Which of the following is an unintended consequence of the use of hydroelectric dams for electricity generation?

Which of the following is an unintended consequence of the use of hydroelectric dams for electricity generation? … There will be more erosion than sediment deposition downstream from the hydroelectric dam. The population of fish that migrate to areas upstream from the hydroelectric dam to breed will increase.

What are the negative effects of hydroelectric dams?

Hydropower dams degrade water quality along rivers. Water that flows downstream from the dams is depleted of oxygen, which harms many aquatic animals. The reservoirs above dams are susceptible to harmful algal blooms, and can leach toxic metals such as mercury from submerged soil.

What is one unintended consequence of building dams?

The reservoir effect describes cases where over-reliance on reservoirs increases the potential damage caused by drought and water shortage. The expansion of reservoirs often reduces incentives for preparedness and adaptive actions, thus increasing the negative impacts of water shortage.

What are the effects of hydroelectric power?

Hydropower does not pollute the water or the air. However, hydropower facilities can have large environmental impacts by changing the environment and affecting land use, homes, and natural habitats in the dam area.

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What are 5 disadvantages of hydropower?

Here are a few of the main disadvantages of hydroelectric energy.

  • It Has an Environmental Impact. Perhaps the largest disadvantage of hydroelectric energy is the impact it can have on the environment.
  • It Displaces People.
  • It’s Expensive.
  • There are Limited Reservoirs.
  • There are Droughts.
  • It’s Not Always Safe.

Which of the following is disadvantage of hydropower?

dams can be constructed only in limited areas. large areas of land get submerged within water when dams are erected. submerged vegetation rots under anaerobic conditions and produce methane, a green house gas.

What are the problems caused by dams?

Large dams have junction rectifier to the extinction of the many fish and alternative aquatic species, huge losses of forest, the disappearance of birds in floodplains, erosion of deltas, wetland, and farmland, and many other irreversible impacts.

What are some effects of building a dam quizlet?

Dams and effects of Dams

  • Water storage for irrigation & public water supply.
  • Flood control works well for moderate floods (RI=2-25 yr)
  • Cheap source of power.
  • Clean source of power (no CO2 emissions?)
  • Flexible source of power. …
  • Recreation opportunities (fishing, swimming, boating)
  • Improved river navigation.

How do dams affect groundwater?

Removal of natural vegetation and infiltration or leakage from constructed reservoirs or dams can bring the level of the watertable to rise and carry stored salts to the soil surface and waterways. Salinity levels in the groundwater will likely be altered as the results of natural recharge disruption.

What are the negative effects on the environment when building a large hydroelectric dam?

Flooding land for a hydroelectric reservoir has an extreme environmental impact: it destroys forest, wildlife habitat, agricultural land, and scenic lands. In many instances, such as the Three Gorges Dam in China, entire communities have also had to be relocated to make way for reservoirs [3].

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Which of the following is the most likely negative effect of damming rivers to supply hydroelectric energy?

Which is most likely the greatest impact on the environment when a dam is built for hydroelectric power production? The dam destroys habitats by creating reservoirs of water that flood lands upstream of the dam.

What are the advantages and disadvantages of using hydroelectric energy Brainly?


  • it is a very cheap source of energy.
  • it is renewable.
  • it is pollution-free.
  • it helps us to conserve fossil fuels as they may exhaust some day.
  • it is used to control floods and is used for irrigation.