Transboundary water resources play a significant role in Eastern Europe, the Caucasus and Central Asia (EECCA). A great number of major water basins that were previously national within the former Soviet Union are now transboundary. Managing these waters in a sustainable way requires effective transboundary cooperation. Significant experience was gained in the region in recent years in different river basins. However, contacts between the experts involved are limited, and their experience and knowledge are not efficiently shared and used.