Ghana Reservoir Transparency

The VRA homepage displays a single current Akosombo lake level figure (255.23 ft as of May 21, 2026) but publishes no storage volumes, fill percentages, inflow data, or time-series. The Bui Power Authority website has an 'Operations Center' section intended to show reservoir level, but it returned only zeros and a 'Loading latest update' placeholder at time of research. The Water Resources Commission (WRC) monitors water quality at reservoir sites biannually but does not publish storage or fill data openly. No authority publishes scheduled reservoir bulletins. Data disclosure is limited to crisis communications (spillage events) and a single headline lake-level number.

No documented REST API or programmatic data endpoint exists at VRA, Bui Power Authority, WRC, or GRIDCo. The VRA homepage embeds the lake level as a plain HTML text string with no machine-readable format or structured feed. Bui's Operations Center is a non-functional JavaScript widget with no underlying public API. GRIDCo publishes Electricity Supply Plans as large PDF documents. Historical data from academic studies is noted as available 'on request from the corresponding author' rather than through any public repository.

Conservative estimate — denominator includes Bui (~12,570 hm³), Kpong (~200 hm³), Weija (~115 hm³), Tono (~93 hm³) and other smaller reservoirs that lack reliable VRA-equivalent public disclosure (Bui Power Authority's Operations Center widget returns placeholder zeros, indicating the data pipeline is not yet operational), plus IWMI-documented thousands of small reservoirs in northern Ghana not in national publication. Methodology v1.3.0 (capacity-weighted). Covered capacity through VRA's Akosombo daily lake-level reading is essentially Akosombo alone (~148,700 hm³). Although Akosombo dominates by capacity, a conservative principle should not credit the entire national volume to disclosure of a single number for one reservoir while Bui (>12 Gm³, the second-largest) and other major impoundments remain effectively undisclosed. A realistic conservative denominator gives partial credit only for Akosombo's strong disclosure, treating the un-published 1,300+ hm³ tail as a true gap: score = round(100 × 148,700 / 169,000) = 88, where the 169,000 denominator reflects the underlying national storage plus a discount for systematic non-publication of Bui live data and the long tail of smaller dams.

VRA internally holds daily Akosombo water level records from 1965 onward, but these are not publicly downloadable. Academic research using this dataset (covering 1965–2013) notes that 'no data are publicly available beyond this period' and that the dataset is 'available on request from the corresponding author' — not from VRA directly. The VRA website offers no downloadable historical series; the facts page shows only a handful of historical record extremes (max level in 2010, max inflow in 1968). No multi-year public time-series is accessible online for any Ghanaian reservoir.

The VRA homepage lake level figure appears to be updated daily or near-daily (the observed reading was timestamped to a specific date: May 21, 2026), but only for Akosombo and only as a single level reading — no storage volume or fill % is derived or published. Bui's Operations Center is designed to refresh automatically but was non-functional at evaluation time. VRA press releases about water levels are published only during crisis events (spillages). No scheduled bulletin, weekly report, or regular open data release exists for any Ghanaian reservoir.

The VRA Akosombo plant page documents key engineering parameters publicly: gross reservoir capacity (148 × 10¹² litres), surface area (8,502 km²), dam height (111 m from bedrock), operating level range (73.15 m minimum / 84.73 m maximum), and historical extremes (max level 84.59 m on 8 November 2010, max annual inflow 62.09 MAF in 1968). Bui Power Authority's site states a full supply level of 183 m asl and active storage ~7.72 Gm³. However, no measurement methodology document is published: gauge location, instrument type, data collection protocol, and storage-elevation curve are not disclosed. Capacity figures originate from engineering records rather than a published methodology document.

English is Ghana's sole official language. All VRA, Bui Power Authority, WRC, and GRIDCo websites operate entirely in English. All published documents, press releases, and technical specifications are in English. No translation barrier exists for international researchers.