Hydropolitics, the politics surrounding water resources, significantly impacts Indo-Bangladesh relations due to their shared geography and dependence on common transboundary rivers. Bangladesh, as a lower riparian country, is particularly vulnerable to upstream activities in India, making water sharing a perennial and often contentious issue.

Key Rivers and Disputes:

1. Ganges (Farakka Barrage): The most prominent issue revolves around the Ganges River. India constructed the Farakka Barrage in the 1970s to divert water to the Hooghly River to keep the Kolkata port navigable. Bangladesh argues that this diversion significantly reduces water flow during the dry season, leading to increased salinity, desertification, and adverse impacts on agriculture, fisheries, and the Sundarbans mangrove forest in its territory. While a 30-year water-sharing treaty was signed in 1996, ensuring minimum flows, concerns about its implementation and long-term impacts persist.
2. Teesta River: The Teesta River water-sharing dispute is another major point of contention. Despite multiple rounds of negotiations, a comprehensive agreement has remained elusive, primarily due to objections from the West Bengal state government in India. Bangladesh critically depends on Teesta waters for irrigation in its northern regions, and the lack of an agreement causes significant distress during dry periods, straining bilateral trust.
3. Brahmaputra and other common rivers: India and Bangladesh share 54 transboundary rivers. While the Ganges and Teesta are the most prominent, issues related to water management, flood control, and potential hydropower projects on other rivers also contribute to the hydropolitical landscape.

Impacts on Bilateral Relations:

• Source of Tension and Mistrust: Unresolved water-sharing disputes are a constant source of friction, fueling anti-India sentiments in Bangladesh and creating diplomatic challenges. The perception in Bangladesh is often that India, as the upper riparian, acts unilaterally without sufficient consideration for downstream impacts.
• Economic and Livelihood Impacts: Reduced water flow affects agricultural productivity, particularly during the dry season, impacting the livelihoods of millions in Bangladesh. Increased salinity affects drinking water supplies and damages ecosystems like the Sundarbans, which are vital for both countries.
• Environmental Concerns: Hydrological changes contribute to environmental degradation, including increased soil salinity, loss of biodiversity, and altered riverine ecosystems, which have cross-border implications.
• Migration: Environmental degradation and loss of livelihoods due to water scarcity can contribute to internal and cross-border migration, adding another layer of complexity to bilateral relations.
• Potential for Cooperation: Despite the disputes, there is also potential for cooperation. The Joint Rivers Commission (JRC) exists to discuss water-related issues. Collaborative efforts in flood forecasting, basin-wide management, and joint hydropower projects could transform water from a source of conflict into a catalyst for cooperation, fostering greater trust and regional stability. However, progress on these fronts has been slow.

In conclusion, hydropolitics remains a critical and sensitive dimension of Indo-Bangladesh relations. While other areas of cooperation exist, the unresolved water-sharing issues, particularly the Teesta, continue to cast a shadow, hindering the full potential of their bilateral partnership. Resolving these disputes through sustained dialogue, mutual understanding, and equitable sharing mechanisms is crucial for building a stronger and more cooperative relationship.