Q:

What are disadvantages of dams?

A:

Dams block fish migrations and keep sediment from washing downstream. When initially installed, dams usually cause flooding on the side of the dam where the water flows. Dams create large bodies of stagnant water, which have a few dangers, such as encouraging mosquito breeding.

Dams, especially large ones, have the potential to cause a lot of problems for the surrounding area, especially the area behind the dam where the water flows toward the blockage. There are disadvantages for both the nature and any people living in the area.

There are many negative effects on nature. Since dams block up flowing bodies of water, such as rivers, any animals that depend on the flow to reproduce or as part of their life cycle are put in danger. Migratory fish that mate in a different location than they live the rest of their lives, for example, are unable to mate and may decline in population. The buildup of water is also dangerous for plant life that grows on the natural shoreline of the water. The plant life is submerged and dies. In addition, the beneficial sediment that normally is washed down the river is blocked, which decreases the fertility of the soil downriver from the dam.

Many humans are displaced due to dams. Humans who live in an area that is to be flooded due to a new dam have to relocate and lose their homes to the rising water.


Is this answer helpful?

Similar Questions

  • Q:

    What are the advantages of dams?

    A:

    Dams provide economic, environmental and social advantages. They provide flood control, recreation, hydroelectric power, waste management, river navigation and wildlife habitat, and they control water supply.

    Full Answer >
    Filed Under:
  • Q:

    What are the disadvantages of using oil?

    A:

    One of the biggest disadvantages of using oil is that it is a nonrenewable source of energy, which means that once supplies are exhausted, there is no way to produce more. Oil also poses significant risks to the atmosphere and water bodies; oil spills, for instance, cause disastrous effects to local environments by destroying plants and organisms and are often expensive and time consuming to clean up.

    Full Answer >
    Filed Under:
  • Q:

    What are the disadvantages of biomass?

    A:

    Biomass is a type of biological material that is derived from organisms. It is a carbon-based product that also contains a mixture of hydrogen, oxygen, nitrogen and alkali earth metals. Biomass is created by organisms as waste products, and it can be used as an energy source.

    Full Answer >
    Filed Under:
  • Q:

    What are the advantages and disadvantages of offshore drilling?

    A:

    One of the advantages of offshore drilling is that it increases domestic oil production, while a disadvantage is the effect it has on the environment. While it has its positives, there are also definite negatives to offshore drilling.

    Full Answer >
    Filed Under:

Explore