Pre Investment Study on Irrigation Canals and Dams of India

Country: India State: Tamilnadu Capacity: 20.4MW 
Click to Go Back to Main Page Client: Joint UNDP/ESMAP Energy: 84.7GWh
SECSD reviewed the design of seven schemes aggregating to 20MW with an annual energy of 85GWh. 

In Tamil Nadu, several of the major irrigation schemes draw water from three rivers: the Cauvery river in the central zone; the Ponniar river in the north; and the Vaigai river which is adjacent to the Cauvery river. The Tamil Nadu Electricity Board (TNEB) has completed investigations and pre- feasibility studies for mini-hydro prospects at irrigation dams at Lower Bhavani, Amaravarthy, Thirmurthy, Sathanur, Peechiparai, Perunchani, and Aliyar. Also, schemes have recently been commissioned on three dams (Lower Bhavani, Pykara, and Vaigai). Although the TNEB also has investigated the mini-hydropower potential of several major irrigation canal systems in the state, the power potential of the canal systems combined is limited to about 6 MW. There are some 26 drops on the Cauvery Canal, 40 drops on the Periyar Canal, and over 60 drops on the Parambikulam Canal. The present thrust of the TNEB is to develop the dam based schemes.

The case of Sathanur Scheme illustrates the preliminary design procedure of dam based schemes.

TAMILNADU WITH PROJECTS HANDLED

PROJECT

Q
 (m3/s)
H
 (m)
P
 (kW)
E
 (GWh)
Cost
 (MUSD)
Cost/kW
(USD)
EIRR
 (%)

IRRIGATION DAM BASED SCHEMES

Aliyar 5 30 2 x 1250 9.32 0.988 395 38.5
Amaravathy 12 21 2 x 1000 10.58 1.391 695 27.4
Lower Bhavani 30 15 2 x 3500 24.25 2.648 378 34.6
Pechiparai 12 10 2 x 650 5.95 1.067 821 19.7
Perunchani 7.5 15 2 x 650 5.10 1.056 812 21.3
Sathanur 12 30 2 x 2500 21.82 1.782 356 44.0
Thirumurthy 7.5 13 2 x 650 7.73 1.128 868 30.4
               
TOTAL     20,400 84.7 10.06 493  

AMARAVATHI DAM

THIRUMURTHY DAM

AMARAVATHI DAM

LIST OF PROJECTS HANDLED IN TAMILNADU

THIRUMURTHY DAM

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