Question

collect information about where a dam has been built in your area,or where the water is blocked, visit with your elders and write a description of the visit


please answer if you know the correct only​

Answer 1

Answer:

Explanation:

A dam is a barrier that stops or restricts the flow of surface water or underground streams. Reservoirs created by dams not only suppress floods but also provide water for activities such as irrigation, human consumption, industrial use, aquaculture, and navigability. Hydropower is often used in conjunction with dams to generate electricity. A dam can also be used to collect or store water which can be evenly distributed between locations. Dams generally serve the primary purpose of retaining water, while other structures such as floodgates or levees (also known as dikes) are used to manage or prevent water flow into specific land regions. The earliest known dam is the Jawa Dam in Jordan, dating to 3,000 BC.

Answer 2

Answer:

At the confined George part of the river, dams are constructed across the river. Calculations are made throughout the examination to determine the foundation's specifics and the reservoir's capacity. In the abutment hillocks, the river flow is often channelled in half width or through a tunnel. Excavated, treated, and concrete-filled foundations are used to raise the dam in blocks in the dry area. After the dam has been erected above the riverbed, the river's dry weather flow is alternately redirected on these blocks. After rerouting the flow, the opposing side is taken on and a dam is raised according to precise specifications.

Explanation:

The steps of building a dam are as follows:

1. Drain the area of the river valley where the engineers will be working. This can be done by redirecting river water into ponds or lakes for minor dams or via tunnels for large dams.
2. Construct a tiny dam as a barrier upstream and downstream.
3. Depending on the type of dam being built, different construction techniques are employed. The first stage often entails clearing the valley walls and river bed of loose rock and debris. The upstream edge of concrete-faced rockfill dams must have a foundation (or plinth) built around it. The concrete plinth acts as a foundation or link between the dam and the walls and floor of the valley. It plays a crucial part in preventing water leaking from the dam's margins. By drilling holes and injecting cement grout into rocky fissures, the area beneath the plinth is waterproofed. Waterstops, which are made of rubber and stainless steel, connect the dam's thin concrete face to its plinth on the upstream side.
4. Related work, such as establishing a power plant, is completed in this stage.
5. The dam is finished. The tunnels are shut. Lakes are now full. Water that was diverted resumes its original flow.

• Depending on the river system involved, building a dam has a number of drawbacks.
• Many Chinese dams, like the Aswan Dam on the Nile, have kept back silt that was once used to nourish farmland during seasonal floods. Chemical fertilisers are increasingly required by farmers to maintain high yields. The reservoirs are currently being filled with silt from the severely silt-laden waters, which might cause the hydroelectric potential to be lost.
• Reservoirs submerge towns, farms, and historical monuments. Communities in Turkey are being relocated from their usual bottom lands to higher elevation, which is an unproductive stony wasteland. This is due to a new dam.

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