Mongolia Reservoir Transparency

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 publicly accessible current storage volume data was found for any Mongolian reservoir or dam. NAMEM (namem.gov.mn) provides real-time flood risk alerts and meteorological forecasts but does not publish reservoir fill levels or storage volumes. The Water Authority portal (water.gov.mn) references an ewater.mn unified water information system, but that portal displays 'no information available' in its services section as of 2026. Mongolia's two main hydropower reservoirs (Taishir on the Zavkhan Gol, ~1 km³ capacity; Durgun on the Khovd, 12 MW) have no public real-time or near-real-time storage data. Ulaanbaatar's water supply infrastructure (groundwater-dominated, 82% of national use) has a tiered-access groundwater dashboard developed with World Bank support, but reservoir surface water storage is absent from it. The ADB and OECD both flag data gaps in Mongolia's water information systems as a key governance challenge.

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: Mongolia's open data portal (opendata.mn / opendata.gov.mn) offers a REST API and CSV/Excel downloads for government datasets generally, but no water storage or reservoir datasets were discoverable through that system. NAMEM's website has no API or machine-readable hydrology downloads listed. The Information and Research Institute of Meteorology, Hydrology and Environment (irimhe.namem.gov.mn) lists a 'Nature and Environment Information Database' and a 'Climate Service System' but content is entirely in Mongolian and no hydrology API documentation is publicly available. The ewater.mn unified water information system, run by the Water Authority, appears operational but without public data endpoints. No registration-free structured access to reservoir data was identified from any agency.

v1.3.0 capacity-weighted: coverage = round(100 × covered_capacity_hm³ / total_national_capacity_hm³). Mongolia's total reservoir capacity above 10 hm³ is approximately 1,000 Mm³, dominated by Taishir (~1,000 Mm³ on the Zavkhan Gol, 11 MW, commissioned 2008) with possibly Durgun (12 MW on the Khovd) contributing a smaller amount. Other facilities (Shariin Gol ~0.25 Mm³; ~11 small seasonal stations) are well below threshold. The Blue Horse programme's 33+ planned multipurpose dams are not yet operational. No government source publishes storage levels for Taishir or Durgun. Covered capacity = 0 Mm³. Coverage = round(100 × 0 / 1,000) = 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: Mongolia maintains Annual Hydrological Yearbooks dating to 1945, managed by NAMEM's IRIMHE division, covering river gauging stations (142 river stations and 18 lake stations as of recent counts). However, these yearbooks are not publicly downloadable in machine-readable formats — they exist as internal institutional records or physical publications. A Zenodo dataset (2026) publishes monthly runoff data from 30 western Mongolia stations since 2000, representing a rare open academic release but not government-operated. The Mongolian Plateau Lake Dataset (1990–2020) provides open-access lake extent data. No government portal offers machine-readable historical reservoir storage time series. River flow records exist institutionally since 1945, but public machine-readable access is not established.

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 update schedule for reservoir or water storage data was identified. NAMEM publishes real-time flood risk warnings during hazard events and daily meteorological forecasts, but these are operational alerts, not structured storage-level publications. The groundwater monitoring dashboard (World Bank-supported) provides some near-real-time groundwater data to registered basin-authority users, but the public tier receives anonymized, infrequently updated summaries. No evidence of weekly, monthly, or even annual public reservoir storage publications from any Mongolian government agency was found.

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: NAMEM's mandate includes 'unified methodology' for hydrological monitoring, and Mongolia's systematic water quality and flow monitoring dates to the 1940s with established WMO-aligned practices. The agency lists laws and regulations on its website including national monitoring programme frameworks. However, no specific measurement methodology documentation for reservoir storage monitoring is publicly available in English or easily navigable Mongolian. The OECD 2025 report confirms that methodological transparency and data management modernisation are among the key gaps identified in Mongolia's water sector. Mongolia's participation in WMO programmes implies some adherence to international standards, which partially supports this dimension.

NAMEM operates a partial English-language homepage (namem.gov.mn/en/home) with an overview of its mandate, news, and international cooperation sections, representing a meaningful effort at English accessibility. The Water Authority (water.gov.mn) and the ewater.mn portal are exclusively in Mongolian. The open data portal (opendata.mn) is Mongolian-only. ADB, OECD, and World Bank reports on Mongolia's water sector are available in English but originate from international bodies rather than national government publication. English-language government content exists at the overview level for NAMEM but provides no access to data.