NEELAM SANJEEVA REDDY SAGAR SRISAILAM PROJECT (NSRSSP)
Objectives/Functions of the Organisation:
The objective of this unit is Operation and Maintenance of Dam and to provide Irrigation facilities and drinking water supply through AMRProject.
. Schemes and Programmes undertaken by the HOD with details:
A) NSRSSP Dam:
The Dam is constructed in stone masonry and concrete to a height of 143.26 Metres and to a length of 512 Metres. It is designed as Gravity Dam. Slight curvature with a radius of 10,930 M is given to improve the sliding stability resistance. The Dam is built in 22 blocks with contraction joints with spillway in deep river course and with non over flow section on the flanks. The spillway is provided with 12 radial gates for impounding the water and for flood regulation. The reservoir was built up to its Full Reservoir Level (FRL) + 269.75 M (885 Ft) in 1985 and the spillway is in operation since then onwards. The reservoir has a present storage capacity of 7465 M. Cum (263 TMC) at FRL as per 1997 Hydrographic survey.
The project provides water for generation of 770 MW of Power in 7 units of 110 MW each from Right side Power house and 900 MW in 6 units of 150 MW each from Left Side Power House. The power units on Right side flank and Left side flank are being maintained by APGENCO. Since inception of the Project, the Power generated from Left and Right flank Power Houses is 64,763 Million units (up to 31-03-2007).
B) AMR Project (SLBC):
Nalgonda is one of the backward and endemically drought prone districts of Andhra Pradesh State in India . The rainfall is low and erratic and does not sustain crop. Worse than that, the ground water table is not only low, but also highly polluted with fluorides and the ground water containing 1.5 to 4.20 PPM of fluoride in certain parts of district, has become unfit for human consumption and cattle population. Many people and cattle are affected with fluorosis for which there is no treatment. The people of the area agitated on the problems with a demand to provide safe drinking water. There are no other water resources for providing drinking water and irrigation facilities to these areas, except diversion of waters of mighty Krishna River flowing for a length of 85 kms in southern boundary of the district.
In view of the above, the Srisailam Left Bank Canal Project ( presently AMR Project ) was contemplated in 1983, to provide irrigation facilities in drought prone areas of Nalgonda District for 3 lakh acre (I.D), besides supplying drinking water to the fluoride affected villages enroute, utilizing 30 TMC of Krishna Water. This scheme has two alternatives.
Gravity scheme from foreshore of Srisailam Reservoir, through two Tunnels.
Lift scheme from foreshore of Nagarjuna Sagar Reservoir.
The works on main canal from common point (i.e., km 25.000) were taken up during 1983-84, pending finalization of Head Works.
In April, 1995, the Government decided to take up Lift Scheme from the foreshore of Nagarjuna Sagar Reservoir, to achieve early benefits, as the Tunnel Scheme would require 7 to 8 years time for its completion.
1. AMRP LIFT SCHEME:
The scheme contemplates lifting of water at two locations from foreshore of Nagarjuna Sagar Project Reservoir and envisages to provide irrigation facilities to an extent of about 1,09,250 hectare (2.70 lakh acre of I.D.) land in 21 Mandals of Nalgonda District, beside providing drinking water to 516 fluoride affected villages. The High Level Canal runs at an elevation +233.000m and the Low Level Canal at +177.700m. The High Level Canal provides irrigation for 2.20 lakh acre, while the Low Level Canal covers 50,000 acre
HIGH LEVEL CANAL (HLC):
(i) Head works: The Head works of High Level Lift Scheme such as Approach Channel, Cistern, Link Canal and Akkampally Balancing Reservoir(AKBR) including commissioning of 4 Pumps of 18 MW (25,000 HP) having a discharging capacity of 600 Cusecs each are completed.
(ii) Main Canal: The Main Canal from AKBR i.e. KM 23.20 to confluence of Musi Reservoir ( KM 136.150) is completed. The works on Ujdayasamudram Tank are almost completed except erection of Gates for Surplus weir, which is in progress.
(iii) Distributories/ Irrigation Potential: The works on distributary system for an ayacut of 72,500 acre were taken up under normal departmental system (Non-EPC) and the works of distributory system for balance ayacut of 1, 47,500 acre were taken up under EPC system in 4 packages. The works on distributary system are completed up to sub-minor level for an ayacut of 1, 10,000 acre.
LOW LEVEL CANAL (LLC):
The main aim of Low Level Canal which runs at + 177.70 M contour is to draw water by gravity, during flood season and to lift water by means of 3x4 MW pumps during non flood season from foreshore of Nagarjuna Sagar Reservoir, to irrigate an ayacut of 50,000 acre in Nalgonda District. The total length of Canal is about 85 KM.
The works on Main Canal up to km 27.000 including Approach Channel, Head Regulator are completed, except 2.00 km where construction of two major aqueducts are in progress. The balance works on Low Level Canal including Pumping station are grounded in three packages under EPC system and they are in progress.
It is proposed to create IP of 50,000 acre under this canal by Kharif, 2009.
Sprinkler Irrigation using Bauer Rainstar equipment:
The Government have decided to take up at least two pilot projects on Sprinkler/Drip Irrigation. Accordingly, the Sprinkler Irrigation is proposed in AMR Project as a Pilot Project to assess actual savings of water and to know the efficiency of the system. A meeting with the farmers of Pothunur (V) and Madaram (V) was convened, to convince and to take up Sprinkler Irrigation as a Pilot Project in their lands. The agreement was concluded with M/s BAUER, an international leading company, for supplying and erection of 12 units of Bauer Rainstar equipment, at a cost of 1,41,824.92 Euros (approximately Rs 79.00 lakh) for irrigating 694 acre. All the works for erection of equipment were completed and all the units were commissioned on 20.12.2006 and the departmental Engineers are trained by the Engineer of the firm. Ground nut crop is raised in 300 acre in the above area in Rabi 2006, by running 8 Units of Rainstar equipment. The Rainstar units worked successfully during the above crop period.