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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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Last Level
-0.038 mASD
⚠ 8d ago · may be out of date
24h Max
-
24h Min
-
Typical Range
0.25 - 1.00
mASD
Highest Recorded
1.63 mASD
EA official record
A 3.25 reading (11 Mar 2024) sits in our unverified raw history and is not treated as the record
Flow Data: Daily mean flow (m³/s) to 8 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.
13 storm overflows are traced upstream of this gauge, the nearest 1.6 km away along the river. 0 report discharging now, 13 report not discharging.
Severn Trent Water · into Tributary Of Leas Brook · 1.4 km away in a straight line · its watercourse is not on the river map
0 spills · 0 hours in 2025
Not discharging now
8 more within 6 km whose connection is not known.
14 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 1.00 m
on about 14 days.
This year so far: 3 days.
20263 days, 3 of them high · 3 highso far
20252 days
202423 days, 20 of them high · 20 high
202325 days, 19 of them high · 19 high
202213 days, 8 of them high · 8 high
202118 days, 13 of them high · 13 high
202018 days, 10 of them high · 10 high
20197 days, 4 of them high · 4 high
20188 days, 4 of them high · 4 high
201713 days, 12 of them high · 12 high
Counted from each day's highest reading. Days with missing or implausible readings are left out.
The darker part is days above 1.18 m, the level this gauge tops only a few days a year.
Flood history near this gauge
Official Environment Agency warnings issued since 2012 for the 7 flood
areas linked to this gauge (nearest 3.0 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 Mansfield 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.
🌊 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
0.84
groundwater-fed — slow & steady
Avg Annual Rainfall
765 mm/yr
1991–2020 · +6% since 1941–70
Urban Extent
39%
heavily urbanised
Median Annual Flood
13.15 m³/s
QMED — typical yearly peak flow
Highest Daily Mean Flow
9.32 m³/s
20 Oct 2023 · 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.
Crump profile Flat V weir that replaces (1996) 28059 Mansfield STW - closed in 1984.
More detail
The catchment
Moderate relief catchment near headwaters of Maun. Rises on Magnesian Limestone and crosses onto Sherwood S'st. Heavily urbanised with Mansfield and Sutton in Ashfield immediately u/s.
The station
Crump profile Flat V (1:10) weir, 4.8m wide, low vertical wingwalls set in wider channel. Lb at about 2m, Rb higher. Weir prone to u/s siltation - sand is mobile, especially under high flow conditions and is washed away in high events - results in variable levels and scatter in gaugings. Replaced 28059 Mansfield - old site was replaced due to drowning of the flume and accumulation of rubbish. Structure situated downstream of sewage works in Mansfield.
How it measures flow
Flows are derived from the Flat-V Theoretical equation throughout the full flow range. Mobilisation of sand results in variable levels, scatter in gaugings. Difficult to gauge above 0.4mASD due to very flashy response; difficult to catch events. Structure becomes non-modular at high flows.
Flow regime
Urbanised catchment. Very responsive to rainfall, very rapid rise and fall in the hydrograph. Low flows dominated by sewage effluent and augmented by runoff from urban area that effectively increases catchment area. Very atypical water balance. Second rise in flood hydrograph often follows initial peak from urban runoff, as flows from the rural upper catchment move downstream.
The flow record
Full period of record peak flow data reviewed and released in September 2019 (WINFAP Files v8).
Timing, not cause. Gauges can move together simply because the same rain fell on both.
Frequently asked questions
Is the River Maun at Mansfield The Dykes flooding today?
The current level is -0.04m, which is below the typical range. Flooding is very unlikely at this level.
What is a normal level for the River Maun at Mansfield The Dykes?
The typical range at this station is 0.25m to 1.00m, based on Environment Agency historical data. Levels above 1.00m 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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View of weir from slightly downstream on the left bank
View of weir from upstream on the left bank
View of weir from immediately downstream