Beam and Ingrebourne catchment
• Upminster • Greater London • ID: 5550TH • Level
(36m ago) • 3 readings/hr • 146 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.
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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Not an emergency service — if in danger call 999. Alerts rely on
EA/SEPA/NRW data and are best-efforts. Terms
Current Level
0.102 mASD
▬ Steady
24h Max
0.116 mASD
24h Min
0.094 mASD
Typical Range
0.10 - 1.15
mASD
Highest Recorded
1.75 mASD
EA official record
1.75 in our data (since Oct 1981)
Current level is 6% of this
🚽Sewage overflows nearby
Recent Water Levels
🌍 floodradar.co.uk
1 day
EA forecast (official)
Flood predictions aren't generated for
lock / structure gauges —
their levels are driven by gate operation,
not by catchment rainfall, so the forecast models would have no skill here.
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 7 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.
1 storm overflow is traced upstream of this gauge, the nearest 8.4 km away along the river. 0 report discharging now, 1 reports not discharging.
Anglian Water · into Mardyke W Trib Trib Thames Est · 5.7 km away in a straight line · several watercourses close by, nothing to choose between them
0 spills · 0 hours in 2025
Not discharging now · last
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 →
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 Upminster flood history.
Flood areas linked to this gauge
Flood warnings and alerts are issued for whole areas. These are the 14 areas linked to this gauge, nearest first.
🌊 Urban & flashyHeavily built-up — rain runs off hard surfaces fast, so levels can spike within hours of heavy rain.
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
0.28
flashy — rain runs off fast
Avg Annual Rainfall
615 mm/yr
1991–2020 · +1% since 1941–70
Urban Extent
17%
heavily urbanised
Median Annual Flood
7.40 m³/s
QMED — typical yearly peak flow
Highest Daily Mean Flow
18.20 m³/s
21 Nov 1974 · 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.
Essex profile modified Flat V Crump weir situated in a rural headwater with artificial influences from urban land uses.
More detail
The catchment
Largely impermeable catchment (London Clay/glacial deposits). Rural headwaters but substantial urban development around lower reaches.
The station
Essex profile (modified Flat V Crump) weir in 9.5m wide section, operated as a rated section. Used for both Water Resource and Flood Incident management. Only gauging station on the Ingrebourne river, approximately 7km upstream of confluence with the Thames.
How it measures flow
All but exceptional floods contained. Operated as a rated section but rating based on modelled equation for Essex weirs. Model-based calibration assumes modularity; however, non-modular flow can occur as low as 0.4mASD depending on downstream conditions. Rating estimates of modular flow thought to be reasonable but tendancy to overestimate below Q70. No gaugings beyond QMED. One peak flow rating applied across period of record.
Flow regime
Runoff increased by effluent returns but reduced by industrial/agricultural abstraction. Minor net augmentation of runoff through transfer from River Beam. Reservoir(s) in the catchment affect runoff.
The flow record
Naturalised flow available for period 1970-75. Bypassing thought to have occurred during the three highest peaks in AMAX series. Full period of record peak flow data reviewed and released in August 2025 (WINFAP Files v14).
How this gauging station is built and how long it has measured (NRFA / UKCEH).
Gauge type
Gauging structure
Operating since
1970
Station datum
11.6 mAOD
Flow record
1970–2024 · 54 yrs · 100% complete
Peak-flow record
since 1970
Hydrometric area
37
Measured by
Environment Agency
Nearby Groundwater
Soil Moisture
Frequently asked questions
Is the River Ingrebourne at Gaynes Park flooding today?
The current level is 0.10m, which is within the typical range of 0.10 to 1.15m. Flooding is unlikely at this level.
Is the river level rising or falling at Gaynes Park?
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 Ingrebourne at Gaynes Park?
The typical range at this station is 0.10m to 1.15m, based on Environment Agency historical data. Levels above 1.15m 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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