Bristol Avon Little Avon Axe and North Somerset St catchment
• Tytherton Lucas • Wiltshire • ID: 53132 • Level
(36m ago) • 3 readings/hr • 149 views
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⤴Unusual rise — FloodRadar+Top 1% rise rate for this gauge.
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You'll be notified when this gauge is rising more than 0.10 m/hr — a sign of rapidly increasing water levels.
You'll be notified when a new storm-overflow (sewage) discharge starts within ~3 km of this gauge, based on the water companies' near-real-time feeds.
Get notified when recent rainfall near this gauge crosses its learnt rise trigger — an early "watch"
signal, typically hours before a rise. Experimental; not an official flood warning.
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Not an emergency service — if in danger call 999. Alerts rely on
EA/SEPA/NRW data and are best-efforts. Terms
Current Level
0.381 mASD
▬ Steady
24h Max
0.419 mASD
24h Min
0.381 mASD
Typical Range
0.40 - 1.10
mASD
Highest Recorded
3.45 mASD
EA official record
3.19 in our data (since Jan 1970)
Current level is 11% of this
🚽Sewage overflows nearby
Recent Water Levels
🌍 floodradar.co.uk
1 day
EA forecast (official)
Prediction V2
Prediction Eris
Nimbus beta
Experimental model fusing soil moisture, river flow, groundwater and catchment
character. The shaded band is its 10–90% range, widened so that about 80% of recent outcomes fall inside it.
Under evaluation — not yet promoted, so treat as a second opinion.
River Flow
90 days
Daily mean discharge (m³/s) with the daily min–max band, from the EA Hydrology API. Flow is the volume of water passing the gauge — often a more direct flood signal than level.
Flow Data: Daily mean flow (m³/s) to 6 Oct (2 days behind — the EA publishes each day's mean a day or two after it ends; unchecked, provisional)via EA Hydrology
Storm overflows whose water reaches this gauge on the mapped river network, nearest first by distance along the river. The status is each water company's monitor: it says whether an overflow is discharging, not how much or what it contains.
10 storm overflows are traced upstream of this gauge, the nearest 3.5 km away along the river. 0 report discharging now, 10 report not discharging.
Wessex Water · into A Tributary Of The River Avon · 5.9 km away in a straight line · no mapped watercourse close enough to be sure
0 spills · 0 hours in 2025
Not discharging now · last
13 other overflows within 6 km are downstream of this gauge or on another branch of the river network, so they are not listed.
These are the water companies' monitor statuses; a spill does not by itself explain a change in the gauge level. River connections and distances are traced on OS Open Rivers (edition 2026-04), which leaves out many small channels. Explore the sewage map →
In a typical year this gauge reaches its typical high of 1.10 m
on about 50 days.
This year so far: 40 days.
202640 days, 1 of them high · 1 highso far
202533 days, 7 of them high · 7 high
202486 days, 20 of them high · 20 high
202384 days, 11 of them high · 11 high
202228 days, 2 of them high · 2 high
202135 days, 2 of them high · 2 high
202080 days, 7 of them high · 7 high
201953 days, 4 of them high · 4 high
201836 days, 3 of them high · 3 high
201716 days
Counted from each day's highest reading. Days with missing or implausible readings are left out.
The darker part is days above 1.93 m, the level this gauge tops only a few days a year.
Flood history near this gauge
Official Environment Agency warnings issued since 2008 for the 2 flood
areas linked to this gauge (nearest 9.5 km away).
Warnings apply to a whole flood area, not necessarily this exact spot. Years before 2006 aren't covered by the EA's historic record.
See also the Tytherton Lucas flood history.
Flood areas linked to this gauge
Flood warnings and alerts are issued for whole areas. These are the 2 areas linked to this gauge, nearest first.
🌊 Mixed responseA 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
0.56
mixed response
Avg Annual Rainfall
810 mm/yr
1991–2020 · +5% since 1941–70
Urban Extent
2.8%
largely rural
Median Annual Flood
13.91 m³/s
QMED — typical yearly peak flow
Highest Daily Mean Flow
26.85 m³/s
23 Sep 2024 · daily mean, not the instantaneous peak
Flow-Duration Curve
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 6%Grassland 51%Arable 34%Urban 8%
Grassland 64% → 51% since 1990
Flow affected by: public water supply, effluent returns.
Photos
Gauging-station photographs from the National River Flow Archive (UKCEH).
Trapezoidal critical depth flume with ultrasonic gauge. Some of the vegetation and trees on banks encroach on the river and possibly restrict flow.
More detail
The catchment
The catchment is predominantly rural with the towns of Calne and Lyneham the only significant urban areas. Geologically, the catchment is dominated by Oxford Clay and other impermeables with Chalk outcrops in headwaters. No major catchment changes.
The station
Station located approx. 2km east of Chippenham and was opened in 1970. Trapezoidal critical depth flume. Ultrasonic gauge installed 11/2007.
How it measures flow
Full range station. Level only station prior to 07/1969. Stanley Bridge, 100 - 150m upstream, causes throttling at high flows. Significant bypassing occurs at highest flows (e.g. 07/2007). One peak flow rating applied across period of record. Top end modelled and verified by ultrasonic readings. The river bed is composed of gravel and is lined with trees and vegetation, some of the vegetation and trees encroach on the river and possibly restrict flow. Water levels frequently reach the structure's capacity. Few high flow gaugings. Suffers from backing up, mainly at high flows.
Flow regime
Minor surface water abstractions and discharges in catchment. Some milling takes place.
The flow record
Full period of record peak flow data reviewed and released in September 2019 (WINFAP Files v8) and in August 2025 (WINFAP Files v14).
How this gauging station is built and how long it has measured (NRFA / UKCEH).
Gauge type
Flume
Operating since
1969
Station datum
47.3 mAOD
Flow record
1970–2024 · 54 yrs · 100% complete
Peak-flow record
since 1970
Hydrometric area
53
Measured by
Environment Agency
Nearby Groundwater
Soil Moisture
Possible storm-overflow correlation
Frequently asked questions
Is the River Marden at Stanley flooding today?
The current level is 0.38m, which is below the typical range. Flooding is very unlikely at this level.
Is the river level rising or falling at Stanley?
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.
What is a normal level for the River Marden at Stanley?
The typical range at this station is 0.40m to 1.10m, based on Environment Agency historical data. Levels above 1.10m are higher than usually seen and may indicate a flood risk.
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.
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📮 Flood risk by postcode near this gauge
Postcodes within 5 km with properties in the Environment Agency’s rivers-and-sea flood-risk bands:
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