countries including Canada, Nepal, Tanzania, and Italy. 

Mara Tignino discussed the role of climate change in interpreting principles of customary international water law. She highlighted three key principles: equitable and reasonable utilisation, emphasising human water needs as per the UN Global Water Conventions of 1992 and 1997; the duty not to cause significant harm, which requires considering climate change impacts on riparian countries; and the duty to cooperate, involving information exchange, project notifications, and environmental impact assessments. She also referenced the Indus Waters Treaty of 1960, noting the development of hydropower infrastructure under its framework.

The presentation by Dr. Malcolm Gander, highlighted the significant role of water vapor as a greenhouse gas, responsible for 41-67% of the heat trapped in our atmosphere. Unlike CO2 and methane, water vapor’s concentration is not directly influenced by human activities but increases with rising temperatures, leading to further warming. Gander emphasises the need to understand water vapor’s impact on climate change and its implications for water resource management.

Dr. Rosario Sanchez’s presentation on Climate Uncertainty and Water Challenges in the US-Mexico Border highlighted the severe stress on the Rio Grande Basin, which has lost 83% of its natural flow, affecting water supply for 15 million people. The presentation underscored the importance of adaptive management within the framework of the 1906 Convention and the 1944 Water Treaty to address reduced surface water availability and the impacts of climate change. Dr. Sanchez called for proactive and preventive measures to manage the basin’s water resources effectively amidst persistent climate uncertainties and growing urbanisation.

The webinar concluded with an interactive panel discussion where speakers shared insights and addressed audience questions.