Cam and Ely Ouse (Including South Level) catchment
• Isleham • Suffolk • ID: E22374 • Level
(28m ago) • 2 readings/hr • 132 views
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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.
Beta. You'll be notified when a flood wave detected at an upstream gauge is forecast to reach this station, with an estimated arrival time. Accuracy improves as we verify more waves.
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.
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Current Level
2.110 m
▬ Steady
24h Max
2.111 m
24h Min
2.102 m
Typical Range
1.94 - 2.19
m
Highest Recorded
2.72 m
EA official record
2.71 in our data (since Mar 1997)
Current level is 77% of this
🚽Sewage overflows nearby
Recent Water Levels
🌍 floodradar.co.uk
1 day
Prediction V2
Prediction Eris
Nimbus beta
Experimental model fusing soil moisture, river flow, groundwater and catchment
character. Shown with its calibrated 10–90% confidence band. Under evaluation —
not yet promoted, so treat as a second opinion.
Long Term
🌍 floodradar.co.uk
—
Consecutive rainy days0 → 10+
Days Above Normal
This year vs 5-year monthly range
Recent Readings
Rising · +0.6 cm over 6h
23 Aug 23:00▬ steady2.110 m
23 Aug 22:45▬ steady2.109 m
23 Aug 21:30▬ steady2.108 m
23 Aug 21:15▬ steady2.108 m
23 Aug 21:00▬ steady2.108 m
23 Aug 20:45▬ steady2.108 m
23 Aug 20:30▬ steady2.107 m
23 Aug 20:15▼ -0.2 cm2.107 m
23 Aug 20:00▬ steady2.109 m
23 Aug 19:45▬ steady2.110 m
23 Aug 19:30▬ steady2.110 m
23 Aug 19:15▬ steady2.109 m
23 Aug 19:00▲ +0.2 cm2.109 m
23 Aug 18:45▬ steady2.107 m
23 Aug 18:30▬ steady2.108 m
23 Aug 18:15▬ steady2.108 m
23 Aug 18:00▬ steady2.107 m
23 Aug 17:45▲ +0.2 cm2.108 m
23 Aug 17:30▲ +0.2 cm2.106 m
23 Aug 17:152.104 m
Rainfall & Weather
Loading rainfall and weather data...
Flood history near this gauge
Official Environment Agency warnings issued since 2012 for the 4 flood
areas linked to this gauge (nearest 8.8 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 Isleham flood history.
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
🌊 Groundwater-fedSlow and steady — fed largely by groundwater, so levels change gradually, not in sudden spikes.
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
0.78
groundwater-fed — slow & steady
Avg Annual Rainfall
617 mm/yr
1991–2020 · +2% since 1941–70
Urban Extent
2.5%
largely rural
Highest Recorded Flow
19.20 m³/s
8 Mar 1952
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.
Station gauging a navigation lock with Bury St Edmunds and large gw abstractions in the catchment dominated by Chalk geology and arable agriculture.
More detail
The catchment
Chalk, predominantly arable.
The station
Navigation lock with vertical lift gate u/s plus a 16m broad high level weir in bypass channel for flood flows only. Small notch inserted in 1980. 1986 weir was lowered, altered to triangular profile and flows diverted to the bypass channel. The lock is now used during high flows only.
Flow regime
Two large gw abstractions (Bury St Edmunds).
The flow record
Since 1968 major peaks diverted through cutoff channel (10km u/s) - to the Relief Channel at Denver.
How this gauging station is built and how long it has measured (NRFA / UKCEH).
Gauge type
Gauging structure
Operating since
1936–1986
Station datum
2.4 mAOD
Flow record
1936–1986 · 50 yrs · 98% complete
Hydrometric area
33
Measured by
Environment Agency
Nearby Groundwater
Soil Moisture
Possible storm-overflow correlation
🚽 Storm overflows on this river
Frequently asked questions
Is the River Lark at Isleham flooding today?
The current level is 2.11m, which is within the typical range of 1.94 to 2.19m. Flooding is unlikely at this level.
Is the river level rising or falling at Isleham?
Based on the most recent readings, the level is currently steady. The chart above shows the last 7 days of measurements, updated roughly every 15 minutes.
What is a normal level for the River Lark at Isleham?
The typical range at this station is 1.94m to 2.19m, based on Environment Agency historical data. Levels above 2.19m are higher than usually seen and may indicate a flood risk.
How often is this river level data updated?
Readings are taken by the Environment Agency gauge roughly every 15 minutes and FloodRadar refreshes its data continuously, so the level shown is normally less than an hour old.
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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:
