Your Questions About Hydroelectric Power Disadvantages

admin answers:

Hi there,
disadvantages::
The dams are very expensive to build.
However, many dams are also used for flood control , so building costs can be shared.

Building a large dam will flood a very large area upstream, causing problems for fish,etc, that used to live there.

Finding a suitable site can be difficult – the impact on residents and the environment may be unacceptable.

Water quality and quantity downstream can be affected, which can have an impact on plant life.

Advantages:
Once the dam is built, the energy is virtually free.

No waste or pollution produced.

Much more reliable than wind, solar or wave power.

Water can be stored above the dam ready to cope with peaks in demand.

Hydro-electric power stations can increase to full power very quickly, unlike other power stations.

Electricity can be generated constantly.

admin answers:

The build-up of water rots the trees, which makes bacteria that reacts with the rock formations and poisons the water with mercury.

The massive buildup of water also destroys habitat and can cause catastrophic flood damage if the dam breaks.

admin answers:

Resources – water, you gotta have water and it needs to fall from a height to drive the generators.

Advantage – clean (no greenhouse gases), reservoirs provide water during dry periods.
Disadvantages – water source must be constant (only about 10% of US power comes from hydro) and you have to dam up a river or two.

Economics – well, it takes a lot of concrete (generally) but the structure tends to lasty a while. (See the Hoover Dam)

admin answers:

The greatest disadvantages relate to the interruption to the normal flow of the river. This will influence the life forms which use the river, and result in siltation problems. Usually it results in reduced water flow downstream, which causes narrowing of the channel, invasion of the channel by new plant species, possible algal problems and a break in fish migration habits. The new dam will also destroy an environment amd habitats which are irreplaceable, and may also displace humans.

The advantages include cheap power, a permanent water supply, creation of a possible recreation area, providing a possible drought water supply to the river downstream.

The links below will explain further.

admin answers:

Well for me, so much in advantage… Why? First, because we are abundant in water, second, getting a location of the hydroelectricity plant is easy, we just find any falls that’s water is overflowing like niagara or angel…..

admin answers:

Easy,

http://tinyurl.com/6zpzrgx

Done.

admin answers:

Advantages :
A source of electricity
Electricity that is largely carbon neutral

Disadvantages:
Considerable cost of the development, which could be spent on other projects e.g. Hospital, library etc.
Environmental cost of the scheme due to the large reservoir created behind it, which alters the ecosystem, usually for the worse.

From the information you have given, it is impossible to give a recommendation as to whether it should be built or not, because that depends on external factors, such as the availability of other sources of power generation; the possibility of people currently living in the proposed reservoir area behind the dam etc.

As we can see, dams in the world are built in some areas, and are not built in others, therefore more data is needed to come up with the conclusion.

admin answers:

Most of them are renewable and mostly used to produce electricity.

admin answers:

Coal:
- a cheap energy source; it is not expensive to extract or to use to produce electricity
- ecological problems: the burning of coal is very polluting – sulphur – produces too much (CO2) – greenhouse gas

Oil:
- one of the most abundant energy resources – liguid is easy to transport
- burning leads to carbon emissions and drilling endangers the environment and ecosystem – transportation (by ship) can lead to spills

Natural gas:
- burns clean compared to cola, oil (less polluting)
- not a renewable source – recivering is very costly

Nuclear power:
- clear power with no atmospheric emissions
- potential of high risk disaster (Chernobyl)

Solar power:
- very abundant energy resource
- at this time extremely costly and cumbersome

Hydroelectric power:
- expands irrigation and provides drinking water
- dam building is very costly and is restricted to areas with flowing water

Geothermal power:
- no pollution and can be directly used to heat or produce electricity (thus very cheap)
- not available in many locations

Tidal power:
- once you’ve built it, tidal power is free and it produces no greenhouse gases or other waste
- only provides power when the tide is actually moving in or out – about 10 hrs /day

Biomass:
- available throughout the world and inexhaustible fuel source
- contribute a great deal to global warming and particulate pollution if directly burned

Interesting that you have left out Wind Power since it is a continuous source of clean of energy with no atmospheric emissions. It does use a lot of land for the wind mills and wind velocity must be over 7 mph.