Nizam Sagar Dam is an Indian dam named after the Nizam of Hyderabad. It is a

reservoir A reservoir (; ) is an enlarged lake behind a dam, usually built to water storage, store fresh water, often doubling for hydroelectric power generation. Reservoirs are created by controlling a watercourse that drains an existing body of wa ...

constructed across the Manjira River, a tributary of the Godavari River, between Achampet and BanjePally villages of the Kamareddy district in

Telangana Telangana is a States and union territories of India, state in India situated in the Southern India, south-central part of the Indian subcontinent on the high Deccan Plateau. It is the List of states and union territories of India by area, ele ...

India India, officially the Republic of India, is a country in South Asia. It is the List of countries and dependencies by area, seventh-largest country by area; the List of countries by population (United Nations), most populous country since ...

. It is located at about north-west of

Hyderabad Hyderabad is the capital and largest city of the Indian state of Telangana. It occupies on the Deccan Plateau along the banks of the Musi River (India), Musi River, in the northern part of Southern India. With an average altitude of , much ...

. Nizam Sagar is the oldest dam in the state of

History

Nizamsagar dam was constructed in 1923 by Mir Osman Ali Khan - the 7th Nizam of the erstwhile Hyderabad State. It was made by emptying over 40 villages length:.. The dam has an effective storage capacity of 724.9 Mcm (million cubic meters) or 25.6 tmc ft

The dam

Before Nizam Sagar was built, the Manjira River was not properly harnessed and little water was being used by diverting water at Ghanpur Anicut for Irrigating about and an open Channel called Mahaboob Nagar (Right Canal) in Medak District. The Ghanpur Anicut was the first scheme constructed across Manjira river in 1904 at a cost of Rs.18.00 Lakhs. Some years later, Nawab Ali Nawaj Jung Bahadur as Superintending Engineer added Fatch Nahar (Left canal) to increase the utility of the river later. The ayacut of was being irrigated under this Ghanpur Anicut that subsequently increased to as per actuals. Nizam sagar Project is the second irrigation scheme on Manjira river and the largest in the then Hyderabad state taken up during the year 1923 and completed by the year 1931. This Project was originally contemplated for utilization of 58.00 TMC of water to irrigate acres in Banswada, Bodhan, Nizamabad and Armoor Taluks of Nizamabad District. After reorganization of States in 1956, the Manjira basin was distributed among the three states viz., Maharashtra, Karnataka and Telangana. Different irrigation schemes have come up in above three states. Some of them to mention are: Manjira Barrage and Singur Project in Telangana to meet the drinking water needs of twin cities of Hyderabad and

Secunderabad Secunderabad () is a twin cities, twin city of Hyderabad and one of the six zones of the Greater Hyderabad Municipal Corporation (GHMC) in the States and union territories of India, Indian state of Telangana. It is the headquarters of the South ...

in Telangana. Karanja Project, Choukinala Project in Karnataka, Lower Tiruna Project, Manjira Project in Maharashtra State. Therefore, the inflows into Nizamsagar Project and as well as the low flows at Ghanpur Anicut during lean periods have dwindled considerably. Added to this the silting of reservoir has been at greater pace than designed for. From the investigation conducted by the A,.P.E.R.L. (Andhra Pradesh Engineering and Research Laboratories) Hyderabad in 1973, it was shown that the capacity of 29.7 TMC at original FRL of RL + has been reduced to 11.8 TMC. In the remodeling proposals F.R.L. has been raised from + to + and the capacity at this new FRL of + is 17.80 TMC. Apart from the above changes, out of the total localized ayacut of , have come under submergence of Sreeramsagar Project, have come in the command of Lakshmi canal and Kakatiya Canal of Sreeramsagar Project, and ayacut has not been getting water since inception of Nizamsagar Project. Thus, the settled ayacut of has come down to . The local people believe that everyone should visit this place at least once in whole life to make it complete. In view of the above enumerated facts, the inflows into Nizamsagar Project not only reduced but also delayed resulting in not only in the delayed commencement of agricultural operations in the ayacut but also some times loss of crop due to insufficient water supply. The problem has become more acute during the years 1972–73, 1993–94 and 1994–95.Babli dam

Salient features

Location: Achampet (Vill), Nizamsagar (Mandal) Kamareddy Dist. (Telangana) Longitude: 76° –56’ East Latitude: 18° – 10’ North River/Basin: Manjira / Godavari 21,694 km (8376 Sq.Miles.) i) Maharashtra: ii)Karnataka: ii)Andhra Pradesh: Water spreads: a) At MWL: 146.36 km (56.51 Sq.Miles) b) At FRL: 129.50 km (50.00 Sq.Miles) RESERVOIR DATA OLD NEW A) F.R.L. : +1400.50 +1405.00 B) M.W.L. : +1405.00 +1405.00 C)MDDL : +1376.00 D)Sill of regulator : +1364.00 E) TBL : +1412.00 1) ORIGINAL DESIGNED M.F.D. 1) Computed M.F.D. from C.A.: 5,25,000 C/s. 2) Proposed disposal: 4,73,577 C/s. Area Irrigated: i) Cultivatable command area: 2.75 Lakhs Acres. ii) Area localized: 2.31 Lakhs Acres. CAPACITY OF THE RESERVOIR. A) Gross: 29,716 Mcft. B) Live: 25,600 Mcft. C) Present capacity at +1405’: 17,803 Mcft. D) Present capacity @MDDL +1376’: 786 Mcft. Height of Dam above River Bed: 115.50 ft. Top width of dam: 14’-0" i) Gravity: 10,100 ft. ii)Composite: 5,200 ft Scouring sluice: 9 V. 8’x12’ Regulator sluices: 11 V.8’x10.5’ Main Canal: Off tae at R/F. Saddla Power House

Interstate Dispute

The water use entitlement of this project is 58 thousand million cubic feet (tmc) at 75% dependability (i.e. sufficient water is available in 3 out of 4 years) under Godavari Water Disputes Tribunal (GWDT). However the water dependability has reduced to 33% (i.e. sufficient water is available only once in 3 years) in last decade due to more water utilization by Maharashtra and Karnataka by developing excessive water use potential beyond their water use entitlements given by GWDT. Karnataka has constructed four barrages across the Manjira river and three more are under construction. Similarly, Maharashtra state constructed at least 30 barrages on main tributaries of Manjira river downstream of major dams for recharging ground water, drinking water and irrigation purposes. This very old major irrigation project has become unproductive for want of water inflows. Also the water quality / salinity &

alkalinity Alkalinity (from ) is the capacity of water to resist Freshwater acidification, acidification. It should not be confused with base (chemistry), basicity, which is an absolute measurement on the pH scale. Alkalinity is the strength of a buffer s ...

of inflows into this reservoir is becoming unsafe for irrigation use and human & cattle consumption. The ground water is also turning into high

salinity Salinity () is the saltiness or amount of salt (chemistry), salt dissolved in a body of water, called saline water (see also soil salinity). It is usually measured in g/L or g/kg (grams of salt per liter/kilogram of water; the latter is dimensio ...

& alkalinity water. Recently, the

water scarcity Water scarcity (closely related to water stress or water crisis) is the lack of fresh water resources to meet the standard water demand. There are two types of water scarcity. One is ''physical.'' The other is ''economic water scarcity''. Physic ...

problem of Pochampadu irrigation system is some extent resolved by supreme court but acute water scarcity faced by Nizam sagar irrigation project is not yet addressed. Supreme court verdict (section 83 ii b) on Babli Project dispute stipulated that the gates of Babhali barrage remain lifted during the monsoon season, i.e., 1 July to 28 October and there is no obstruction to the natural flow of Godavari river during monsoon season below the three dams (Paithan, Siddheshwar & Nizamsagar dams) mentioned in Clause II (i) of the agreement dated 06.10.1975 towards Pochampad dam. Thus Pochampadu reservoir is accorded first priority over any other reservoir (major, medium, minor, barrage, etc.) to receive the water generated from the Godavari basin area located below these three dams. As stipulated by Supreme court, central government has set up monitoring committee to implement / supervise the water sharing as per agreement dated 06.10.1975 and supreme court verdict. Telangana government shall take the dispute to supreme court to resolve the water scarcity problem of Nizam sagar irrigation project at the earliest as Maharashtra and Karnataka states are using in excess of permitted water by building new projects and the water availability is becoming more and more grim in the downstream Telangana state.

External links

Wikimapia map

References