Guangxi Xiafu Hydro Power Project

Audit Analysis

The Guangxi Xiafu Hydro Power Project is a straightforward 49.5 MW small-hydro CDM project using the well-established ACM0002 methodology, with VVB-confirmed investment additionality and a standard jurisdictional grid-emission-factor baseline. However, five cross-document contradictions—including discrepant ERR figures, conflicting additionality test descriptions, and inconsistent baseline characterisations—introduce meaningful data-reliability uncertainty. The 2005 grid emission factor, while appropriate at registration, has not been shown to have been updated, and the absence of a buffer pool (though not critical for hydro) and several unresolved procedural corrective actions temper confidence.

Project Description

Red Flags

• ⚠Five contradictions across documents, including two different claimed ERR values (97,154 vs 135,953) from monitoring reports only two months apart, and the VVB-verified figure (116,905) exceeding the later claimed value by ~20%
• ⚠Grid emission factor of 0.8325 tCO₂/MWh is from 2005; no evidence of periodic update is found in the extracted record, raising the risk of overstated reductions as China's grid has decarbonised
• ⚠Additionality test type is described as 'investment' in the 2012 monitoring report but 'combined' in the 2008 validation report, creating ambiguity about the actual test applied
• ⚠Baseline method is characterised as 'jurisdictional' in the 2012 report but 'project' in the 2010 report, undermining clarity on the baseline approach

Credit Vintages