Water draw
N/A
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
集集攔河堰
💡 Weir Characteristics: This is a run-of-river diversion weir rather than a deep storage reservoir. Storage varies drastically with daily river flows.
Facility Operation
101.57 m³/sCurrent Inflow Rate
Effective capacity: 713.8 10k m³ (Desilting & flood regulation) · Run-of-river facility · Primarily raises river level for diversion/water supply without storage ratio monitoring
Real-time Hydraulic Briefing
Synthesized water storage and flow dynamicsCurrent water storage for 集集攔河堰 is at 61.4% with a water level elevation of 213.1 m. Storage is down 2.2% compared to yesterday at the same time (falling 0.9% in the past hour); inflow (101.6 m³/s) exceeds outflow (14.2 m³/s), resulting in net storage gain. Primary water supply covers Changhua and Yunlin Plains for agriculture, municipal, and industrial users.
集集攔河堰 (ID: 20503) is an official Run-of-river Weir situated in the Zhuoshui River System, operated and managed by Central Region Water Resources Branch, WRA. In operation since 2001, 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 438.2 (10k m³), with a storage ratio of 61.4% and a real-time water level elevation of 213.1 meters. Hydraulic flow metrics record an inflow of 101.6 m³/s against an outflow of 14.2 m³/s (net flow: +87.4 m³/s), indicating active reservoir refilling.
Primary functional purposes include Changhua & Yunlin Agricultural Irrigation, Municipal & Industrial Water Intake, with key regional supply coverage extending across Changhua and Yunlin Plains for agriculture, municipal, and industrial users.
Primary Supply Area:Changhua and Yunlin Plains for agriculture, municipal, and industrial users
Changhua & Yunlin Agricultural IrrigationMunicipal & Industrial Water Intake
Water level
213.1 m
▼ -0.1 m (vs Yesterday)Inflow
101.57 m³/s
▼ -13.34 m³/s (1 hr)Total outflow
14.17 m³/s
▼ -0.06 m³/s (1 hr)Catchment rainfall
0 mm
Net Flow Balance
集集攔河堰 · Real-time hydrological balance and storage dispatch analysis
Inflow (Qin)
101.57 m³/sUpstream catchment runoff inflow rateTotal outflow (Qout)
14.17 m³/sGate release and flood desilting rateNet Flow Balance (ΔQ)
+87.4 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
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
Hydrological Flow & Water Level History
Historical telemetry trends for inflow, outflow discharge, and live water level elevation.
Reservoir Specifications · Geographic Location
集集攔河堰 · Engineering profile and geospatial information
Managing AgencyCentral Region Water Resources Branch, WRA
Facility TypeRun-of-river Weir
River SystemZhuoshui River System
Effective capacity713.8 10k m³
Year Completed2001
Geographic Location
23.8267°N, 120.7578°E南投縣 · 集集鎮
Related Reservoirs in Region
Check real-time conditions and historical trends for other facilities in the same region.
Frequently Asked Questions
集集攔河堰 · Key insights into reservoir metrics, release mechanisms, and facility operations
FAQ
💡 Weir Characteristics: This is a run-of-river diversion weir rather than a deep storage reservoir. Storage varies drastically with daily river flows.