London catchment
• Grove Park • England • ID: 4386TH • Level
(31m ago) • 4 readings/hr • 140 views
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⤴Unusual rise — FloodRadar+Top 1% rise rate for this gauge.
Height for "Above a height"
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You'll be notified when this gauge is rising more than 0.10 mASD/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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Current Level
0.016 mASD
▬ Steady
24h Max
0.021 mASD
24h Min
0.009 mASD
Typical Range
0.04 - 0.96
mASD
Highest Recorded
1.04 mASD
11 Mar 2014
Since Nov 2012
Current level is 2% 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.
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.
Long Term
🌍 floodradar.co.uk
—
Consecutive rainy days0 → 10+
Days Above Normal
This year vs 5-year monthly range
Recent Readings
Rising · +0.4 cm over 6h
24 Aug 00:00▲ +0.1 cm0.016 mASD
23 Aug 23:45▬ steady0.015 mASD
23 Aug 23:30▬ steady0.015 mASD
23 Aug 23:15▲ +0.1 cm0.014 mASD
23 Aug 23:00▬ steady0.013 mASD
23 Aug 22:45▲ +0.3 cm0.012 mASD
23 Aug 21:30▬ steady0.009 mASD
23 Aug 21:15▬ steady0.009 mASD
23 Aug 21:00▬ steady0.009 mASD
23 Aug 20:45▬ steady0.009 mASD
23 Aug 20:30▬ steady0.009 mASD
23 Aug 20:15▬ steady0.009 mASD
23 Aug 20:00▬ steady0.009 mASD
23 Aug 19:45▼ -0.1 cm0.009 mASD
23 Aug 19:30▬ steady0.010 mASD
23 Aug 19:00▬ steady0.010 mASD
23 Aug 18:45▼ -0.1 cm0.011 mASD
23 Aug 18:30▬ steady0.012 mASD
23 Aug 18:15▬ steady0.012 mASD
23 Aug 18:000.012 mASD
Rainfall & Weather
Loading rainfall and weather data...
Flood history near this gauge
Official Environment Agency warnings issued since 2011 for the 7 flood
areas linked to this gauge (nearest 0.2 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 Grove Park 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
🌊 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
0.71
groundwater-fed — slow & steady
Avg Annual Rainfall
685 mm/yr
1991–2020 · +0% since 1941–70
Urban Extent
37%
heavily urbanised
Highest Recorded Flow
1.40 m³/s
12 Oct 1993
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 19%Grassland 23%Urban 57%
Urban 54% → 57% since 1990
About this gauge
Intermittent river that regularly dries during the summer. Flat V weir installed 2002.
More detail
The catchment
Geology: London Clay, also Reading/Woolwich Beds. A linear urban/suburban catchment in south London.
The station
Flat V weir installed 2002 (large fall d/s implies full modular range); replaced (with marginal increase in catchment area) rectangular critical depth flume (flood walls added May 1982) 220m u/s.
Flow regime
Responsive regime. No significant artificial influences.
The flow record
Sensibly continuous flow record. Original station subject to considerable gravel accretion.
How this gauging station is built and how long it has measured (NRFA / UKCEH).
Gauge type
Flat-V weir
Operating since
1962
Station datum
36.3 mAOD
Flow record
1992–2024 · 32 yrs · 91% complete
Hydrometric area
39
Measured by
Environment Agency
Nearby Groundwater
Soil Moisture
Possible storm-overflow correlation
🚽 Storm overflows on this river
Frequently asked questions
Is the River Quaggy at Chinbrook Park flooding today?
The current level is 0.02m, which is below the typical range. Flooding is very unlikely at this level.
Is the river level rising or falling at Chinbrook Park?
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 Quaggy at Chinbrook Park?
The typical range at this station is 0.04m to 0.96m, based on Environment Agency historical data. Levels above 0.96m 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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Free live river-level widget — ideal for parish councils, angling clubs and local sites. Updates automatically.
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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:
