0
There are two main reasons for a dam's broad-base design, and both are explained by the fact that all materials have limited strengths. The only practical way to increase strength is by adding material.
The first idea is that a dam has to support its own weight. The heavier a dam gets, the more material is needed at the base to support itself. Hence very large dams have enormous bases.
The second idea is that the dam has to also support water behind it. The top of the dam is thinner because it does not have to support too much water; only the surface of the water needs support. But as the water gets deeper, the dam has to support all that water above , and then its own weight.
At the bottom, the dam has to support all the water and its own weight. This means that as you get lower, the dam has to get stronger. And as mentioned above, the only practical way to do so is to add material.
What else can I help you with?
What major hazard is created by low-head dams?
Low-head dams can create a hazard known as a drowning machine due to the strong recirculating currents they produce at the base of the dam. These currents can trap and hold objects, swimmers, or boats, making it difficult for them to escape. This can lead to dangerous situations and potential drownings.
Hydroelectric dams use the kinetic energy of water to produce electrical energy What is the environmental drawback of building hydroelectric dams?
One environmental drawback of building hydroelectric dams is the disruption of river ecosystems, including changes in water flow, sediment transport, and fish migration patterns. Dams can also lead to reduced water quality downstream and the displacement of communities and wildlife due to flooding of land for reservoirs.
What are the potential consequences of water dams breaking?
The potential consequences of water dams breaking include flooding, destruction of property, loss of life, displacement of communities, and environmental damage.
The amount of energy produced by power-generating dams is?
For the amount of energy produce, answer varies depend on size of installation. It can range from few kW in pico-hydro to thousand of MW in large hydropower system. For ratio of hydropower use in electricity production, answer varies among country depending on the available resource. Base on year 2010, 16% of world's electricity is hydropower.
Two lakes of equal depth are dammed on lake backs up 15km and the other backs up 30km What is the difference in pressure on the dams?
This question is set up to trick you. You don't need to know how much water surrounds the dam, because it is irrelevant. Assuming the atmospheric pressure is the same for both dams, depth is the only factor that affects fluid pressure. It's simply evaluating your knowledge of basic hydrostatic principles. So, for any depth, these two lakes have no difference in pressure.
Why do dams have a very broad base?
Dams must hold back water of a certain depth, determined by the height of the dam. The pressure exerted by this water on the dam is dependent in part by its depth, since the base of the dam must be able to hold pressures exerted by the weight of all the water above the base. Since the pressure is greater at the base, the dam is broader at the base.
What are the differences between earthen dams and masonry dams?
Earthen dams have very wide base and suitable to pervious foundation.
What major hazard is created by low -head dam?
Low-head dams are dangerous because people fail to realize that these dams are just as dangerous as larger dams. The movement of the water at the base can pull people under and trap them. These low-head dams have been nicknamed 'drowning machines.'
How does a universal bank spread its costs over a broader base of activities?
A universal bank can spread it cost over a broader base of activities and generate more revenues by offering a bundle of products. -Cyrille Ballerta
Why is the base of a candle broader?
Stability, they fall over if you put the broad end up.
Why are dams built stronger and broader at the bottom?
Because water pressure is more intense at depth than it is near the surface - hence the dam has to be stronger at the bottom - it withstands more pressure at the bottom.
What are positive dams?
dams
How do dams not cause pollution?
The dam itself causes no pollution but the submerged vegetation in the reservoir behind the dam can decompose creating methane, a potent greenhouse gas. To prevent this it would be necessary to remove all vegetation and organic rich soil from the area proposed for the reservoir down to a clay base (or install a non-organic base).
How many dams are there in Tasmania?
there are about 50 dams
What is the benefit of self incompatibity to the flowering plants?
Self incompatibility favours out crossing which leads to broader genetic base
What major hazard is created by low-head dams?
Low-head dams can create a hazard known as a drowning machine due to the strong recirculating currents they produce at the base of the dam. These currents can trap and hold objects, swimmers, or boats, making it difficult for them to escape. This can lead to dangerous situations and potential drownings.
How many dams does the river Rhine have?
how many dams in the river rhine11 dams whith hydropower stations .
