Hydroelectric power remains a widely used source of renewable energy across the globe. The advantage of being a clean and sustainable energy source with low greenhouse gas emissions has been convincing enough for many.
Hydroelectric energy represents a form of renewable energy that can be generated by harnessing the power of falling or flowing water to produce electricity. The mechanism behind this form of energy is quite simple and easy to understand by anybody. This can usually be done by constructing dams or other huge structures to keep the flow of water under control. The energy resulting from the moving water will then be used to turn turbines, which will ultimately produce electricity.
What are the pros?
There are plenty of advantages that hydroelectric energy poses. Let’s remind about some of them below:
- Low greenhouse gas emissions:
Compared to fossil fuel-based power plants, hydroelectric power plants will produce minimal greenhouse gas emissions during their process of generating electricity. This obviously means that those power plants will contribute to lower overall carbon footprints.
- Long lifespan:
Perhaps not everybody knows that hydroelectric infrastructure, such as turbines and dams, have a long lifespan. They often exceed 50 years, proving to be a very durable and even cost-effective investment.
- Flexible generation:
Hydroelectric power plants won’t have trouble responding quickly to changes in electricity demand, which means that they often provide a level of flexibility when it comes to electricity generation.
- Reliable power supply:
Hydroelectric plants are able to provide a stable and consistent power supply because water flow can be controlled to meet varying energy demands.
- Renewable and sustainable:
Hydroelectric energy is also a renewable resource because it relies on the continuous water cycle. This means that we’re talking about a long-term and sustainable source of energy.
What are the cons?
You know what they say that everything comes at a price in life, as it cannot be everything fine and dandy. That’s just how nature works, and it’s also available in the case of hydroelectric energy. Therefore, let’s check out some of the cons:
- Land use and habitat loss
Hydroelectric projects may need large areas of land, which will lead to habitat loss for animals and plants. By creating reservoirs, communities can get displaced, and ecosystems can submerge.
- Upfront costs:
Building hydroelectric infrastructure, such as turbines and dams, will involve some substantial upfront costs. The construction of associated facilities, as well as of dams and turbines, can be both expensive and time-consuming.
- Sedimentation:
Sedimentation can accumulate in reservoirs over time, reducing their storage capacity. The efficiency of hydroelectric power generation could also be affected.
- Impact on the environment:
There’s no need to be the reincarnation of Einstein to realize that the construction of dams and reservoirs can pose significant impacts on the environment, including displacement of wildlife, altered river ecosystems, and changes in water quality.
- Social impact:
If you construct a dam in some areas, this could lead to the displacement of local communities and further impacting their traditional lifestyles. Social unrest may result, as we all know that people are quite sensitive when it comes to bringing anything too close to their backyard.
The prevalence of hydroelectric power may still continue to increase as the world’s countries invest in and develop other forms of renewable energy.
