WIDECOMBE STW_SO_WIDECOMBE IN THE MOOR

Storm overflow at the works · SBB01359 · feeds WIDECOMBE_STW_WIDECOMBE IN THE MOOR

Dry spill

Evidence strength

Low confidence

✓ Sustained discharge (≥1 h)
✓ Dry on the EA 1-day window

⚠ Monitor only 80% operational that year — data may be incomplete

The discharge

Spill day: Sunday, 2 July 2023
Started: 2 Jul 2023, 11:25
Ended: 2 Jul 2023, 15:18
Duration: 3 hours 52 minutes
Receiving water: East Webburn River
Parish: Widecombe in the Moor

Rainfall evidence

Daily rainfall at the matched gauge (Bellever Dartmoor) 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: Wet weather4-day window: Wet weather

Date	Rainfall
02/07/2023 (spill day)	0 mm	dry
01/07/2023	0 mm	dry
30/06/2023	9.4 mm	rain
29/06/2023	1.6 mm	rain
28/06/2023	2.4 mm	rain

River flow that day: 2.038 m³/s. Verify at the EA rainfall station.

Gauge proximity

Outlet (red) vs matched rain gauge (blue), 6.3 km apart. Closer means the rainfall reading is more representative of the overflow.

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Severity & context

Bathing water: Not Applicable
Shellfish water: Not Applicable
EA annual return (2023): 12 counted spills · 36 h total
Monitor uptime (2023): 80% 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 SBB01359). Rainfall: EA Hydrology gauge 723a8fc4-908b-4430-91c7-9990be86540a_363307. 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.