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What else can I help you with?
Why are dams built so big?
They are designed to hold back alot of water.
How the building of dams affects the lives of the people and the ecology in the region?
Depends on the size of the dam, and how the water is managed. Big dams will flood big areas of land, and limit the amount of water flowing downstream, which can cause drought. Dams can also stop seasonal flooding, which the wildilfe might have adapted to.
What are some advantages to dams?
I know that one advantage to dams, is that they get power by the running water. Another, is that people can swim there and fish there because there is usually a big body of water like a lake in front of it.
How many dams are on the river colordo?
There are 11 dams which currently impound water and/or produce hydroelectric power on the Missouri River. These are: Canyon Ferry, Holter, Black Eagle, Rainbow, Ryan, and Fort Peck Dams in Montana; Garrison Dam in North Dakota; Oahe, Big Bend, Fort Randall, and Gavins Point Dams in South Dakota.
What is difference between big dam and small dam?
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.
Are dams expensive to build?
Depends on how big they are.
Why are smaller dams better than bigger dams?
The answer there is more pressure on smaller dams which creates MORE electricity. +++ 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.
Are hydroelectric dams harmful to the water?
Well, there's been some talk that the pressures generated as it goes through the turbines would be detrimental to plankton and stuff, but I don't think anything's been proven. The big thing about hydroelectric dams is that they are big, and they change the landscape quite a lot.
What kind of plants are used to make electricity for dams?
In big dams (like hoover or grand coulee), when the water flows through, it spins these huge magnets that creates static electricity in massive amounts that is then sent to a sub station to be processed from there.
Is one large dam better than two or more small dams?
The answer depends on what you mean by "better", in other words, what your purpose is. The answer also depends on the dam sites and other factors such as construction cost. Lets assume you are talking about dams on a uniform valley, and that we ignore other factors such as construction expense. If the dams are to control erosion, then probably two dams are as good as one. If the dams are to provide a reservoir of drinking water, then its easy to see that one dam holds more water: just think of replacing the downstream small dam with the big dam (whose top is at greater elevation than the top of the upstream small dam) and you can visualize it holds more water than the two small dams.) If the dams are to generate electricity, then loosely speaking, one large dam is equivalent to two small dams. This is true only if the water of the lower dam reaches the base of the upper small dam. Then the equivalent volume of water goes through both the pair of small dams and the large dam, and the sum of the heads of the two small dams equals the head of the large dam, so the generated electricity is the same.
How big can a dam get?
Most dams are 80,90 or even 100 yards.
Do large rivers require large dams?
Yes,Becouse they are big.
