Run off River Plants Without Pondage and With Pondage in Hydro Power Plant

Sr. No.

Parameter

Run off River Plants

Without pondage

With pondage

1.

Water Storage

No

Yes

2.

Usage

Only when water is available

Used with available when water or with stored water

3.

Generating capacity

Depends primarily on rate of flow of water

Less dependent on available rate of flow of water.

4.

Seasonal changes

In rainy season, water wastage occurs while in low
run-off period water fails short to meet demand.

Due to facility of water storage, It is easier to
meet fluctuating demand

5.

Reliability

Less

More

6.

Cost

Economical

Expensive