Mudan Reservoir
South · 四重溪支流汝仍溪、牡丹溪 Basin
Capacity
31.19 hm³
Coordinates
22.140°N, 120.783°E
Operator
Water Resources Agency (WRA)
Current fill
84.9%vs 7 days ago
+12.4%gaining
vs 1 year ago
+16.9%year-over-year
7-day trend
↑rising
Catchment Weather
Past 30 days + 14-day forecast · Open-Meteo
Technical specifications
| Total capacity | 31.19 hm³ |
| Usable capacity | 26.04 hm³ |
| Dam height | 65 m |
| Dam type | embankment |
| Primary use | Multi-purpose |
| Operator | Water Resources Agency (WRA) |
| River | 四重溪支流汝仍溪、牡丹溪 |
| Autonomous community | South |
| River basin | 四重溪支流汝仍溪、牡丹溪 Basin |
Satellite imagery: Esri, Maxar, Earthstar Geographics. Map: Esri, HERE, Garmin, © OpenStreetMap contributors. 22.140, 120.783 · Open in Google Maps
About Mudan Reservoir
As of July 3, 2026, Mudan Reservoir is filled to 84.9% of its total capacity, holding roughly 22 hm³ of water out of a maximum 31 hm³. At this level the reservoir is high. Of that total, about 26 hm³ is usable (live) storage.
Over the most recent week on record the fill level has risen by 12.4 percentage points, and it is 16.9 points above its level on the same date a year earlier.
Across the readings we hold for Mudan Reservoir — 1126 data points between January 22, 2003 and July 3, 2026 — the level has ranged from a low of 13.5% (July 22, 2024) to a high of 110.0% (November 8, 2003). On average the reservoir is fullest around November and at its lowest around May.
The dam at Mudan Reservoir stands 65 m tall and is a embankment dam. It is operated by Water Resources Agency (WRA) primarily for multiple purposes. It lies within the 四重溪支流汝仍溪、牡丹溪 Basin basin at 22.140°N, 120.783°E.
Key facts
- Current fill level
- 84.9%
- Water stored
- 22 hm³
- Total capacity
- 31 hm³
- Usable capacity
- 26 hm³
- 7-day change
- ▲ 12.4 pts
- Year-on-year
- ▲ 16.9 pts
- Primary use
- Multipurpose
- River
- 四重溪支流汝仍溪、牡丹溪
- River basin
- 四重溪支流汝仍溪、牡丹溪 Basin
- Dam height
- 65 m
- Operator
- Water Resources Agency (WRA)
- Coordinates
- 22.140°N, 120.783°E
- Last updated
- July 3, 2026
Recent readings
| Date | Fill level | Volume (hm³) |
|---|---|---|
| 3 Jul 2026 | 84.9% | 22 |
| 15 Jun 2026 | 72.5% | 19 |
| 8 Jun 2026 | 42.4% | 11 |
| 1 Jun 2026 | 39.7% | 10 |
| 22 May 2026 | 43.5% | 11 |
| 15 May 2026 | 45.9% | 12 |
| 8 May 2026 | 48.6% | 13 |
| 1 May 2026 | 51.2% | 13 |
| 22 Apr 2026 | 54.5% | 14 |
| 15 Apr 2026 | 57.4% | 15 |
| 8 Apr 2026 | 60.2% | 16 |
| 1 Apr 2026 | 62.8% | 16 |
Frequently asked questions
What is the current water level of Mudan Reservoir?
As of July 3, 2026, Mudan Reservoir is at 84.9% of its capacity, holding approximately 22 hm³ of water, according to WRA data.
Is Mudan Reservoir reservoir full?
No. As of July 3, 2026, Mudan Reservoir is high at 84.9% of its capacity, so it is not full.
Is the water level at Mudan Reservoir rising or falling?
The level at Mudan Reservoir is rising — it gained 12.4 percentage points over the latest week on record.
How much water can Mudan Reservoir hold?
Mudan Reservoir has a total capacity of 31 hm³, of which about 26 hm³ is usable storage.
Where is Mudan Reservoir reservoir located?
Mudan Reservoir is located in South, Taiwan, within the 四重溪支流汝仍溪、牡丹溪 Basin basin (coordinates 22.140°N, 120.783°E).
What is Mudan Reservoir used for?
Mudan Reservoir is used primarily for multiple purposes, and is managed by Water Resources Agency (WRA).