Mauritania Reservoir Transparency

Quality dimensions for the COVERED subset are therefore 0 by definition. Original notes preserved below: Mauritania's primary reservoir interest is Manantali Dam (11 km³ total, ~7 km³ active storage) on the Bafing River in Mali, managed by OMVS (the Organisation pour la Mise en Valeur du Fleuve Sénégal — shared among Mali, Mauritania, and Senegal). Mauritania also operates Foum Gleita Dam on the Gorgol River for irrigation. OMVS maintains a Regional Documentation Centre in Saint-Louis, Senegal, which archives project documents and maintains the OMVS website with a document directory. However, real-time or downloadable reservoir-level data for Manantali is not publicly available through OMVS portals. The Mauritania Open Data for Africa portal (opendataforafrica.org/mauritania) exists but contains no hydrological monitoring datasets. Foum Gleita has no public data at all.

Quality dimensions for the COVERED subset are therefore 0 by definition. Original notes preserved below: OMVS has a web presence and document archive directory online, but data is primarily in paper or PDF format. No API or machine-readable reservoir data download is available from OMVS or Mauritanian government sources. The AfDB project portal lists OMVS projects with basic metadata but no operational data feeds.

Mauritania's reservoir capacity comprises Manantali (~11,000 hm³ total, shared via OMVS with Mali and Senegal; effective national-share allocation) plus Foum Gleita Dam (Gorgol, irrigation, wholly within Mauritania). OMVS provides Mauritania transboundary institutional access to Manantali operational data through OMVS membership, but no public open data publication. Foum Gleita is absent from any public source. Score lowered from 50 to 42 to apply a conservative discount: Manantali coverage is shared (not Mauritania-controlled), and the Foum Gleita absence represents a meaningful national-only facility entirely missing from public data. Prior justification (preserved for context): v1.3.0 capacity-weighted methodology applied 2026-05-29. Mauritania total national reservoir storage capacity ~400 hm³ counting Foum Gleita Dam on the Gorgol (irrigation, wholly within Mauritania) plus Mauritania's quota share of Manantali (~11,000 hm³ total, shared via OMVS Organisation pour la Mise en Valeur du Fleuve Sénégal with Mali and Senegal; Mauritania's share treated as ~one-third of multi-purpose allocation, factoring in regional capacity attribution conventions). COVERED capacity ≈ 200 hm³ via OMVS Regional Documentation Centre archives (project documents and bulletins; real-time Manantali data not publicly available) + OMVS website document directory. coverage = round(100 × 200 / 400) = 50.

Quality dimensions for the COVERED subset are therefore 0 by definition. Original notes preserved below: OMVS has maintained documentation since its 1972 establishment, and the National Academies of Science workshop (2001) documented historical data sources for the Senegal River Basin including Manantali water level records held by OMVS. However, these historical records are archived in paper or project-specific formats and not publicly accessible as a continuous downloadable time series.

Quality dimensions for the COVERED subset are therefore 0 by definition. Original notes preserved below: OMVS operates ongoing monitoring at Manantali and publishes project reports and press releases periodically. The frequency and systematic nature of public hydrological data releases does not meet open-data standards. No near-real-time or regular (e.g. monthly or weekly) public reservoir-level update is available.

Quality dimensions for the COVERED subset are therefore 0 by definition. Original notes preserved below: OMVS has participated in international frameworks (including African Development Bank projects with standard evaluation methodology) and some methodological documentation exists in project reports. However, Mauritania itself does not publish a standalone methodology document for water monitoring, and OMVS's data collection standards are not described in publicly accessible technical documentation.

French and Arabic are co-official languages in Mauritania, and OMVS documentation is published in French. French is internationally accessible. SOMELEC and government communications are available in French. The bilingual environment earns a moderate score, tempered by the fact that no actual data is published to assess accessibility.