A Review of Greenhouse Gas Emissions by Hydropower Reservoirs

Hydroelectric reservoirs have environmental impacts as many other sources of energy. Regarding hydropower, these effects include flooding cultivated and forest areas, changes in water quality, negative on biodiversity, conflict with indigenous people fish migration. In the nineties, researchers put evidence another important impact dam construction: greenhouse gases generated by organic matter reservoir flooding. Scientists argue that like natural human bodies, hydropower emit biogenic into atmosphere. The diffusive gas flux is associated difference between partial pressure each chemical substance considering aquatic system Ebullition a process where some substances are not soluble bubbles formed sediment at bottom reservoir. often dominant pathway CH4 released from ecosystems. phenomenon episodic irregular depends mainly hydrostatic physical influences, such currents, temperature gradients bathymetry body. At reservoirs, pathways for emanation to atmosphere degassing passing through turbines powerhouse diffusion across river downstream dam. This paper gives review state-of-the-art advances research emissions removals reservoirs.