Large multipurpose dams in the Himalaya serve downstream water security but carry upstream social and seismic costs. Critically analyse.

The Kishau Multipurpose Project shows the Himalayan dam dilemma clearly. It is a 232.6 m concrete gravity dam on the Tons. Six states signed its agreement in 2026, and the Centre will pay 90% of the water component [1]. Its benefits flow to the plains while its risks stay in the hills. The statement is largely true, but the line between "downstream gains" and "upstream costs" is not as neat as it suggests.

Downstream water security: the gains

• Storage and irrigation: Kishau will store 1,562 MCM, irrigate 97,000 ha and generate 1,476 MU of hydropower [1].
• Urban drinking water: Upper Yamuna storages such as Lakhwar supply water to six states, including Delhi. Shares follow the 1994 Yamuna MoU [2].
• Cooperative federalism: Under the National Project model the Centre pays 90% [1][2]. This turned long-stalled interstate disputes into signed agreements.

Upstream costs: the burdens

• Social: Reservoirs in narrow valleys flood villages, farmland and forest. Hill communities lose land and livelihoods while cities in the plains get the water. This is an equity gap between upstream and downstream.
• Seismic and geological: The Himalaya is young, tectonically active terrain. A high dam adds reservoir load to fragile slopes.
• Cascading disasters: The Chamoli rock-ice avalanche (2021) washed away the 13.2 MW Rishiganga project and trapped workers at NTPC's Tapovan-Vishnugad site [3]. After the Joshimath land subsidence, construction there, including this project, was halted [4].

Critical appraisal: the split is not clean

• Risk also travels downstream: The Chamoli flood destroyed a bridge below the dam and cut off border villages [3]. A dam failure would hit the same plains that benefit from the dam.
• Benefits also stay upstream: Hydropower brings revenue to small hill states that have few other sources.
• Legal safeguards exist: The Dam Safety Act, 2021 requires surveillance, inspection and maintenance of specified dams to prevent dam-failure disasters [5]. How well it is enforced is still the real test.

Way forward

• Make Central money conditional: Release the 90% Central share only after updated seismic, displacement and rehabilitation studies are published.
• Share benefits: Give displaced families a share of revenue and free power.
• Monitor and warn: Set up early-warning systems and slope monitoring in each valley.
• Use water better downstream: Cut demand through efficient use, so that fewer new dams are needed.

Himalayan dams are neither a cure-all nor simply a danger. They provide water security, but only as safely and fairly as they are planned. The way forward is to plan by river basin, pay attention to seismic risk, and treat affected people as stakeholders with a share in the benefits. That approach can meet SDG 6 (clean water) without weakening SDG 13 (climate resilience) or the communities living upstream.