World's largest freshwater coastal reservoir — a ₹1.3 lakh crore mega project across the Gulf of Khambhat that will transform water security and connectivity for Dholera SIR.
The Kalpasar Project, officially known as the Gulf of Khambhat Development Project, is one of India's most ambitious infrastructure undertakings. First envisioned in the 1980s, the project proposes building a massive dam across the Gulf of Khambhat (Cambay) to create a freshwater coastal reservoir — the largest of its kind in the world.
The concept is simple but ambitious: build a barrier across the sea to trap freshwater from rivers that currently flow unused into the ocean. The result would be a reservoir spanning approximately 1,800 square kilometres with a gross storage capacity of 7,807 million cubic metres (MCM) of live storage — larger than the Sardar Sarovar Dam's 9,460 MCM. This stored freshwater would serve irrigation, drinking water, and industrial needs across Saurashtra and parts of Gujarat, while a 16-lane road link over the dam would drastically reduce travel distances between Saurashtra and south Gujarat.
In May 2026, the project received its most significant push in decades when India and the Netherlands signed a Letter of Intent (LoI) for technical cooperation during Prime Minister Narendra Modi's visit to the Netherlands. This partnership, combined with the Detailed Project Report (DPR) reaching its finalisation stage, signals that Kalpasar is moving from concept to execution.
Government approved plan showing the 60+ km dyke alignment across the Gulf of Khambhat, connecting Bhavnagar to Bharuch.
The Gujarat government confirmed in December 2025 that the Detailed Project Report (DPR) is at the finalisation stage. The DPR, which determines the project's technical and economic viability, is being prepared by the National Centre for Coastal Research (NCCR) in Chennai. Once complete, it will go to the Expert Advisory Group and then to the state and Union governments for approvals.
B.N. Navalawala, chairman of the Expert Advisory Group for the Kalpasar Project and former secretary of the Ministry of Water Resources, confirmed that the DPR is almost in a final stage and involves internationally reputed institutions conducting detailed studies.
For FY 2024-25 and 2025-26, the Gujarat government has allocated ₹2 crore per year for preparatory work. After DPR finalisation and approvals, the project is planned to be completed in eight years from the start of construction.
The most significant recent development came in May 2026 during Prime Minister Modi's visit to the Netherlands. India's Ministry of Jal Shakti and the Netherlands' Ministry of Infrastructure and Water Management exchanged a Letter of Intent (LoI) for technical cooperation on the Kalpasar Project.
The two leaders visited the iconic Afsluitdijk Dam in the Netherlands — a 32-kilometre dam and causeway that is a global benchmark in flood control and freshwater storage. The visit highlighted the parallels between Afsluitdijk and Kalpasar, with both projects creating freshwater reservoirs from seawater barriers.
Dutch expertise in hydraulic engineering is world-renowned, and the Netherlands has centuries of experience in water management, land reclamation, and dam construction. This partnership brings that institutional knowledge to bear on one of India's most complex water infrastructure challenges.
Gujarat Chief Minister Bhupendra Patel publicly welcomed the agreement, calling it a major step for water security and climate-resilient infrastructure in Gujarat.
In May 2026, the Gujarat government sought environmental clearance for the project. The Pre-Feasibility Report proposes a 60.13-kilometre dyke between Kardej (near Bhavnagar) and Paniyadra (Bharuch), with a freshwater reservoir of approximately 1,600 km² and live storage of 7,807 MCM. The dyke would collect water from the Sabarmati, Mahi, and Dhadhar rivers.
Another official estimate puts the dam length at around 64 kilometres with a reservoir size of about 1,800 km² and gross storage of 7,807 MCM. The difference reflects that designs are still being optimised as the DPR is finalised.
The Kalpasar Project is not just a dam — it is an integrated infrastructure system with multiple components:
The centrepiece of the project. A massive reservoir created by damming the Gulf of Khambhat, trapping freshwater from rivers that currently flow into the sea. The reservoir would be the largest freshwater coastal reservoir in the world, providing water for irrigation, drinking, and industrial use across Saurashtra and Gujarat. The stored water would serve millions of people and thousands of industries, transforming water availability in one of India's most water-scarce regions.
Built atop the dam structure, a 16-lane highway would connect Bhavnagar in Saurashtra to Bharuch in south Gujarat. This would dramatically reduce the travel distance between the two regions, which currently requires a long detour around the Gulf. The road link would function as a critical logistics corridor, connecting Dholera SIR's airport and industrial zones to ports like Dahej and Hazira, and to the wider Gujarat industrial belt.
The updated 2026 proposal includes a wind-solar hybrid system capable of generating 2,500 million units annually. While the original plan included tidal power generation, this component was dropped from the main proposal in 2017. The project now focuses on renewable energy through wind and solar installations around the reservoir area, adding clean energy capacity to Gujarat's renewable portfolio.
The stored freshwater would feed an extensive irrigation network across Saurashtra, transforming agricultural productivity in the region. Currently, farming in Saurashtra depends heavily on monsoon rainfall and limited canal water. Kalpasar would provide year-round irrigation water, enabling multiple cropping cycles and higher agricultural output.
Dholera Special Investment Region lies on the western side of the Gulf of Khambhat and is one of the biggest beneficiaries of the Kalpasar Project. Here is what this means for Dholera:
Water availability is the single most critical factor for industrial development. The Kalpasar Project would ensure 24×7 freshwater availability in Dholera SIR, fundamentally changing the calculus for water-intensive industries.
Consider the implications for the Tata Semiconductor fab (₹91,000 crore) already under construction in Dholera. Semiconductor manufacturing requires enormous quantities of ultra-pure water. While Dholera's existing water infrastructure (Narmada canal supply, treatment plants) supports current needs, Kalpasar provides the long-term assurance that water supply will scale with industrial growth.
Beyond semiconductors, reliable freshwater access enables specialty chemicals, pharmaceuticals, food processing, and data centre cooling — all sectors that Dholera is actively courting. The reservoir also helps stabilise the water table and control salinity ingress along the coast, improving the long-term sustainability of Dholera's aquifer and surrounding agriculture.
The Kalpasar dyke/sea bridge would create a direct logistics corridor between Saurashtra and south Gujarat. For Dholera, this means:
Direct port access: Cargo from Dholera's international airport and manufacturing zones could reach deep-water ports like Dahej and Hazira more directly, bypassing current road bottlenecks around the Gulf.
Regional integration: Dholera becomes more tightly integrated with Gujarat's industrial heartland, Saurashtra's irrigated hinterland, and central Gujarat's manufacturing belt.
Logistics and warehousing: Better port-airport-industrial park integration translates into higher land uptake in industrial zones and stronger support for logistics parks, warehousing, and supporting residential demand.
Analysts expect dramatic land price re-rating once large-scale Kalpasar work begins. The project adds a powerful long-term catalyst on top of Dholera's existing growth drivers (airport, semiconductor city, expressway).
Think of it this way: the airport improves Dholera's air connectivity. The expressway improves its road connectivity. Kalpasar improves its water security and regional logistics connectivity — two foundational requirements that de-risk long-term industrial investment.
| Parameter | Kalpasar Project | Sardar Sarovar Dam |
|---|---|---|
| Type | Coastal freshwater reservoir | River dam (Narmada) |
| Storage Capacity | 7,807 MCM (gross) | 9,460 MCM |
| Length | 60-64 km (dyke/dam) | 1.2 km (dam height 138.68m) |
| Reservoir Area | ~1,800 km² | 375 km² |
| Cost | ₹1.2-1.33 lakh crore | ₹82,000 crore (revised) |
| Additional Features | 16-lane road, tidal power, irrigation | Hydropower, irrigation |
| Village Displacement | Zero — no human displacement | Over 32,000 families displaced |
Aerial view — the reservoir would span approximately 1,800 km² across the Gulf of Khambhat.
Closeup of the dam/barrage structure with integrated road link and tidal power infrastructure.
One of Kalpasar's most remarkable features is that it achieves massive water storage with zero village displacement. Unlike the Sardar Sarovar Dam, which displaced over 32,000 families, Kalpasar's design along the half-circle of the Gulf of Khambhat means no existing village would be submerged.
As B.N. Navalawala explained: If you look at the Gujarat map, from Bharuch to Bhavnagar it forms a half-circle, and the reservoir will be created along it. The existing villages will remain. Some villages may lose access, but we can categorically say that there will be no displacement of any human being or villages.
This makes Kalpasar politically and socially easier to implement than most large dam projects in India, which historically face significant displacement-related opposition.
The project has a complex timeline given its scale:
1980s: Project first conceptualised
2000s-2010s: Pre-feasibility studies, institutional committees formed (Steering Council of Ministers, Committee of Secretaries, Expert Advisory Group)
2024-2026: DPR finalisation stage, India-Netherlands LoI signed, environmental clearance sought
Post-approval: 8-year construction target from commencement (per Gujarat government)
Full operation: Estimates range from 10-15 years depending on source and approval timeline
The project cost is estimated at ₹1.2-1.33 lakh crore, making it one of India's most expensive infrastructure projects. Funding will likely involve a mix of central government, Gujarat government, multilateral institutions, and potentially Dutch cooperation financing.
Kalpasar doesn't exist in isolation. It's part of a comprehensive water infrastructure ecosystem being built for Dholera SIR:
Narmada Canal Supply: Dholera already receives water from the Narmada canal system via the Bhadbhut barrage, providing current industrial and domestic water needs.
Zero Liquid Discharge: Dholera's smart city plan includes 100% wastewater recycling through dual pipeline systems, reducing freshwater demand.
Water Treatment Plants: Advanced treatment facilities ensure water quality for industrial and domestic use.
Artificial River System: Planned aesthetic and functional water features that integrate with the overall water management strategy.
Elevated Water Tanks: Distributed storage and pressure management across the SIR.
Kalpasar adds the ultimate backstop — a massive freshwater reserve that ensures long-term water security even as Dholera scales to accommodate millions of residents and thousands of industries.
For real estate investors and businesses looking at Dholera SIR, Kalpasar adds three critical layers to the investment thesis:
1. De-risked water supply: The single biggest concern for industrial investors in water-scarce Gujarat is long-term water availability. Kalpasar addresses this conclusively.
2. Enhanced connectivity: The sea bridge creates new logistics corridors that make Dholera more accessible and commercially viable for trade-intensive industries.
3. Perception shift: Kalpasar transforms Dholera from a smart city with good infrastructure to a smart city with the best water security in India. This perception shift drives land value appreciation.
The full benefits are 10-15 years out, but in real estate, perception gets priced in well before completion. As DPR finalisation, tenders, and early construction progress, expect the Kalpasar narrative to increasingly feature in Dholera's growth story.
This page is compiled from verified government and media sources:
Times of India — Gujarat government assembly reply on Kalpasar DPR status (December 2025)
Press Information Bureau (PIB) — Official Government of India press release on India-Netherlands LoI (May 17, 2026)
Hindustan Times — Interview with B.N. Navalawala, Chairman, Expert Advisory Group for Kalpasar Project
Government of Gujarat — Official Kalpasar Project website (kalpasar.gujarat.gov.in)
