Effective storage
12,319.1 10k m³
▲ +160.3 10k m³ (vs Yesterday)Real-time conditions and historical storage trends
Observed at: 09/18/2026 12:00Daily operation date: 09/17/2026 00:00
Source: Water Resources Agency Reservoir Conditions and Daily Reservoir Operations datasets
💡 Operational Notes & FAQ
日月潭水庫
Functions as a massive water battery: water is released downstream during peak hours and pumped back overnight during off-peak hours.
Storage ratioNormal Storage
95.9%
▲ +1.3% (vs Yesterday)— 0.0% (1 hr)
Effective storage: 12,319.1 10k m³ · Effective capacity: 12,846.1 10k m³
Real-time Hydraulic Briefing
Synthesized water storage and flow dynamicsCurrent water storage for 日月潭水庫 is at 95.9% with a water level elevation of 747.7 m. Storage is up 1.3% compared to yesterday at the same time. Primary water supply covers Daguan and Mingtan Pumped-Storage Power Plants & downstream irrigation.
日月潭水庫 (ID: 20502) is an official Off-stream Reservoir situated in the Zhuoshui River System Diversion, operated and managed by Taiwan Power Company. In operation since 1934, this facility serves as a vital strategic pillar in Taiwan's regional water grid and flood mitigation network.
According to the latest observation, its effective water storage is approximately 12,319.1 (10k m³), with a storage ratio of 95.9% and a real-time water level elevation of 747.7 meters.
Primary functional purposes include Pumped-storage & Hydroelectric Power, Tourism, Downstream Irrigation, with key regional supply coverage extending across Daguan and Mingtan Pumped-Storage Power Plants & downstream irrigation.
Primary Supply Area:Daguan and Mingtan Pumped-Storage Power Plants & downstream irrigation
Pumped-storage & Hydroelectric PowerTourismDownstream Irrigation
Water level
747.7 m
▲ +0.2 m (vs Yesterday)Inflow
N/A
Total outflow
N/A
Effective capacity
12,846.1 10k m³
Net Flow Balance
日月潭水庫 · Real-time hydrological balance and storage dispatch analysis
Inflow (Qin)
N/AUpstream catchment runoff inflow rateTotal outflow (Qout)
N/AGate release and flood desilting rateNet Flow Balance (ΔQ)
N/AOfficial real-time inflow/outflow telemetry unavailable24 小時水文吞吐平衡走勢
雙向對稱流量觀測（上方為上游入流，下方為大壩放流，穿梭折線為淨出入差額）Discharge Gates & Facilities
Real-time telemetry for spillways, drainage tunnels, desilting tunnels, and power outlets.
Spillway outflowMain spillway gate release or crest free overflow
24h 待命常閉
Power outletHydroelectric turbine power generation discharge
24h 待命常閉
Desilting tunnelBottom desilting and sediment bypass tunnel
24h 待命常閉
Drainage tunnelDedicated flood diversion tunnel release
24h 待命常閉
Water drawMunicipal water, industrial, or irrigation draw
24h 待命常閉
Other outflowEcological baseflow or auxiliary facility release
24h 待命常閉
Historical Storage Trends
View historical storage percentage and water volume trends over time.
Reservoir Specifications · Geographic Location
日月潭水庫 · Engineering profile and geospatial information
Managing AgencyTaiwan Power Company
Facility TypeOff-stream Reservoir
River SystemZhuoshui River System Diversion
Effective capacity12,846.1 10k m³
Year Completed1934
Geographic Location
23.8569°N, 120.9161°E南投縣 · 魚池鄉
Related Reservoirs in Region
Check real-time conditions and historical trends for other facilities in the same region.
Frequently Asked Questions
日月潭水庫 · Key insights into reservoir metrics, release mechanisms, and facility operations
FAQ
Functions as a massive water battery: water is released downstream during peak hours and pumped back overnight during off-peak hours.