Czechia · Vltava → Elbe

Orlík

Hydropower · strategic storage · flood and flow regulation

Live reservoir intelligencePovodí Vltavy49.6062, 14.1822

Drought operation · 4 September 2026 Povodí Vltavy announced that Slapy storage began supporting downstream flows as Orlík reduced releases toward its inflow. The reported downstream target at Vrané is 40 m³/s. This dated operating announcement is separate from the latest instantaneous readings below. Dated report · ČTK / iDNES

Current conditions

Loading official and satellite reservoir feeds…Inflow · Operating state · Outflow

Inflow

Operating state

Outflow

Capacity

Measured record · no interpolation

History, not just a snapshot

Exact timestamps are shown in the reservoir’s local time. The national archive supplies monthly level, stored volume and flooded surface; the operator record supplies the higher-frequency flow trail. Lines connect published points for readability-no intermediate measurements are invented.

Loading official and satellite reservoir feeds…Water level · Stored volume

Published design spaces

River km 144.650 · cascade 5 of 9

Permanent pool280 mil. m³

Usable storage space374.428 mil. m³

Flood reserve62.072 mil. m³

Total design volume716.5 mil. m³

Global Dam Watch · reviewed join

Dam and catchment reference

3: Fair

Dam / barrierOrlik

Completed1963

Dam height91 m

Dam length450 m

Reference capacity716.5 mil. m³

Reference surface15.13 km²

Catchment12,025 km²

Elevation351 m a.s.l.

Long-term mean flow76.03 m³/s

Reference main useHydroelectricity

The mean flow is a WaterGAP/HydroSHEDS 1971-2000 model reference from Global Dam Watch, not today's inflow or release. Blank fields remain unfilled where no reviewed dam match exists.

Sources

Field-level provenance

Monthly observations · annual publication

ISVS Voda - official reservoir history

Monthly water level, stored volume and inundated area from the national archive.

The published archive currently begins in 2016; it does not contain historical inflow or outflow.

Fixed technical reference

Povodí Vltavy - strategic operation study

River kilometre and the permanent, storage, flood and total design spaces.

Design spaces describe the approved reservoir geometry, not today's stored volume.

Typically 10 minutes to hourly

Povodí Vltavy - live reservoir overview

Current level, total volume, inflow and outflow where the operator publishes them.

Operator values are published without validation and can be temporarily unavailable.

Typically hourly

Povodí Vltavy - storage and flood-space table

Filled and free usable storage plus available flood-retention space.

Not every work publishes every pool; a dash is missing data, never zero.

ISVS Voda national reservoir register

Official reservoir identity and mapped coordinates, except Kořensko's documented fallback.

Coordinates locate the registered reservoir feature and need not be the dam crest itself.

Fixed global reference · GDW v1

Global Dam Watch - barrier 1353

Dam dimensions, reservoir area and capacity, catchment, elevation, completion year and long-term mean river discharge.

Quality fair. Discharge is the modelled 1971-2000 mean, not a current operator reading. Field definitions: https://jeodpp.jrc.ec.europa.eu/ftp/public/JRC-OpenData/GDW/GDW_TechDoc_v1_delta.pdf

Per usable satellite observation; can lag weeks

Global Water Watch

Satellite-observed surface-water area for Global Water Watch reservoir 86465.

Surface area is not stored volume, fill percentage, gate state or dam safety.