The main ecological changes caused by the construction of pumped hydroelectric storage (PHS) facilities are primarily related to alterations of local ecosystems due to the building of reservoirs and dams. These changes include:
- Alteration of water flow: The construction of dams and reservoirs significantly modifies the natural flow of rivers or streams. This can disrupt aquatic ecosystems by changing sediment transport, water temperature, and flow regimes, which are critical for fish and other aquatic species.
- Impact on wildlife habitats: Reservoir creation can flood terrestrial habitats, displacing or destroying local flora and fauna. Changes in water levels and flow can also affect downstream habitats, potentially harming species dependent on specific aquatic or riparian conditions.
- Risks during construction: The building phase may require river diversion, which can cause temporary but significant ecological disturbances. Additionally, construction activities carry risks of major flooding and erosion that affect surrounding environments.
- Water sourcing and rights complications: In closed-loop PHS systems, sourcing water may lead to delays and disputes over water rights, potentially putting additional stress on aquatic resources.
- Greenhouse gas emissions: While PHS generally has low life cycle greenhouse gas emissions compared to other energy storage technologies, reservoirs can contribute to emissions under certain conditions, particularly from decomposing organic matter submerged during reservoir creation.
In summary, while pumped hydroelectric storage is a very low-carbon and renewable energy storage solution, its ecological impacts stem from physical alterations to landscapes and water systems, affecting water flow, aquatic and terrestrial habitats, and occasionally contributing localized greenhouse gas emissions.
Original article by NenPower, If reposted, please credit the source: https://nenpower.com/blog/what-are-the-main-ecological-changes-caused-by-the-construction-of-pumped-hydroelectric-storage-facilities/
