Effective storage
2,386 10k m³
▲ +3 10k m³ (vs Yesterday)牡丹水庫
ID: 31201UnclassifiedOn-stream ReservoirReal-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
Storage ratioNormal Storage
91.6%
▲ +0.1% (vs Yesterday)— 0.0% (1 hr)
Effective storage: 2,386 10k m³ · Effective capacity: 2,603.7 10k m³
Real-time Hydraulic Briefing
Synthesized water storage and flow dynamicsCurrent water storage for 牡丹水庫 is at 91.6% with a water level elevation of 140.4 m. Storage is up 0.1% compared to yesterday at the same time; inflow and outflow are balanced (inflow 1.8 m³/s, outflow 1.2 m³/s) with steady water level. Primary water supply covers Hengchun Peninsula (Hengchun, Checheng, Manzhou, Mudan).
牡丹水庫 (ID: 31201) is an official On-stream Reservoir situated in the Rureng and Mudan Creeks, Sichong River System, operated and managed by Southern Region Water Resources Branch, WRA. In operation since 1995, 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 2,386 (10k m³), with a storage ratio of 91.6% and a real-time water level elevation of 140.4 meters. Hydraulic flow metrics record an inflow of 1.8 m³/s against an outflow of 1.2 m³/s (net flow: +0.63 m³/s), indicating active reservoir refilling.
Primary functional purposes include Hengchun Peninsula Municipal & Tourism Water, Maanshan Nuclear Plant Supply, with key regional supply coverage extending across Hengchun Peninsula (Hengchun, Checheng, Manzhou, Mudan).
Primary Supply Area:Hengchun Peninsula (Hengchun, Checheng, Manzhou, Mudan)
Hengchun Peninsula Municipal & Tourism WaterMaanshan Nuclear Plant Supply
Water level
140.4 m
▲ +0.02 m (vs Yesterday)Inflow
1.83 m³/s
▼ -2.3 m³/s (1 hr)Total outflow
1.2 m³/s
▲ +0.1 m³/s (1 hr)Effective capacity
2,603.7 10k m³
Net Flow Balance
牡丹水庫 · Real-time hydrological balance and storage dispatch analysis
Inflow (Qin)
1.83 m³/sUpstream catchment runoff inflow rateTotal outflow (Qout)
1.2 m³/sGate release and flood desilting rateNet Flow Balance (ΔQ)
+0.63 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
1.2 m³/s
Desilting tunnelBottom desilting and sediment bypass tunnel
0 m³/s
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
牡丹水庫 · Engineering profile and geospatial information
Managing AgencySouthern Region Water Resources Branch, WRA
Facility TypeOn-stream Reservoir
River SystemRureng and Mudan Creeks, Sichong River System
Effective capacity2,603.7 10k m³
Year Completed1995
Geographic Location
22.1389°N, 120.7933°E屏東縣 · 牡丹鄉
Related Reservoirs in Region
Check real-time conditions and historical trends for other facilities in the same region.
Frequently Asked Questions
牡丹水庫 · 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.