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Dams
A barrier constructed across a waterway to control the flow or raise the level of water.
1,255 Questions
What are main objectives of bhakra dam?
The main objectives of the Bhakra Dam, across the Sutlej River, were to provide water for irrigation, to generate electricity, and to act as a tourism spot.
Why do people have to be so dam nosy?
because people like gossip and knowing whats going on around them.if someone has been nosy towards you,then dont get mad at them.everybody gets curious.
Why was kallanai dam named kallanai dam?
it is made up of stone. it is basicaly very strong. so it is called as kallanai.
Where can one buy a dental dam?
You can purchase dental dams online through mass retailers like amazon.com and medical or healthy supply websites. Dental dams can be expensive so be sure to shop around to get the best deal.
No. Platypuses are nothing like beavers, and they do not build dams. Platypuses do not have teeth, so would be unable to gnaw wood to build dams. Their grinding plates are purely for grinding their food.
For shelter, platypuses dig burrows in the banks of the freshwater creeks, rivers or lakes where they do their hunting. These burrows can be over 30m in length (100 feet). The entrances are disguised beneath overhangs, or by tree roots and other vegetation. Platypuses have webbed feet with retractable webbing which enables them to dig their burrows.
What are the differences between tidal energy with the hydroelectric energy generated by a dam?
The same in principle, due to water falling under gravity. Hydro however is produced by a reservoir of water which depends on rainfall, whereas tidal is produced by tidal rise and fall, which is produced by gravitation between earth, moon, and sun
How is the volume of an odd-shaped dam calculated?
a special type of theodolite is needed, often shots are taken from helicopters or low flying planes. a German firm ( Wilde-Zeiss ) made a special theodolite for Dam-Deformation observation and survey work. this was an expensive instrument as it is far easier to make lenses, reflex mirrors, etc to work with straight axes and angles of approach, etc.
Yes because if it wasn't their wouldn't be any available hydroelectric power to use at all
It is one of the major dams on the river Nile, located on the Blue Nile in Sudan
The volume of water going over the dam and
the distance the water falls
What are the two ways of division of labor?
The advantages of division of labour are that it's faster, more efficient, & it leads to specialization.The disadvantages are that it's boring and demotivating for the workers, & that there's a loss of flexibilty, & workers have limited knowledge at the end of it.Ofc, these points need to be further expanded.
Are 'dam' and 'reservoir' the same?
The reservoir is behind the dam.
A reservoir could be a reservoir of talent; please see the related link below-
OOPS! -when used as a noun, a dam could be the pool of water behind the dam, or the barrier impeding the flow of water: Please see the other related link below:
Why is the three gorges dam bad?
the three gorges dam will destroy many of towns and villages once it is completed
Also:
- Approximately 1.2 million people were forcibly relocated by the Chinese government in order to facilitate the construction of the dam and subsequent submerging of the areas where they once lived and worked - with as little compensation of as little as 50 yuan, or $7 a month
- The dam and reservoir span at least 2 major faults and the pressure from the water is expected to trigger multiple earthquakes in the future - the only question is how many and how severe.
- Even partially filling the dam has caused multiple landslides - including once case causing 20 meter waves that killed 14 people and in another case burying a bus on a highway killing 30 people.
- Whole villages of people relocated to make room for the dam will have to move a second time because of the landslides and tremors,
- Biodiversity is threatened as the dam floods some habitats, reduces water flow to others, and alters weather patterns. Economic development has spurred deforestation and pollution in surrounding provinces in central China, endangering at least 57 plant species, including the Chinese dove tree and the dawn redwood. The reservoir created by the Three Gorges dam threatens to flood the habitats of those species along with over 400 others. China is home to 10 percent of the world's vascular plants (those with stems, roots and leaves) and biologists estimate that half of China's animal and plant species, including the beloved giant panda and the Chinese sturgeon, are found no where else in the world. The Three Gorges area alone accounts for 20 percent of Chinese seed plants-more than 6,000 species.
- The dam further imperils delicate fish populations in the Yangtze. Downstream, near where the river empties into the East China Sea, the land around the Yangtze contains some of the densest clusters of human habitation in the world, and overfishing there has already endangered 25 of the river's 177 unique fish species. According to a 2003 letter to Science by Wuhan University ecologist Ping Xie, many of these fish evolved over time with the Yangtze flood plain. As the dam decreases flooding downstream, it will fragment the network of lakes around the middle as well as lower the Yangtze's water level, making it difficult for the fish to survive. The project has already contributed to the decline of the baiji dolphin, which is so rare that it is considered functionally extinct.
- When officials unveiled plans for the dam, they touted its ability to prevent floods downstream. Now, the dam seems to be causing the opposite problem, spurring drought in central and eastern China. In January, the China Daily (the country's largest English-language newspaper) reported that the Yangtze had reached its lowest level in 142 years-stranding dozens of ships along the waterway in Hubei and Jiangxi provinces. To make matters worse, China is now plowing ahead with a controversial $62-billion scheme to transfer water from the Yangtze to northern China, which is even more parched, through a network of tunnels and canals to be completed by 2050.
- At the mouth of the Yangtze residents of Shanghai, China's largest city, are experiencing water shortages. The decreased flow of fresh water also means that saltwater from the East China Sea now creeps farther upstream. This, in turn, seems to be causing a rise in the number of jellyfish, which compete with river fish for food and consume their eggs and larvae, thereby threatening native populations that are already dwindling as a result of overfishing. In 2004, a year after the dam was partially filled, scientists observed many of a jellyfish species in the Yangtze that had previously only reached the South China Sea.
Water dams are blocks put on river and lake routes to stop the flow of water and corner it to be used for useful purposes.
What is the largest dam in Montana?
The Fort Peck Dam is 21,026 feet in length and over 250 feet in height.
Only in specific locations do dams prevent drought, this can be viewed by comparing locations on ether side of Lake Volta in Ghana. If you are to the west (down wind) then during a general drought period rainfall increases by 12 to 14%. If to the east rainfall is reduced by 10 to 12%. This increased rainfall is the result of there being less cloud cover during the drought phase, thus higher solar energy to the lake, greater evaporation, thus higher rainfall down wind.
To the greater extent dams hold back fresh water that would normally 'float' upon the salty water when it reaches the sea. This also provide a temperature difference between the sea water and the river water. This damming effect reduces the appearance of these fresher water lakes that appear on the sea surface during rainy season or snow melt runoffs. Consequently evaporation is reduced with reduced rainfall down wind. This can be demonstrated by comparing mid summer runoff at Aswan on the Nile with reduced rainfall in Sub Saharan Africa (SSA):10N to 13N, Sudan westwards (Nicholsons dataset). The northerly (Hadley cell) wind brings the moisture south into SSA, but there is a notable year on year reduction in this moisture budget, drought. This same scenario probably applies to the effects of the dams on the US west coast affecting the Mid Western moisture budget (Ferrel Cell). Since there are 40,000 'large' dams, it remains to be concluded whether or not they are relevent in the global climate areana. £50 says they are!
How did the people build the Hoover Dam around the water?
They blasted tunnels -- as big as four-lane highways -- right through the canyon walls. For the next five years, the Colorado River gushed through these diversion tunnels while 8,000 workers toiled in the harsh, dry canyon bottom. Amazingly, they completed the dam in less than five years -- ahead of schedule and under budget.
