← Dunsford STW, Teign Valley
Spill evidence · Friends of the River Teign
Dunsford STW, Teign Valley
Storm overflow at the works · SBB00388 · feeds DUNSFORD_STW_TEIGN VALLEY
Dry spill
Evidence strength
High confidence- ✓ Dry across a 4-day antecedent window
- ✓ Rain gauge close (≤5 km)
- ✓ Monitor 98% operational that year
- ⚠ Short discharge (<1 h) — weaker signal
The discharge
- Spill day
- Saturday, 4 February 2023
- Started
- 4 Feb 2023, 06:58
- Ended
- 4 Feb 2023, 07:17
- Duration
- 18 minutes 41 seconds
- Receiving water
- Reedy Brook
- Parish
- Dunsford
Rainfall evidence
Daily rainfall at the matched gauge (Mardon Down) for the spill day and the days before. A spill is dry when every day in the window is ≤ 0.25 mm.
1-day window: Dry spill3-day window: Dry spill4-day window: Dry spill
| Date | Rainfall | |
|---|---|---|
| 04/02/2023 (spill day) | 0 mm | dry |
| 03/02/2023 | 0 mm | dry |
| 02/02/2023 | 0.1 mm | dry |
| 01/02/2023 | 0 mm | dry |
| 31/01/2023 | 0 mm | dry |
River flow that day: 3.892 m³/s. Verify at the EA rainfall station.
Gauge proximity
Outlet (red) vs matched rain gauge (blue), 4.8 km apart. Closer means the rainfall reading is more representative of the overflow.
Loading map…
Severity & context
- Bathing water
- Not Applicable
- Shellfish water
- Not Applicable
- EA annual return (2023)
- 146 counted spills · 3034 h total
- Monitor uptime (2023)
- 98% operational
Method & provenance. Dry/wet classification is decided by rainfall at the nearest EA gauge — ≤ 0.25 mm on the spill day and each preceding day of the window (how we classify). Spill data: Environment Agency EDM (outlet SBB00388). Rainfall: EA Hydrology gauge 323b21d8-c9a4-4681-bc5c-62d7337993ac. A dry spill is precautionary evidence of a likely fault, not proof of an offence — we test the rainfall, not the works' flow. Generated by River Teign Data.