Tidal power - Disadvantages
Damage. There is
considerable effect on the ecosystem. The exchange of
water volume between a basin and the sea is reduced, this
leads to the potential for increased pollution, because
pollution is left accumulating in the basin. Also,
because the exchange of volume is reduced, salinity of
the basin decreases and sediment accumulation increases.
Basically, anything we place in the water can and does
affect the ecosystem.
• Fish population.
Even with the best barrage designs, fish mortality rate
per pass through the barrage is about 15%. Solutions to
resolves this problem have either failed or are too
impractical and too expensive.
• Time of day.
Tides are predictable, but
power stations only generate power when the tide is
flowing in or out of the basin, which only happens during
certain times of the day.
Startup costs to build a
tidal energy plant is high, but the maintenance costs are
very low. This means that you will not see profits for a
few years, causing some investors to back out of the
project. This can be seen as both an advantage and
disadvantage, depending upon desired profit returns.
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