Effective storage
6,801 10k m³
▼ -203 10k m³ (1 hr)Real-time conditions and historical storage trends
Observed at: 09/18/2026 07:00Daily operation date: 09/17/2026 07:00
Source: Water Resources Agency Reservoir Conditions and Daily Reservoir Operations datasets
Storage ratioNormal Storage
86.3%
▼ -2.6% (1 hr)
Effective storage: 6,801 10k m³ · Effective capacity: 7,885.2 10k m³
Real-time Hydraulic Briefing
Synthesized water storage and flow dynamicsCurrent water storage for 烏山頭水庫 is at 86.3% with a water level elevation of 57.06 m. (falling 2.6% in the past hour) Primary water supply covers Chianan Plain farms and Tainan metropolitan water supply.
烏山頭水庫 (ID: 30501) is an official Off-stream Reservoir situated in the Guantian Creek, Zengwen River System, operated and managed by Irrigation Agency Chianan Management Office. In operation since 1930, 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 6,801 (10k m³), with a storage ratio of 86.3% and a real-time water level elevation of 57.06 meters.
Primary functional purposes include Chianan Canal Irrigation, Tainan Municipal & Industrial Water Supply, with key regional supply coverage extending across Chianan Plain farms and Tainan metropolitan water supply.
Primary Supply Area:Chianan Plain farms and Tainan metropolitan water supply
Chianan Canal IrrigationTainan Municipal & Industrial Water Supply
Water level
57.06 m
▼ -0.22 m (1 hr)Inflow
N/A
Total outflow
N/A
Effective capacity
7,885.2 10k m³
Net Flow Balance
烏山頭水庫 · 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
N/A
Other outflowEcological baseflow or auxiliary facility release
N/A
Historical Storage Trends
View historical storage percentage and water volume trends over time.
Reservoir Specifications · Geographic Location
烏山頭水庫 · Engineering profile and geospatial information
Managing AgencyIrrigation Agency Chianan Management Office
Facility TypeOff-stream Reservoir
River SystemGuantian Creek, Zengwen River System
Effective capacity7,885.2 10k m³
Year Completed1930
Geographic Location
23.2003°N, 120.3667°E台南市 · 官田區
Related Reservoirs in Region
Check real-time conditions and historical trends for other facilities in the same region.
Frequently Asked Questions
烏山頭水庫 · Key insights into reservoir metrics, release mechanisms, and facility operations
FAQ
Total capacity is the total physical volume of the reservoir basin.
In contrast, effective storage refers to the usable volume available for public, agricultural, or power supply above dead storage and sediment levels.