Disadvantages of Hydroelectric power plant:



Initial cost of the hydroelectric power plant is high and comparatively the returns are in low rates.
The annual report importance of this capital cost is a large part of the annual cost of hydropower installations.
The development period of hydro projects is moderately large.
The gap between the groundwork and achievement of a project may spread from 10 years to 15 years.
Power generation is reliant on the capacity of water available, which may vary from year to year and season to season.
If the rainfall is in-time and satisfactory, only then the reasonable operation from the plant can be anticipated.
Such plants are often far away from the load center and require long transmission lines to deliver power.
The charges of transmission lines and losses in them are more.
Large hydroelectric plants disturb the bio network of the zone, along deforestation, extinguishing plants and relocating people.
Production of such plants is a limiting factor.
The stress is now extra on mini, small and micro hydroelectric power stations