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G-res Tool

UNESCO Chair in Global Environmental Change  

When a reservoir is created, greenhouse gases may be released over time due to the decomposition of organic material in the flooded area. In other conditions, a reservoir may act as carbon sink: absorbing more emissions than it emits. Up until now, however, accurately assessing reservoir emissions has required large-scale and costly multi-year studies.

The GHG Reservoir (G-res) Tool, launched in 2017, allows companies, investors and consultants to report on the carbon footprint of a reservoir. Using readily available input data, the tool provides a cost effective way to more accurately assess net greenhouse gas (GHG) emissions.

The tool was developed by the International Hydropower Association (IHA) in collaboration with the UNESCO Chair for Global Environmental Change.

Assessing the net GHG emissions of a reservoir is now an expectation for sustainability reporting and a requirement for financing a hydropower project through climate finance.

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