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Drag the line on the chart, or type a value:mASD
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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
0.110 mASD
▲ Rising
24h Max
0.224 mASD
24h Min
0.065 mASD
Typical Range
0.10 - 0.44
mASD
Highest Recorded
0.69 mASD
EA official record
A 1.20 reading (6 Feb 2014) sits in our unverified raw history and is not treated as the record
Current level is 16% 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.
Downstream level
7 days
The level on the DOWNSTREAM side of this lock/weir structure — a separate EA
measure from the main (upstream) reading shown on the Current tab. Threshold bands
are computed from this gauge's own downstream history.
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
None of the storm overflows FloodRadar holds is traced upstream of this gauge on the mapped river network. That is not the same as none: the map leaves out many small streams and culverts, so an overflow it cannot place may still drain here, and not every company publishes every overflow.
3 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 0.44 m
on about 23 days.
This year so far: 0 days.
20260 days so far
20252 days
2024101 days, 76 of them high · 76 high
202357 days, 27 of them high · 27 high
20220 days
20210 days
202043 days, 4 of them high · 4 high
20190 days
20180 days
20170 days
Counted from each day's highest reading. Days with missing or implausible readings are left out.
The darker part is days above 0.51 m, the level this gauge tops only a few days a year.
Flood history near this gauge
Official Environment Agency warnings issued since 2013 for the 7 flood
areas linked to this gauge (nearest 5.8 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 North Warnborough flood history.
Flood areas linked to this gauge
Flood warnings and alerts are issued for whole areas. These are the 7 areas linked to this gauge, nearest first.
🌊 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
0.91
groundwater-fed — slow & steady
Avg Annual Rainfall
860 mm/yr
1991–2020 · +7% since 1941–70
Urban Extent
4.0%
partly urbanised
Highest Daily Mean Flow
2.39 m³/s
28 Apr 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 12%Grassland 21%Arable 62%Urban 5%
Grassland 30% → 21% since 1990
Flow affected by: groundwater abstraction.
Photos
Gauging-station photographs from the National River Flow Archive (UKCEH).
Crump weir gauging station located within the Upper Loddon catchment.
More detail
The catchment
Catchment is developed almost entirely on Chalk (with modest Drift cover) and is rural in character with scattered settlements.
The station
Opened as a crump weir (width 3.24m), full range with crest tapping, superseding a nearby insensitive rectangular thin-plate weir in 1975 that was operated originally by Mid-Southern Water Company. Index-velocity installed in 2016, but ongoing issues with installation and operation. Removed from peak flows dataset in September 2023 (WINFAP Files v12).
How it measures flow
The channel is of low gradient so the weir is vulnerable to drowning (especially in summer when d/s weed growth can be heavy on the tail). Modular limit approximate 0.13m, station is highly susceptible to non-modular flow conditions. Standard Crump weir calculation using tail levels (previously crest tapping). Editing required, though d/s correction is usually good. Sluice movements u/s affect flows and levels. River banks damaged by livestock increases siltation issues at the site. High flows are generally non-modular and rating uncertain under these conditions. Extreme flows are frequently out of bank.
Flow regime
Stable regime that is baseflow dominated. Runoff influenced by groundwater abstractions and STW outflows. Upstream sluices (at old mill pond) and informal damming of the weir can also significantly disturb the flow pattern. Part of the catchment drains into the Basingstoke Canal; a proportion of this runoff returns to the Whitewater catchment. Occasional fluctuations in levels probably caused either by siphons under the canal or the canal overfall.
The flow record
Data prior to 1975 are of much poorer quality (e.g. resulting from clinging nappe and damaged crest). Archived data: 1910-1926 monthly flows, 1927-1963 daily (but 7-day sequences of identical flows); from 1964 onwards GDFs. No mean flow data after 2016 due to ongoing issues with index velocity instrumentation - difficult to get a reliable relationship.
How this gauging station is built and how long it has measured (NRFA / UKCEH).
Gauge type
Crump weir
Operating since
1910
Station datum
71.5 mAOD
Flow record
1927–2024 · 97 yrs · 93% complete
Hydrometric area
39
Measured by
Environment Agency
Nearby Groundwater
Soil Moisture
Frequently asked questions
Is the River Whitewater at Lodge Farm flooding today?
The current level is 0.11m, which is within the typical range of 0.10 to 0.44m. Flooding is unlikely at this level.
Is the river level rising or falling at Lodge Farm?
Based on the most recent readings, the level is currently rising. The chart above shows the last 12 hours of measurements by default (up to 7 days), updated roughly every 15 minutes.
Why is the level slowly falling?
When little or no rain has fallen for a while, a river level gradually drops as the water stored in the ground and soil drains away with nothing to replace it. This is called baseflow recession and is normal in dry spells. Only about 7.3mm of rain has fallen nearby in the last 7 days, so the flow is being sustained mainly by groundwater. A gentle decline like this is expected and is not a sign of a problem — downstream gauges often recede a little faster than headwaters further upstream, and levels recover once rain returns.
What is a normal level for the River Whitewater at Lodge Farm?
The typical range at this station is 0.10m to 0.44m, based on Environment Agency historical data. Levels above 0.44m 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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