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← Reservoir Transparency Index H1 2026

H1 2026 Evaluation

Madagascar Reservoir Transparency

F2

Opaque — Ranked #144 out of 167 countries

Coverage0

weight 30%

Data Availability0

weight 20%

Technical Accessibility0

weight 15%

Historical Depth0

weight 13%

Update Frequency0

weight 10%

Methodological Transparency0

weight 8%

Language and Usability35

weight 5%

Primary source evaluated

JIRAMA — Jiro sy Rano Malagasy (electricity and water utility)

https://winrock.org/resources/madagascar-water-resources-profile/
✗ No API

Dimension breakdown

Data Availability

20% of total score

0

Coverage is 0 (no national reservoirs >10 hm³ with public data). Quality dimensions for the COVERED subset are therefore 0 by definition. Original notes preserved below: Madagascar has several operational hydropower reservoirs. JIRAMA (Jiro sy Rano Malagasy), the state electricity and water utility, operates Mandraka (24 MW, built 1956–1972), Andekaleka (91 MW total, expanded 2012), and Sahanivo among others. The World Bank's ESMAP small-hydro mapping (2017) documented Madagascar's hydropower potential extensively. JIRAMA holds operational data on water production but publishes no reservoir-level or storage-volume data on a public portal. No national hydrological data portal exists. The IWRM survey and GWP documentation confirm data availability is internally held but not open.

Technical Accessibility

15% of total score

0

Coverage is 0 (no national reservoirs >10 hm³ with public data). Quality dimensions for the COVERED subset are therefore 0 by definition. Original notes preserved below: No API, machine-readable dataset, or downloadable reservoir data is published by JIRAMA or any Malagasy government body. The IWMI Africa Geoportal hosts some stream data for Madagascar in GIS formats, but this concerns river networks rather than reservoir storage levels. World Bank and ESMAP project data is available in PDF reports but not as operational time series.

Coverage

30% of total score

0

Capacity-weighted (v1.3.0): 0/1,000 Mm³ = 0% (Mandraka + Andekaleka run-of-river + Tsiazompaniry; JIRAMA publishes no operational storage data). Prior justification (preserved for context): Methodology denominator counts reservoirs with capacity >10 hm³. Madagascar has approximately 5–10 such reservoirs, including Tsiazompaniry (260 Mm³, the largest), Mantasoa, Andekaleka, and Sahanivo. FAO and World Bank inventories indicate the 13 largest Malagasy reservoirs collectively hold ~493 Mm³, of which several individually exceed 10 hm³. None are covered by any public monitoring publication: JIRAMA holds operational data internally but publishes nothing reservoir-specific. Coverage = round(100 × 0 / ~7) = 0.

Historical Depth

13% of total score

0

Coverage is 0 (no national reservoirs >10 hm³ with public data). Quality dimensions for the COVERED subset are therefore 0 by definition. Original notes preserved below: Some historical engineering data for Mandraka (constructed 1956–1972) and Andekaleka exists in World Bank and ESMAP project documents, but these are project-specific snapshots rather than continuous operational time series. No national archive of reservoir-level historical data is publicly accessible from Malagasy government sources.

Update Frequency

10% of total score

0

Coverage is 0 (no national reservoirs >10 hm³ with public data). Quality dimensions for the COVERED subset are therefore 0 by definition. Original notes preserved below: No regular public publication cycle for reservoir data exists. JIRAMA's operational data is internal and service-oriented. No periodic hydrological bulletin is published at national level.

Methodological Transparency

8% of total score

0

Coverage is 0 (no national reservoirs >10 hm³ with public data). Quality dimensions for the COVERED subset are therefore 0 by definition. Original notes preserved below: No published measurement methodology or monitoring standards for reservoir levels exist from JIRAMA or government sources. The World Bank ESMAP small-hydro mapping employed transparent international methodology, but this was a one-time external assessment rather than an ongoing national monitoring framework.

Language and Usability

5% of total score

35

French is a co-official language of Madagascar (alongside Malagasy) and the primary language of government administration and JIRAMA documentation. French is internationally accessible and would present no significant barrier for a large portion of the global research community. However, some JIRAMA and government communications are in Malagasy only. The mixed language environment earns a moderate score.

Evaluator notes

Madagascar is a country with genuine hydropower potential — the ESMAP/World Bank small-hydro mapping identified hundreds of potential sites across its river network — yet the operational transparency of its existing reservoirs is essentially zero. JIRAMA, the state electricity and water utility, is chronically underfunded and suffers frequent operational crises including load shedding and service interruptions in Antananarivo. The utility does hold operational data for its reservoirs, but the institutional capacity and mandate to publish this data publicly do not exist. The country's data gap is compounded by the absence of a national groundwater monitoring system and the limited reach of the hydrometric network. Academic institutions (RIIP, Pasteur Institute Madagascar) contribute to some hydrological monitoring but focused on disease-relevant water quality rather than reservoir storage. The IWMI Africa Geoportal and BGS Earthwise provide some spatial hydrological context, but operational reservoir monitoring by Madagascar as a sovereign publication is absent. The moderate language-usability score reflects the French co-official language environment, which would facilitate data accessibility if JIRAMA were ever mandated and resourced to publish reservoir-level data.

Evaluated by Jaime Delgado · 2026-09-15 · Methodology v1.3.0

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