What are the advantages and disadvantages for building large dams?

Answer 1

I believe PROS:

· Dams can store rain water or water directly from the river itself. Then, in case of a Drought, the dam will still have a relatively constant supply of water.

· Producing Power.

·

o Controls flooding & PROS:

o Dams can store rain water or water directly from the river itself. Then, in case of a Drought, the dam will still have a relatively constant supply of water.

o Producing Power.

o Controls flooding & provides recreational activities such as boating fishing and swimming, if the lake is not being used for drinking water (Dam Society).

o Simple design makes for inexpensive repairs and maintenance costs (Dam Society).

o Produce inexpensive (after completion) and clean power.

o Renewable energy source, because the water is not destroyed by passing through the dam.

o If needed, dams can be shut down instantly, where thermal plants take hours, and nuclear plants can take days! (Dam Society).

o Very few breakdowns.

o provides recreational activities such as boating fishing and swimming, if the lake is not being used for drinking water (Dam Society).

· Simple design makes for inexpensive repairs and maintenance costs (Dam Society).

· Produce inexpensive (after completion) and clean power.

· Renewable energy source, because the water is not destroyed by passing through the dam.

· If needed, dams can be shut down instantly, where thermal plants take hours, and nuclear plants can take days! (Dam Society).

· Very few breakdowns.

CONS:

· Hydroelectric power production require flooding of entire valleys and scenic areas.

· Disrupts natural seasonal changes in he river, and ecosystems can be destroyed.

· Ends flooding that help to clean out the silt in rivers, causing them to clog (Energy Laboratory).

· The silt that usually flows down to the Beaches and Estuaries is block by the dam.

· Studies show that the plant decay caused downstream of major dams produces as many greenhouse gasses as more conventional methods of producing electricity.

· Dams are expensive to build, and due to drought may become useless, or produce much less power than originally planned.

· A dam being build in Quebec will end up flooding an area as large as Switzerland (Energy Laboratory).

· Dams can break in a massive flash flood.

· Dams can store

rain water or water directly from the river itself. Then, in case of a Drought, the dam will still have a relatively constant supply of water.

· Producing Power.

Controls flooding & pro

Answer 2

biodiversity is affected

environmental problems

housing problems may arise

deforestation
It can eradicate the flood but it can bring earthquake,drought etc.
Dams eliminate forests hat absorb CO2 from the atmosphere- dams block the migration of fish, which make species go extinct, - Many people get displaced by building dams- Hydro power ruins beautiful landscapes- Constructing dams costs massive amounts of money- Dams are not a very nice sight, which might reduce amount of tourists- dams form lakes which flood people, animals,etc.-

Answer 3

The disadvantages are:

it cost alot and could lead into debt, it could flood, destroy wildlife and things around it and 10,000 had to be moved.

The advantages are:

Brings in fish which they can eat, provides water and brings in tourist.

Answer 4

Advantages of dams:

1. Dams are constructed based only on safety
2. Dams are used to store water
3. Dams are used in hydroelectric power generation to produce electricity.
4. Dams are used in irrigation purposes.
5. Dam's water is used for to supply water to domestic & industrial uses
6. Dams are used for agriculture in village
7. Dams prevent flooding
8. Dams create a walkway

Most dams are built to make a hydroelectric plant or to control the amount of water in a body of water, or both. So it could control water and/or generate electricity. Dams can keep water from flooding into towns, if the dam was built to get more land. Dams can also provide fresh water, too.

But there also disadvantages. A dam is cutting away water supply from the animals that used to live by the water, and could help contribute to extinction.

Answer 5

Advantages of dams:

1. Dams are constructed based only on safety
2. It is used to store water
3. It used in hydroelectric power generation
4. It is used in irrigation purposes.

Disadvantages of dams:

1. Requires skilled labour to construct
2. Strong abutments is needed.
   

Answer 6

they prevent floodingthey create a walk waythey create hyrdroelectric power

Answer 7

Que los dams son perfectos , pero vos OS sun pelotudo fracasado en la vida q venis a estos foro de wikiporonga a preguntar pelotudo.