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Spill evidence · Friends of the Dart
Rattery STW
Storm overflow at the works · SBB01016 · feeds RATTERY_STW_RATTERY
Dry spill
Evidence strength
High confidence- ✓ Dry across a 4-day antecedent window
- ✓ Rain gauge close (≤5 km)
- ✓ Monitor 100% operational that year
The discharge
- Spill day
- Monday, 29 August 2022
- Started
- 29 Aug 2022, 07:37
- Ended
- 29 Aug 2022, 07:37
- Duration
- 0 seconds
- Receiving water
- Bidwell Brook
- Parish
- Rattery
Rainfall evidence
Daily rainfall at the matched gauge (Austins Bridge) 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 | |
|---|---|---|
| 29/08/2022 (spill day) | 0 mm | dry |
| 28/08/2022 | 0 mm | dry |
| 27/08/2022 | 0 mm | dry |
| 26/08/2022 | 0 mm | dry |
| 25/08/2022 | 0 mm | dry |
River flow that day: 1.108 m³/s. Verify at the EA rainfall station.
Gauge proximity
Outlet (red) vs matched rain gauge (blue), 4.3 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 (2022)
- 140 counted spills · 1956 h total
- Monitor uptime (2022)
- 100% 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 SBB01016). Rainfall: EA Hydrology gauge fd8ea26c-8052-48c5-a1bb-bbd5ebbbb3d3_364176. 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 Hub.