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