This report assesses the geopolitical impact of a possible dam at the Great Bend of the Brahmaputra. In particular, it exams the dam as a potential source of coercive leverage China may gain over India. A dam there would create four likely strategic effects: it would very likely consolidate Beijing’s political control over its distant borderlands; it would create the potential for massive flooding as a tool of violence; it may affect human settlement and economic patterns on the Indian side of the border, downstream; and it would give Beijing water and data that it could withhold from India as bargaining leverage in unrelated negotiations.

To mitigate those challenges and risks, the report provides three policy recommendations for the Indian Government and its partners in Australia and the US. First, it recommends the establishment of an open-source, publicly available data repository, based on satellite sensing, to disseminate information about the physical impacts of the Great Bend Dam. Second, it recommends that like-minded governments use international legal arguments to pressure Beijing to abide by global norms and conventions. Third, it recommends that the Quad—the informal group comprising Australia, India, Japan and the US—use its humanitarian assistance and disaster relief (HADR) guidelines to begin to share information and build capacity for dam-related contingencies.