Project Brief
Kalpasar is a water resources project involving creation of fresh water reservoir in the Gulf of Khambhat for meeting demand of irrigation, domestic and industrial water supply
Vision
To create world’s largest fresh water reservoir in sea, by constructing 30 km long dam in the Gulf of Khambhat, to store more than 10,000 MCM of surface water, i.e. 25% of volume of State’s average annual rain water inflow.
Project details:
The development of Kalpasar reservoir will lead to the development of other associated projects i.e. use of top of the dam across the Gulf as a surface transport link, potential development of fisheries, reclamation of saline land around the fresh water reservoir etc.
Investment Opportunities
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Development of 2,000 sq.km. of world’s biggest fresh water reservoir in sea
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6 lane road on periphery of the reservoir
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10 lane 30 km. road connecting Bhavnagar and Bharuch
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Solar and Wind Power oppor tunities, Tourism development, Biofuel park, fisheries etc.
Nodal department
Kalpasar Department, NWRWS, Government of Gujarat
Why Project is required?
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Gujarat is a water scarce state, with 6.39% of geographical area, 5% of population & only 2% of water resources.71% of water resources available in 25% of geographical area of central & south Gujarat.
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In Saurashtra region per capita water availability is only 540 M3/annum against 1700 m3/annum minimum requirement.
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In Saurashtra region,only 15 lakh ha agricultural land will cover under irrigation (including Sardar Sarovar Project), against 42 lakh ha agricultural land. Hence, 27 lakh ha agricultural land will remain rainfed.
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The excessive pumping of groundwater resulted in intrusion of saline water up to 10 km of entire coastal belt of Saurashtra.
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The water storage capacity of Gujarat state is 20480 Mm3 in 196 medium & major reservoirs, against the total rainwater availability of 38000 MCM per annum.
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Non availability of any suitable site for major irrigation scheme in the state, the “Gulf of Khambhat Development Project” is the only option available to store 10,000 MCM rainwater.
Salient features (Tentative)
| Length of dam between two shores of Gulf |
Approx. 30 km |
| Top of dam |
100m wide
10 lane road + railway |
Reservoir features:
(i) Full Reservoir Level(FRL)
(ii) Maximum Water Level(MWL)
(iii) Minimum Draw Down Level(MDDL)
(iv) Live storage
(v) Storage between MWL & FRL
(vi)Reservoir area |
(+) 3.0m
(+) 4.0m
(-) 4.0m
10500 Mm3
1900 Mm3
2000 Sq.km
|
Bhadbhut Barrage & Narmada Diversion Canal
(i) Barrage including earthen dykes
(ii) Narmada Diversion Canal
Discharge
Length |
10 to 12 km
100000 cusecs
32 km |
Irrigation Command
(i) Water envisaged for irrigation
(ii) Envisaged three garland canal
Discharge
Length
Elevation |
6558 Mm3
4000 to 6000 cusecs
600 to 700 km
EL50 m, EL80 m, EL100 m |
| Life of reservoir |
400 to 500 years |
| Ground Water Quality Improvement in Catchment area |
7,00000 Ha |
| Land recover between EL + 5.0m to EL+ 8.0m |
150000 to 200000 ha |
Reduction in distance
Bhavnagar – Dahej
Bhavnagar – South Gujarat |
200 km
225 km |
| Ports |
Bhavnagar port will be rejuvenate, Dahej port will be outside of reservoir, New ports are proposed at down stream of dam. |
| Rivers debouching in the reservoir |
Sabarmati, Mahi, Dhadhar, Narmada (through diversion canal), Limbadi Bhogavo, Sukhbhadar, Utavali, Keri, and Vagad |
| Construction of dam |
5 to 7 years |
Benefits of the Project
Irrigation Benefit
10.54 lakh ha. land in 39 talukas of 6 districts of Saurashtra region will get irrigation facilities including rejuvenation of rivers and filling of more than 60 existing dams as well as check dams, tidal regulators, spreading channels permanently.
Perceived Agricultural Benefits
Transportation Benefits
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Substantial saving in travel time and fuel due to reduction in distance by about 200 km between Bhavnagar and Surat.
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Surat is one of the fastest growing city in the country and the diamond oriented business hub of the world.
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Most of the diamond workers (more than 10 lakhs) are migrated from Saurashtra (Mostly, from Bhavanagr, Amreli district).
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After the completion of dam and Bhadbhut Barrage, the route from Bhavnagar to Surat will be Bhavnagar—Dahej—Hansot—Olpad—Surat.
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New coastal highway will be developed to connect present petro-chemical hub Hazira (Surat) to future petro-chemical hub PCPIR (Dahej).
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10 lane road is proposed on the top of the dam. 75000 vehicles per day is estimated for year 2020, and 1,00,000 vehicles per day for year 2030.
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The toll-tax generation is estimated approximately Rs. 1500 crore for year 2020 and Rs. 2000 crore for year 2030.
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Considering 10% I.R.R., Capital investment of Rs.15,000 crore to Rs. 20,000 crore may likely available from transport component (30% to 40% cost of the project)
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Gulf of Khambhat is one of the Gulf in world having maximum tide of 11 m and the average tide of 8.8 m .
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During the high tide and flood in Narmada, Mahi, Sabarmati river etc., the sea water rise up to level of +7.0 m to +8.0 m from MSL.
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After closure of the Gulf of Khambhat, land which is frequently submerged during high tide will be permanently opened.
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About 1.5 to 2 lakh ha land along the periphery of reservoir will be opened which can be used for the project development.
