Kalpasar Project Gets Fresh Push: India Plans 64-km Dam Across Gulf of Khambhat

The Kalpasar Project, a long-proposed infrastructure scheme to build a dam across the Gulf of Khambhat in Gujarat, has received a renewed push with the India–Netherlands signing of a Letter of Intent (LOI) on technical cooperation. The Detailed Project Report (DPR), which will confirm the technical and economic viability of the project, is reported to be in its final stages with the National Centre for Coastal Research (NCCR), Chennai.

The Kalpasar Project proposes a 64-kilometre-long dam stretching across the Gulf of Khambhat (also called the Gulf of Cambay), a narrow inlet of the Arabian Sea on the western coast of Gujarat. The dam would convert the northern portion of the gulf into a large freshwater reservoir spanning approximately 2,000 square kilometres. The proposed reservoir would have a gross storage capacity of around 13,000 million cubic metres (MCM) — larger than the Sardar Sarovar Dam on the Narmada River, which has a capacity of about 9,460 MCM. The concept was first put forward nearly four decades ago to address the chronic water scarcity faced by the Saurashtra region. The project's name, Kalpasar, is derived from the mythological Kalpa Vriksha — the wish-fulfilling tree — reflecting the transformative scale of what is being proposed.

The project aims to harness river water from several major rivers, including the Mahi, Sabarmati, and Dhadhar, which currently drain into the sea unused. Key objectives include: providing irrigation water to nearly 10 lakh hectares across nine districts of Saurashtra; reducing road distance between Bharuch and Bhavnagar from approximately 240 km to around 60 km via a transport corridor built over the dam structure; and generating up to 2,500 MW of renewable energy, partly through harnessing the tidal potential of the gulf. The Gulf of Khambhat is known for having among the highest tidal ranges in India, making it suitable for tidal energy generation — though that component remains under study.

Despite technical feasibility being noted in a 1988–89 reconnaissance study, the project has faced decades of delays due to its sheer engineering complexity. The Gulf of Khambhat experiences very strong tidal currents, and the central challenge is how to close the dam at its narrowest point, where tidal velocity increases sharply as construction from both ends progresses. Environmental concerns are also significant: the Sabarmati and Mahi rivers carry considerable pollution load, and the reservoir's water quality would depend on improving river standards before impoundment. The project will require both environmental and coastal clearances, and construction — once approvals are in place — is estimated to take around 15 years. The estimated project cost is at least ₹1.2 lakh crore.

For exam preparation, the Kalpasar Project is a high-relevance topic across multiple papers. It sits at the intersection of water resources, physical geography of India (Gulf of Khambhat, tidal zones), infrastructure policy, and environmental concerns. Key facts to remember: it is a proposed/under-study project, NOT a completed one; the reservoir would be a sea-to-freshwater conversion; it is located in Gujarat; it involves the rivers Mahi, Sabarmati, and Dhadhar; and it connects Bharuch to Bhavnagar. UPSC aspirants should also note the tidal energy angle and the no-displacement feature, which sets it apart from conventional dam projects.