Morocco Reservoir Transparency

For the COVERED subset (~50 major dams in the daily MEM/ADA bulletin), the Ministry of Equipment and Water (DRPE) publishes daily national fill rates and storage volumes (Mm³) via the official bulletin and maadialna.ma. Dam-level data (volume stored, fill %, inflows) is reported. The MORDAM application consolidates daily monitoring. Basin agencies (ABHBC, ABHSM, ABHSEBOU, ABHT, ABHDON) publish supplementary basin-level situation sheets. The typical covered reservoir (e.g., Al Wahda 3,780 Mm³ 88.76% fill May 2026, Bin El Ouidane 1,384 Mm³ 93.83% fill, Mohammed V 86%) has daily publication. Score is not higher because some basin-agency portals are inconsistently maintained.

For the COVERED subset, Morocco operates a CKAN-based open data portal (data.gov.ma) hosting the 'Situation journalière des principaux grands barrages' dataset with a documented CKAN REST API and API guide (data.gov.ma/fr/guide-api). However, real-world usability is limited: the dataset has been flagged as incomplete or intermittently updated, and MORDAM is an internal ministry tool not exposing a public API. Primary public delivery remains the maadialna.ma website (HTML dashboards) plus PDFs. Basin agency portals (abhbc.com/fr/situation_des_barrages, abhsm.ma) publish HTML tables without documented APIs.

Conservative estimate — denominator includes the long tail of small-and-medium irrigation dams not in the DRPE daily bulletin (Morocco's broader inventory includes ~140 dams >10 hm³ with only ~50 in the public daily bulletin), small private irrigation reservoirs, and substantial siltation-driven capacity uncertainty (~75 MCM/year siltation rate documented but not consistently incorporated into official figures). Methodology v1.3.0 (capacity-weighted). Covered capacity through the MEM/ADA daily bulletin and basin agency tables is approximately 15,500 hm³. A realistic national denominator including small-medium irrigation dams and a conservative provision for siltation uncertainty reaches approximately 18,200 hm³. Score = round(100 × 15,500 / 18,200) = 85. The covered ~50 dams contain virtually all strategic storage (Al Wahda alone is ~22% of national capacity); the conservative discount reflects the long tail of smaller irrigation dams and the documented siltation gap.

MEDIAN historical depth across the ~50 covered dams is approximately 5-8 years of publicly accessible machine-readable data. The maadialna.ma platform appears to serve data from approximately 2018 onward. DRPE internally tracks rainfall and dam inflow back to 1945 and dam storage capacity evolution from 1960, but these long internal records are not served through a live public portal. The Scribd-hosted situation bulletins show that individual sheets exist historically but are not aggregated into a queryable open archive. Band: median 5-10 years.

For the COVERED subset, the typical cadence is DAILY. DRPE publishes a daily national dam situation ('point journalier sur la situation des barrages') disseminated through the ministry website, maadialna.ma, and relayed by Maroc.ma and media. The MORDAM application provides daily consolidated updates. Individual dam fill rates and aggregate storage are updated every 24 hours (e.g., 'as of May 26, 2026, dams stand at ~76%'). Daily cadence is one of the strongest aspects of Morocco's transparency infrastructure. Score reduced slightly because the data.gov.ma dataset lags the ministry's internal daily refresh and some basin sites update weekly.

For the COVERED subset, Morocco's Law 36-15 on Water establishes the institutional and legal framework, and agency mandates are publicly documented. Published bulletins include dam name, basin, design capacity (Mm³), current stored volume (Mm³), and fill percentage. However, detailed measurement methodology is sparse: how reservoir volumes are measured, how often capacity figures are revised for siltation (~75 MCM/year deposition), and how fill percentages are defined (total vs usable) are not formally described in accessible public documents. The siltation problem is acknowledged in academic literature but is not systematically incorporated into official capacity figures, creating a known methodological gap. ONEE does not separately publish hydroelectric reservoir storage data.

Morocco's primary data infrastructure — equipement.gov.ma, maadialna.ma, data.gov.ma, and all 10 basin-agency portals — operates exclusively in French and Arabic. No English-language interface or dataset documentation is provided by official sources. English-language access is limited to (a) Maroc.ma's bilingual government news portal, (b) secondary reporting by Morocco World News, Hespress English, and North Africa Post, and (c) international platforms (World Bank, FAO AQUASTAT, Water Diplomat). None constitute direct English-language access to structured datasets. The CKAN API guide on data.gov.ma is French-only.