World’s rivers are fundamental to social and natural well-being but profoundly affected by mega-damming and pollution. In response to top-down and technocratic approaches, in many places, riverine communities practice forms of ‘river co-governance’, integrating ecological, cultural, political, economic and technological dimensions. In addition, new water justice movements (NWJMs) have emerged worldwide to creatively transform local ideas for ‘enlivening rivers’ into global action and vice versa. The Summer School aimed to provide PhD students who conduct research on these ‘river commons’ and NWJMs with transdisciplinary concepts and approaches for studying their emerging ideas, concepts, proposals and strategies. The different sessions thereby focused on conceptualizing river systems in all senses, and capacity-building for (understanding and supporting) river knowledge co-creation and democratisation from the bottom up. Click here to download the Summer School Report.