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GWILLS

Unknown
• ID: E44975 (formerly SW85F055) • Flow
⚙ The Environment Agency registered this site as SW85F055 until 2 Aug 2026; its history is included on this page.
(24m ago) • 4 readings/hr • 133 views
Current Flow
0.075 m3/s
▬ Steady
24h Max
0.075 m3/s
24h Min
0.065 m3/s
Typical Range
-
Highest Recorded
23.27 m3/s
27 Jan 2026
Since Feb 2025
🚽 Sewage overflows nearby

Recent Flow Readings

🌍 floodradar.co.uk
1 day

Recent Readings

Rising · +0.7 cm over 6h
20 Sep 07:30 ▬ steady 0.075 m3/s
20 Sep 07:15 ▬ steady 0.075 m3/s
20 Sep 07:00 ▬ steady 0.075 m3/s
20 Sep 06:45 ▬ steady 0.075 m3/s
20 Sep 06:30 ▬ steady 0.075 m3/s
20 Sep 06:15 ▬ steady 0.075 m3/s
20 Sep 06:00 ▬ steady 0.075 m3/s
20 Sep 05:45 ▬ steady 0.075 m3/s
20 Sep 05:30 ▬ steady 0.075 m3/s
20 Sep 05:15 ▲ +0.4 cm 0.075 m3/s
20 Sep 04:30 ▬ steady 0.071 m3/s
20 Sep 04:15 ▬ steady 0.071 m3/s
20 Sep 04:00 ▬ steady 0.071 m3/s
20 Sep 03:30 ▲ +0.3 cm 0.071 m3/s
20 Sep 03:15 ▬ steady 0.068 m3/s
20 Sep 03:00 ▬ steady 0.068 m3/s
20 Sep 02:45 ▬ steady 0.068 m3/s
20 Sep 02:30 ▬ steady 0.068 m3/s
20 Sep 02:15 ▬ steady 0.068 m3/s
20 Sep 02:00 0.068 m3/s

Rainfall & Weather

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Flood history near this gauge

Official Environment Agency warnings issued since 2012 for the 4 flood areas linked to this gauge (nearest 1.6 km away).

1severe warning 25flood warnings 99flood alerts

Most recent flood warning: 26 Jan 2026 — Bolingey Stream from Bolingey to Perranporth

Year by year
YearSevereWarningsAlerts
2026 0 2 0
2025 0 0 2
2024 0 4 8
2023 0 3 8
2022 0 1 4
2021 0 0 5
2020 0 3 15
2019 0 3 13
2018 0 1 9
2017 0 0 6
2016 0 4 15
2015 0 2 14
2013 0 1 0
2012 1 1 0

Warnings apply to a whole flood area, not necessarily this exact spot. Years before 2006 aren't covered by the EA's historic record.

Nearby Stations

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Station Details

  • Monitoring Station: GWILLS
  • Watercourse: —
  • Nearest reservoir: Blackpool Pit (16.2 km) · 79.5% full (as of 31 May 2026)
  • Coordinates: 50°23'35"N 5°3'23"W (50.393097, -5.056267)
  • Open in: Google Maps · Apple Maps (opens your maps app)
  • Status: Active
  • Station Type: Flow gauging station (inferred)
  • Station Reference: E44975
  • Previous references: SW85F055 (to 2 Aug 2026)
  • Also at this site: Gwills (49130, level, reporting)
  • EA Gauge ID: E44975-flow-water-i-15_min-m3_s
  • Parameter: Flow
  • Unit: m3/s
  • Typical rise rate: 4 cm/hr (p95 sustained over 90 days)
  • Typical data delay: ~22 min (measured reading→publication lag)
  • Tidal: No
  • Lock / structure: No
  • Drainage Area: 41 km² upstream of this gauge
  • Flow Archive: National River Flow Archive ↗

Geographic coordinates may reflect the access point for the gauge, and not the precise location in the watercourse that it is taking readings from.

Catchment Character

🌊 Mixed response A balance of quick runoff and slower groundwater baseflow.

Your catchment is all the land that drains rainfall into the river above this gauge. Its character — how steep, wet, wooded, urban or chalky that land is — decides how fast rain here turns into a rising river. A steep, bare or clay catchment is “flashy” (rises and falls quickly, floods easily); a flat, chalk or well-wooded one is slow and steady. The tiles below put numbers to that; the flow-duration curve reads left-to-right from the river’s typical high flows (Q5) down to its low flows (Q95) — a steep curve means a flashy river.

The physical character of the land that drains to this gauge, and how it shapes its flood response — from the National River Flow Archive (UKCEH).

Baseflow Index
0.62
mixed response
Avg Annual Rainfall
1,100 mm/yr
1991–2020 · +3% since 1941–70
Urban Extent
0.7%
largely rural
Median Annual Flood
14.05 m³/s
QMED — typical yearly peak flow
Highest Daily Mean Flow
11.40 m³/s
24 Nov 2012 · daily mean, not the instantaneous peak
Flow-Duration Curve
mean 0.7382.320.4500.0925% (high)% of days exceeded95% (low)
Daily flow (m³/s) exceeded each % of the time — a steep curve is flashy, a flat one is steady. Q5 high · Q50 median · Q95 low.
Land Cover (2023)
Woodland 7%Grassland 57%Arable 29%Heath/scrub 2%Urban 4%Other 1%
Arable 39% → 29% since 1990

Flow affected by: groundwater abstraction, effluent returns, industrial / agricultural abstraction.

Photos

Gauging-station photographs from the National River Flow Archive (UKCEH).

5 Jun 2025 — Looking downstream from gauging station over weir to right bank. Stage: +0.08m. 5 Jun 2025 Looking downstream from gauging station over weir to right bank. Stage: +0.08m. 5 Jun 2025 — Looking downstream from gauging station over weir to right bank. Stage: +0.08m. 5 Jun 2025 Looking downstream from gauging station over weir to right bank. Stage: +0.08m. 5 Jun 2025 — Looking upstream from gauging station towards right bank. Stage: +0.08m. 5 Jun 2025 Looking upstream from gauging station towards right bank. Stage: +0.08m. 5 Jun 2025 — Looking upstream from gauging station at +0.08m 5 Jun 2025 Looking upstream from gauging station at +0.08m 24 Nov 2012 — High flow 24 Nov 2012 High flow 4 Jul 2012 — Looking downstream from right bank 4 Jul 2012 Looking downstream from right bank 4 Jul 2012 — Looking downstream from right bank 4 Jul 2012 Looking downstream from right bank 4 Jul 2012 — Looking downstream from right bank 4 Jul 2012 Looking downstream from right bank 4 Jul 2012 — Looking upstream from right bank 4 Jul 2012 Looking upstream from right bank 4 Jul 2012 — From right bank 4 Jul 2012 From right bank 4 Jul 2012 — Weir from right bank 4 Jul 2012 Weir from right bank 4 Jul 2012 — Looking upstream from right bank 4 Jul 2012 Looking upstream from right bank 3 Dec 1971 — Upstream view to gauging station 3 Dec 1971 Upstream view to gauging station NRFA gauging station photo Control Control Downstream view to gauging station Downstream view to gauging station

Photos © NRFA / UKCEH & the measuring authority — shown at web resolution. Full gallery on the NRFA ↗

About this gauge

Crump profile weir, non-modular at high flows. Troubled by accretion downstream of structure filling the fish pool.

More detail

The catchment

Moderately steep catchment having subdued response, draining calcareous slates and thin limestones of the lower Devonian. Land use is low-grade agriculture; pasture, mainly diary and mixed farming. No major changes to catchment.

The station

Crump profile weir, crest length 6m, wing walls 1.9m.

How it measures flow

Flood banks contain flow up to 2.78m; they may be treated as weirs for higher stages. Survey of wrack marks following the 2012 floods show that the weir was drowned at a stage of 1.558 m. Initial analysis suggests this drowning would reduce peak flows by approximately 20%. However insufficient gaugings are available to revise the existing empirical rating. As such the flow data at these levels must be treated with caution. Bypassing is unlikely at stages below structure full, although the valley inundates upstream of the road bridge. Insensitive at low flows. Troubled by accretion downstream of structure filling the fish pool. One peak flow rating applied across period of record. Weir known to be non-modular during 2012 floods, therefore drowning known to affect station at 1.558 m. No rating revision yet made due to a lack of gaugings. Downstream level sensor installed in August 2022 to inform the degree of non-modularity and a high flow rating review.

Flow regime

Natural catchment but mine drainage may affect low flows. Runoff influenced by groundwater abstraction/recharge. Industrial/agricultural abstractions and effluent returns have minimal impact.

The flow record

Full period of record peak flow data reviewed and released in September 2023 (WINFAP Files v12).

Descriptions from the National River Flow Archive (UKCEH). NRFA station record ↗

Gauge Details

How this gauging station is built and how long it has measured (NRFA / UKCEH).

Gauge type
Crump weir
Operating since
1969
Station datum
8.8 mAOD
Flow record
1969–2024 · 55 yrs · 100% complete
Peak-flow record
since 1969
Hydrometric area
49
Measured by
Environment Agency

Frequently asked questions

Is GWILLS flooding today?

The latest recorded level is 0.08m. Compare it with the recent history on the chart above to judge whether levels are unusually high.

Is the river level rising or falling at GWILLS?

Based on the most recent readings, the level is currently steady. The chart above shows the last 12 hours of measurements by default (up to 7 days), updated roughly every 15 minutes.

How often is this river level data updated?

Readings are supplied by the Environment Agency gauge. FloodRadar checks for updates roughly every 15 minutes; the timestamp above shows how recent the latest available reading is.

Embed this gauge on your website

Free live river-level widget — ideal for parish councils, angling clubs and local sites. Updates automatically.

Preview

📮 Flood risk by postcode near this gauge

Postcodes within 5 km with properties in the Environment Agency’s rivers-and-sea flood-risk bands:

Check any UK postcode’s flood risk →

🏠 Buying or renting around here? Get the Property Flood-Risk Report for any English postcode — official risk band, recorded floods, warning history, river behaviour and nearby storm overflows. £19 one-off. Learn more →