Dominican Republic Reservoir Transparency

INDRHI publishes current storage data for the 10 main national reservoirs (Tavera, Bao, Monción, Rincón, Hatillo, Jigüey, Valdesia, Sabana Yegua, Sabaneta, Montegrande) as HTML press releases, typically including volume in MMC and fill percentage. Multiple updates confirmed in 2025–2026. EGEHID independently reports dam levels on egehid.gob.do under 'Niveles de presas y embalses'. However, data is only available as narrative news text — there is no structured data portal, downloadable table, or dashboard. Users cannot query current storage without parsing individual news articles.

No public REST API found for either INDRHI or EGEHID. Reservoir data is embedded within HTML news articles as unstructured narrative text — not in tables, CSV files, or any machine-readable format. EGEHID has published a monthly average reservoir level dataset on the national open data portal (datos.gob.do), but the portal itself returned HTTP 473 errors during evaluation and the dataset's format and download availability could not be confirmed independently. No registration-free API endpoint or structured data feed was identified from either agency.

Conservative estimate — denominator includes private smaller hydropower operational storage (multiple small private/IPP hydropower plants in the country with operational storage not in EGEHID publication), smaller irrigation and drinking-water reservoirs managed by INAPA and CAASD outside the INDRHI/EGEHID press-release cycle, and agricultural impoundments. Methodology v1.3.0 (capacity-weighted). Covered capacity through INDRHI and EGEHID periodic publications for 10 strategic reservoirs is approximately 1,800 hm³. A realistic national denominator including private hydro tail, INAPA/CAASD smaller reservoirs and agricultural storage reaches approximately 2,120 hm³. Score = round(100 × 1,800 / 2,120) = 85. The 10 covered reservoirs account for essentially all of INDRHI's tracked national capacity; the conservative discount reflects the private hydro and INAPA/CAASD tail.

No machine-readable historical time series is publicly downloadable from INDRHI or EGEHID. INDRHI's news archive contains scattered press releases from 2023 onwards, but these are narrative texts rather than structured time series. EGEHID's dataset on datos.gob.do is described as covering 2024–2025 only. INDRHI operates hydrometric stations dating to 1966 and has shared precipitation data with academic repositories (HydroShare, 2018), but no long-running reservoir storage series is openly accessible online without direct contact with the agency.

INDRHI issues press releases with reservoir storage snapshots irregularly — typically triggered by notable weather events (tropical waves, hurricanes, seasonal droughts) rather than on a fixed schedule. Multiple updates were confirmed in April–May 2026, but there is no evidence of a regular weekly or daily publication cadence on a structured channel. The Observatorio del Agua (inter-institutional body including INDRHI, EGEHID, ONAMET, CAASD, INAPA) holds weekly meetings but does not appear to publish a corresponding weekly public bulletin. COPRE also issues situational releases without a fixed frequency.

INDRHI reports consistently express reservoir levels in two complementary units — meters above sea level (msnm) and volume in million cubic meters (MMC) — which implies use of elevation-volume rating curves, but no methodology document describing gauge types, calibration procedures, or how elevation is converted to storage volume is publicly accessible. The INDRHI Documents page offers three planning documents (Plan Hidrológico Nacional, Demandas de Aguas, Atlas de Recursos Hídricos) but none addresses measurement methodology for real-time reservoir monitoring. COPRE membership (INDRHI, EGEHID, Ministry of Agriculture, Ministry of Defense, INAPA, Civil Defense) is disclosed in press releases, providing some institutional transparency.

All content on indrhi.gob.do and egehid.gob.do is exclusively in Spanish. No English-language interface, translation, or summary is provided by either agency. The datos.gob.do open data portal is also Spanish-only. Press releases and data outputs are entirely in Spanish, with no automated translation or bilingual documentation. International researchers or non-Spanish-speaking users face a complete language barrier.