What it the disadvantage of hydro?

Answer 1

Many things might be a problem with hydroelectric generation. A dam blocks the river and floods a large area of land. Dams block migratory routes of fishes like salmon. Dams regulate river flow and usually prevent seasonal flooding. The absence of seasonal flooding changes downstream ecosystems.

Disadvantages of Hydroelectric Energy....

· Impact: Where there was once a free flowing river, there is now a large lump of concrete and metal. The possible effects of this on the river life can be devastating. Habitats become separated; fish and animals cannot reproduce or even feed on fish downstream and find their food source.

· Size: These dams are very large, and I could understand objection to their construction on aesthetic grounds.

· Expense: A common theme in renewable energy, dams are not cheap to build. Just think of the vast effort required to divert a river long enough to dam it, the amount of material required and extreme safety measures which must be put in place for the dam to be made safe. A lot of investment is required.

The disadvantages are that the change in water flow will effect the fish and making space to put the hydro facility can cause the deaths of plants and animals as well as destruction of habitat.
It can kill lots of fishy. Also, it affects the river downstream from the dam built.
it is danger for human being in case of electric shock
it is danger for human being in case of electric shock

1. It can be renewable
2. Is inexpensive

The disadvantages are - It can be dangerous to aquatic ecosystems. - People need to relocate where the reserviors are planned - It can produce large amounts of methane and carbon dioxide in tropical regions. - Failures of large dams may kill people and leave some of them homeless.
dangerous to aquatic ecosystems, can produce large amounts of methane and carbon dioxide in tropical regions, dams are very expensive to build.
the disadvantages are - it can be dangerous to aquatic ecosystems.

- People need to relocate where the reserviors are planned

- It can produce large amounts of methane and carbon dioxide in tropical regions.

- Failures of large dams may kill people and leave some of them homeless.

Disadvantages

• The dams are very expensive to build.

  However, many dams are also used for flood control or irrigation, so building costs can be shared.

• Building a large dam will flood a very large area upstream, causing problems for animals 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.

More Information and Some CorrectionsMany of the disadvantages of hydroelectric power are environmental in nature. Traditional hydropower involves flooding a large are of a stream basin. However, most modern hydro development in the US involves retrofitting existing dams with power generating facilities, resulting in no flooding at all. Other environmental concerns involve issues like diverting streamflow from its natural channel; changes in streamflow quantity; changes in streamflow quality; and direct or mechanical impacts on fish and other wildlife.

Hydroelectric power plants do NOT, however, produce methane or carbon dioxide or any other harmful gas, in tropical regions or anywhere else. Nor do they have direct negative effects on the quality of the water they use.

One key environmental issue in recent years is the allegation that new hydro facilities, especially those installed at existing dams, can act to prevent aeration of the water that may occur when the water passes through the dam's gates or valves, thereby reducing levels of dissolved oxygen downstream. This effect is of particular concern on waterways that are heavily developed, such as the Colorado River hydro and irrigation system and the Ohio River navigation system. In such systems, it is feared that the non-aeration at each sequential installation would accumulate in such a way as to allow the dissolved oxygen levels to drop below what are needed to support the stream's ecosystem.

Other disadvantages of hydroelectric power include high initial cost and low dependability factor, mainly due to the obvious dependency on rainfall.

Answer 2

Hydroelectric energy has many benefits, since it is a clean source of energy that makes use of water but does not use up the water. The problem with it is that this type of energy requires dams to be built, and the dams interfere with the natural flow of the water. It affects everything downstream from the dam and also impacts much of the river upstream from the dam.

Answer 3

It can require a great deal of land to be turned over to lakes formed when dams are built.

Dams can also impact the habitat of the river, which has had some impact on salmon and other migrating fish populations.

It would not be possible to generate sufficient power from hydroelectric dams to meet demand.

Overall, positives likely outweigh the negatives in some situations.

Answer 4

The construction of dams on rivers places sections of wilderness areas under water. The lakes created by dam construction change the habitat to one for aquatic species -- not land mammals and plant species.

Answer 5

While they are a clean and steady source of good power, they do tend to cause issues with fish and can cause major pooling issues upstream.

Answer 6

No, hydroelectirc energy is good for the environment, and it helps create power.

Answer 7

Hydroelectricity can flood dams and the area around it including animal habitat. Hydroelectricity also costs millions of dollars and is hard to produce.

Answer 8

high maintenence demand and low yield