However, hydropower, as with any major infrastructure development, inevitably brings changes to the environment and society, such as effecting people’s lands, rights and culture, and greenhouse gas emissions from reservoirs (Aung et al. 2020).
The results of our social literature review discuss the major positive and negative social impacts of hydroelectric development. Social benefits are primarily economic growth and improved flood control, while negative social impacts are displacement, adverse effects to human health, and livelihood changes.
From the above review, it is known that hydropower project have impacts on the environment. Change in hydrological flow regimes, deteriorating water quality, migration corridors barriers, sedimentation, greenhouse gas emission and biodiversity loss are environmental impacts of hydropower projects.
How does hydropower affect the community?
Just as reducing downstream water flow can cause a loss of habitat, creating reservoirs to generate electricity in storage and pumped storage hydropower systems often cause upstream flooding that destroys wildlife habitats, scenic areas, and prime farming land.
Social and environmental costs of hydropower are underestimated, study shows. … These communities will have to continue somehow making a living despite dwindling fish stocks for 15 or 20 years, for example, and the costs of these projects don’t take such economic and social losses into account.”
Furthermore, community-based solar initiatives can have positive social impacts, from decreased heating bills for low-income individuals, decreased dependency on public utilities, an improved environment from reduced pollution, and job creation.
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 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.
How does hydroelectricity impact the environment?
In addition to methane, hydropower can have significant environmental effects such as fish injury and impact on downstream water quality. By diverting water out of the water bodies for power, dams remove water needed for healthy in-stream ecosystems thereby disrupting the natural river flows.
How do hydroelectric dams impact the environment?
A dam and reservoir can also change natural water temperatures, water chemistry, river flow characteristics, and silt loads. All of these changes can affect the ecology and the physical characteristics of the river. These changes may have negative effects on native plants and on animals in and around the river.