Dams

A barrier constructed across a waterway to control the flow or raise the level of water.

3,548 Questions
Physics
Dams

What is the water pressure at the bottom of a dam with a depth of 200 m?

In very round numbers, the pressure at the surface of the water due to the atmosphere above it

is 14.7 pounds per square inch, or about 100 kPa, and it increases by that amount with each

additional 10 meters of depth. So at the depth of 200 meters, the total is the pressure of the

atmosphere plus 20 times as much additional, or roughly 309 pounds per square inch (2100 kPa).

Notice that it doesn't matter whether you're talking about the bottom of Hoover Dam or the bottom

of a 200-meter soda-straw. The length and width of the pool are irrelevant. The only dimension that

contributes to the pressure is the depth.

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Hydro Power
Dams

How much money does the hydroelectric dam make?

about $0.04 per Kilowatt in PA

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China and Chinese Territories
Hydro Power
Dams

Human features of china near the 3 gorges dam?

There is the yanzte river bridge

i think that is near the 3 gorges dam anyway!

hope i helped Sarah

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Dams

What do you call a man made dam?

A bund

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Astronomy
Planet Earth
Dams

Did the 3 gouges dam slow the earths rotation?

Not anything noticable.

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Dams

How many gates are in Hirakud Dam?

There are 64 sluice gates and 34 crest gates at the Hirakud dam for discharge of excess water, officials said.

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Dams

What is the widest dam in the world?

The widest dam in the world is the Three Gorges Dam at 1.4 miles. Grand Coulee Dam is about 1 mile wide, and Hoover dam is about 1,200 feet wide, or a little less than one fifth of a mile, approximately.

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Dams

What are the differrent types of dams?

  1. classification according to use,
    • Storage dam
    • Diversion dam
    • Detention dam
  2. Classification according to hydraulic design
    • Non-overflow dam
    • Overflow dam
  3. Classification according to material
    • Rigid dams
    • Non rigid dams
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Hydro Power
Waterfalls
Dams
Hoover Dam

How many water turbines are there in the Hoover dam?

there are 17 water turbines in the hoover dam, good luck on your homework lazy piece of poo

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Pakistan
Lakes and Rivers
Dams

Name the dam built on river jhelum?

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China and Chinese Territories
Dams

How does the three gorges dam effect wildlife?

fish downstream are starved of nutrients and due to increased water pollution, many animals die from water poisoning.

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Dams

What are the 10 important uses of water?

water is used in dams to provide electricity.

it is used in amusement parks.

it is used for daily activities such as bathing ,brushing,drinking etc.

it is used for agricultural (i) For drinking purpose.

(iii) For building construction

(iv) For the generation of steam for industrial use and electricity generation

(v) For generating hydroelectricity

(vi) For the manufacture of hydrogen, oxygen and water gas.

(vii) As a solvent.

(viii) For irrigation purposes.use.

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Dams
Mississippi River

How many locks and dams are on the Mississippi River?

111

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Dams
Hoover Dam

How much power dose Hoover Dam supply?

Hoover dam delivers around four billion kilowatt hours of power annually. This is about one seventh of the twenty-one billion kilowatt hours of power generated by the nation's hydroelectric power source, Grand Coulee Dam.

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Dams
Hoover Dam

In what year did the water go over the spillway at Hoover Dam?

1994

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Dams

What municipality is hartbeespoort dam in?

Madibeng Municipality

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Science
Rain and Flooding
Dams
The Difference Between

What is the difference between dam and barrage?

Both the dam and barrage are barriers constructed across a river or natural water course for diverting water into a canal mainly for purposes of irrigation, water supply etc. or into a channel or a tunnel for generation of power.

In case of a barrage, its entire length across the river i.e. between the banks is provided with gates having their bottom sill near the river bed level. Thus, the storage behind the barrage is solely created by the height of the gates.

The dam on the other hand has spillway gates almost near its top level and the storage behind the dam is mainly due to the height of concrete structure and partially due to the gate height.

In both the cases, however, the number and size of gates is adequate to pass the design flood during monsoons.

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Dams
Economics
Business and Industry

What are the advantages and disadvantages of division of labor?

Advantages:

1. Workers are trained in one task and specialise in this- this increases efficiency and output.

2. Less time is wasted moving from one workbench to another.

3. Production is faster and thus more products are produced.

Disadvantages:

1. Workers can become doing the same job- efficiency might fall.

2. If one worker is absent and no one else can do the job, production might be stopped.

3. This will ultimately affect the rate of production and will affect the economy of the company.
boredom of work

lost of crafts man ship

interdependency

unemployment

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Dams

What are the advantages and disadvantages of building Dams?

The Advantages of building Dams is that it controls the water running through a specific river. Building the Dam will stop the river flooding and destroying people's living areas.

Not only does it provide protection from certain areas, it also provides H.E.P (Hydro-Electric Power) which gives millions of people cheap electricity.

But the problem with Dams is that they are extremely expensive to build and maintain. It would take several decades to make a profit out of it.

The 3 Gorges Dam is an example of a Dam and so is the Hoover Dam!

(Case Study) By Lewis Ian Latham from Knowsley Park CFL.

The 3 Gorges Dam is the largest of its kind in Asia and located on the Yangzte River. The power created from this dam supplies China one tenth of their requirements which is a great deal as it is more than 3x larger than the UK alone. The people protected from this dam have risen over the years to above 2 million civilians, the power is clean which helps ecosystems, wildlife and air purity (a big problem in China)

However.... Over 2 million civilians were therefore displaced and had to move many miles to relocate mainly travelling to Chongqing. Both land slides and Earthquakes have been triggered from this dam as the water fluctuates over 30m annually so the flow can be maintained to protect the rural area. The weight from the dam puts pressure on the ground below and continues on to trigger earthquakes throughout the local areas. Behind every dam ever created can be found a resevoir, the one located behind the 3 Gorges is VERY LONG and DEEP. Over 100 Heritage Sites were lost and 13 Cities, 140 towns, 1300 villages, 1500 factories and 100,000 acres of land were submerged by the resevoir....

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Arizona
Nevada
Dams
Hoover Dam

Where is the Hoover Dam?

Hoover Dam is in the Black Canyon of the Colorado River, on the border between Arizona and Nevada in the USA.

At the bottom or southern end of Lake Mead at the Nevada-Arizona border. Located in the Black Canyon on the Colorado River, Hoover Dam lies about thirty miles southeast of Las Vegas, Nevada.

Hoover Dam is on the border of Nevada and Arizona. For all information see below.

Hoover Dam is spans the Colorado River between Arizona and Nevada.


Hoover dam is on the Colorado river at the point where it crosses the Arizona-Nevada border.

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Arizona
Nevada
Dams
Hoover Dam

What are the positive effects of the Hoover Dam reservoir?

The Hoover Dam provides a supply of water for many cities, including Los Angeles, San Diego and Phoenix. It is used to generate Hydrolectric Power (HEP) which relases no pollutants. Obviously, the Dam is used to prevent flooding in the seven states in which it runs through. It is also used for irrigation.

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Environmental Issues
Lakes and Rivers
Dams

What are some of the pros and cons of reservoir and dams?

A Pro of having a reservoir is that it gives nearby towns and villages water, a con to a reservoir is that You have to flood the animals habitats that lived on the land.

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Deforestation and Habitat Loss
Dams

What will happen to the environment if a dam is built?

Answer

A dam was built in Canada years ago. And one day the controller thought that the water level was too high so he let the water run out into the river that had been dammed.

It just so happened that a large group of migrating cariboo wanted to cross that same river that same day. Needless to say the water level was so high in the river that all the cariboo drowned and never made it to the other side.

So my answer is: Maybe nothing bad will happen to us, but maybe a lot of bad things will happen the animals near the dam.

Obviously, a large area is submerged when a dam is built, and this may be home to unique and endangered flora and fauna. Water which flows from hydroelectric dams is from the bottom of the dam where it is cold, dark, low in oxygen, and almost lifeless. This affects the ecosystem for many miles downstream.

Benefit

The reservoir created by a dam, while taking away some terrestrial habitat, can improve wetland, shoreline, and aquatic habitat.

Another perspective...

I have not heard of any examples of reservoirs improving wetlands except maybe in arid climates, but then many types of wetlands do not naturally belong in arid climates. Also, they do not create aquatic habitat so much as just change it from a naturally flowing wild river to a lake, which is a completely different water body and supports a completely different ecosystem.

Dams do provide more shoreline probably, and also help control water supply, generate electricity, improve agriculture, help in flood control, and provide additional water contact recreational opportunities.

However, dams are, by and large, damaging to the environment. They disrupt the natural flow regime of a river, disconnecting the river from its flood plain. The previous commenter mentioned dams improving wetlands. That may be true around the reservoir, but usually, all the wetlands wetlands below the dam suffer and often disappear completely.

We like to think that reservoirs help to improve water supply and aid in flood control, but sometimes, dams can have exactly the opposite effect. In many years, average rainfall will result in our ability to operate dams to their full effect, capturing more the snowmelt, reserving water for increased demand later in the year, controlling potential flooding from heavy rainstorms, etc. And while engineeers have done a lot of good for us, I have zero confidence in the ability of engineers to overcome nature in the long run. A river and its wetlands are already designed to deliver exactly the amount of water for natural communities in the watershed. Wetlands have numerous functions essential to healthy riverine processes. They serve as habitat for aquatic and terrestrial wildlife, serve as nurseries for young fishes and amphibians, and help filter out pollutants. They also act like sponges, absorbing water during the spring melt and releasing it back to the river later in the year when the river requires more water. All of those ecosystem functions may be taken away when a dam is built.

In addition, natural communities in the river are adapted to river life. Dams interrupt those communities. Dams are responsible for endangering numerous species, including salmon and freshwater mussels. They are hurting salmon by impairing the ability of adult salmon to swim up their home rivers to spawn, and also impede the ability of spawned salmon fry to swim downstream as they migrate toward the ocean. Also, as a family, the Unionidae (freshwater mussels) are probably the most endangered family of any in the animal kingdom. Most freshwater mussels require flow, an some exist in very localized populations. So when a dam is built and suddenly there is no flow, whole species of mussels may go extinct, and many probably already have.

Unintended consequences

Many dams have been built to control the flow of rivers. Recent flooding in the midwestern United States is thought to be caused not by climate change but the fact that the dams have allowed silt to build up and, in effect, have shallowed the riverbed. Periodic natural flooding creates a deeper channel and lessens the severity of future flood events, and this is not possible with the system of dams the way it is.

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Pakistan
Dams

Where is warsak dam located in Pakistan?

Warsak dam is situated on the river Kabul about. 32.2 km away from Peshawar

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Civil Engineering
Dams

Why dams are called multipurpose projects?

Yes it's multi purpose base on the following reasons 1. it can b use for irrigation 2. It can be use for public water supply 3. it also use for hydropower plants 4. For flood controll 5. For recreational purpose: more 2 come

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