Effective storage
459.9 10k m³
▼ -4.4 10k m³ (vs Yesterday)Real-time conditions and historical storage trends
Observed at: 09/18/2026 11:00Daily operation date: 09/17/2026 00:00
Source: Water Resources Agency Reservoir Conditions and Daily Reservoir Operations datasets
Storage ratioNormal Storage
84.5%
▼ -0.8% (vs Yesterday)▼ -0.8% (1 hr)
Effective storage: 459.9 10k m³ · Effective capacity: 544 10k m³
Real-time Hydraulic Briefing
Synthesized water storage and flow dynamicsCurrent water storage for 大埔水庫 is at 84.5% with a water level elevation of 69.17 m. Storage is down 0.8% compared to yesterday at the same time (falling 0.8% in the past hour); inflow and outflow are balanced (inflow 2.4 m³/s, outflow 1.6 m³/s) with steady water level. Primary water supply covers Emei (Hsinchu), Toufen, and Zhunan (Miaoli) agricultural farmlands.
大埔水庫 (ID: 10503) is an official On-stream Reservoir situated in the Emei Creek, Zhonggang River System, operated and managed by Irrigation Agency Miaoli Management Office. In operation since 1960, 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 459.9 (10k m³), with a storage ratio of 84.5% and a real-time water level elevation of 69.17 meters. Hydraulic flow metrics record an inflow of 2.4 m³/s against an outflow of 1.6 m³/s (net flow: +0.77 m³/s), indicating active reservoir refilling. Operational flood-control status is currently designated as "Regulated release".
Primary functional purposes include Hsinchu & Miaoli Irrigation, Flood Retention, Emei Lake Tourism, with key regional supply coverage extending across Emei (Hsinchu), Toufen, and Zhunan (Miaoli) agricultural farmlands.
Primary Supply Area:Emei (Hsinchu), Toufen, and Zhunan (Miaoli) agricultural farmlands
Hsinchu & Miaoli IrrigationFlood RetentionEmei Lake Tourism
Water level
69.17 m
▼ -0.04 m (vs Yesterday)Inflow
2.37 m³/s
▼ -0.09 m³/s (1 hr)Total outflow
1.6 m³/s
— 0.0 m³/s (1 hr)Effective capacity
544 10k m³
Net Flow Balance
大埔水庫 · Real-time hydrological balance and storage dispatch analysis
Inflow (Qin)
2.37 m³/sUpstream catchment runoff inflow rateTotal outflow (Qout)
1.6 m³/sGate release and flood desilting rateNet Flow Balance (ΔQ)
+0.77 m³/sInflow exceeds outflow; storage volume is increasing24 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
1.6 m³/s
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
大埔水庫 · Engineering profile and geospatial information
Managing AgencyIrrigation Agency Miaoli Management Office
Facility TypeOn-stream Reservoir
River SystemEmei Creek, Zhonggang River System
Effective capacity544 10k m³
Year Completed1960
Geographic Location
24.6783°N, 120.9856°E新竹縣 · 峨眉鄉
Related Reservoirs in Region
Check real-time conditions and historical trends for other facilities in the same region.
Frequently Asked Questions
大埔水庫 · 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.