Why are smaller dams better than bigger dams?

Answer 1

The answer there is more pressure on smaller dams which creates MORE electricity.

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Sorry but that makes no sense. The electricity generated depends on rate of flow and head available, not on dam size. In fact the higher the dam the greater the head (depth hence water-pressure at the turbine), though this can be increased still further by piping the water to a power-station situated further down the valley instead of at the dam foot.

A more useful advantage of a smaller dam is its smaller environmental effect.

Answer 2

big dams: big dams have become a matter of controversy. a large number of people are displaced when their homes and villages have to be submerged to creat big dams.

small dams:as the work remains suspended,the costs escalate.it gets its support from non government organizations.small dams mayset up in seismic zones.