Sunday, June 12, 2011

Hydrological Data used in Optimization

The capacity and energy potential of a partcular option is dependent upon the river fiows. The Mean monthly flows and the long-term daily flows ~ at the Intake Site of Likhu - IV Hydroelectric Project were derived from the Hydrometric Station No. 660 on the Likhu R.iver. These fiows were used in the computations of power and energy for the Project Optimization. These data and the Annual Flow Duration Curve, and Monthly Fiow Duration Curves are presented in Volume V: Appendix G. The 95% flow expedience values for each month are also Included in this Appendix.
In order to study the Pondage capacity of the reservoir behind the dam, a Pondage storage capacity was developed, which is reproduced in Annex - A.
The Environmental Impact Assessment (EIA) Study hos indicated a need for compensation flow releases from the headworks. The Likhu River regime studies indicate that, in order to maintain "a minimum depth of water in the River between the headworks and the first major tributary, i.e. Salpu Khola, a release in the order of 0.6 m3js is required. This flow is consequently not available for power generation, and has been deducted from the River flows while assessing the capacity and energy potential of the different options.

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