Don and Rother catchment
• Harlington • South Yorkshire • ID: F0803 • Level
(32m ago) • 4 readings/hr • 111 views
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Current Level
0.185 m
▬ Steady
24h Max
0.187 m
24h Min
0.167 m
Typical Range
0.21 - 2.12
m
Highest Recorded
3.91 m
16 Mar 2013
Since Nov 2012
Current level is 5% 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 · +1 cm over 6h
24 Aug 00:15▼ -0.1 cm0.185 m
24 Aug 00:00▬ steady0.186 m
23 Aug 23:45▬ steady0.186 m
23 Aug 23:30▬ steady0.186 m
23 Aug 23:15▬ steady0.186 m
23 Aug 23:00▬ steady0.186 m
23 Aug 22:45▲ +0.1 cm0.186 m
23 Aug 21:30▲ +0.1 cm0.185 m
23 Aug 21:15▲ +0.1 cm0.184 m
23 Aug 21:00▲ +0.1 cm0.183 m
23 Aug 20:45▬ steady0.182 m
23 Aug 20:30▬ steady0.182 m
23 Aug 20:15▲ +0.1 cm0.182 m
23 Aug 20:00▲ +0.2 cm0.181 m
23 Aug 19:45▲ +0.1 cm0.179 m
23 Aug 19:30▲ +0.1 cm0.178 m
23 Aug 19:15▲ +0.1 cm0.177 m
23 Aug 19:00▲ +0.1 cm0.176 m
23 Aug 18:45▲ +0.1 cm0.175 m
23 Aug 18:300.174 m
Rainfall & Weather
Loading rainfall and weather data...
Flood history near this gauge
Official Environment Agency warnings issued since 2012 for the 15 flood
areas linked to this gauge (nearest 0.7 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 Harlington 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
🌊 Mixed responseA balance of quick runoff and slower groundwater baseflow.
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
0.53
mixed response
Avg Annual Rainfall
727 mm/yr
1991–2020 · +3% since 1941–70
Urban Extent
11%
partly urbanised
Median Annual Flood
42.06 m³/s
QMED — typical yearly peak flow
Highest Recorded Flow
72.70 m³/s
8 Nov 2019
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 weir in a heavily urbanised and industrialised catchment. Flow regime controlled by washlands since the gradual closure of mines.
More detail
The catchment
Geology: primarily Carboniferous Coal Measures. Lower Coal Measures dip gently east northeast under more extensive Middle Coal Measures. Shales, overlain by alluvium. Land use: arable farming and moorland pasture in the headwaters. Significant urban development in middle reaches and valleys, including Barnsely. Coal mining and subsequent subsidence of land. Decline of coal mining and manufacturing industries throughout the period of record. Barnsley's growing population (and thereby development) peaked with the mining economy in 1971 (a quarter of Barnsley's population of Barnsley worked in mining by 1981). All mines were closed by 1994 with population decline since. The death of the industry left a legacy of abandoned deep mining pits and opencast coalmines, their associated spoil tips and mine works.
The station
Compound Crump weir with broad-crested flanks built 1963, total width 17.4m, 400m d/s of Adwick Bridge. Cableway located 25m upstream of weir. Fish pass installed June 2013.
How it measures flow
Compound weir with central Crump profile section 5.5m wide, broad-crested flanking weirs with crests 0.4m higher than central weir, sloping side walls and no divide piers. No known bypassing, flow contained by raised embankments, however site is subject to variable back-water from the river Don confluence downstream in large flood events. Problems with draw down effect in stilling well were remedied in 1968. Weir possibly subject to mining subsidence. Rating developed from Crump formula modified to fit to check gaugings at cableway 25m upstream. Rating revised in 2016 to account for drowning / variable backwater but considerable scatter in gaugings above 1.2m stage. Separate level record and rating for fish pass (installed 2013) with flow added to weir flow to calculate total flow. Flood Studies Report grade A2 to 1.4m then B for straight-line extrapolation.
Flow regime
Abstraction to supply from Scout Dike reservoir group and Midhope reservoirs in the Don, discharged to Dearne. Reservoir influence from Worsborough and Bretton Lakes draining around 20% of the catchment. Moderately heavy industrialisation, mine drainage, sewage effluent augmentation and net import of water from Don. Hydrological characteristics altered by surface works and groundwater rebound in response to mine water pumping. The construction of washlands in the Dearne catchment has been an ongoing activity since the gradual closure of mines. Some of the washlands are controlled by two structures: A river regulator at Bolton (upstream of Adwick) and a side sluice gate at Dearne Mouth (downstream). Uncontrolled washlands operate at flows from QMED upwards, the sluice and regulator are operated only in major flood events.
The flow record
Continuous level data from 1961. Flow data from November 1963 but data pre-1975 is thought to be less reliable. Post-1975 flows reprocessed in 1996 (low flows reduced, high flows increased) and again in 2016 (high flows reduced). Major flood events affected by backwater, allowed for in rating but with considerable uncertainty above 1.2m stage (40 cumecs). Increased flows 02/12/2013-05/12/2013 a result on contractors working on site affecting the water level. Data marked as estimated. Full period of record peak flow data reviewed and released in August 2021 (WINFAP Files v10).
How this gauging station is built and how long it has measured (NRFA / UKCEH).
Gauge type
Gauging structure
Operating since
1963
Station datum
12.7 mAOD
Flow record
1963–2024 · 61 yrs · 99% complete
Peak-flow record
since 1956
Hydrometric area
27
Measured by
Environment Agency
Nearby Groundwater
Soil Moisture
Possible storm-overflow correlation
🚽 Storm overflows on this river
Frequently asked questions
Is the River Dearne at Adwick flooding today?
The current level is 0.19m, which is below the typical range. Flooding is very unlikely at this level.
Is the river level rising or falling at Adwick?
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 Dearne at Adwick?
The typical range at this station is 0.21m to 2.12m, based on Environment Agency historical data. Levels above 2.12m 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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Preview
📮 Flood risk by postcode near this gauge
Postcodes within 5 km with properties in the Environment Agency’s rivers-and-sea flood-risk bands:
4 Jun 2014 View downstream towards weir
4 Jun 2014 View upstream towards weir, fish pass on left
4 Jun 2014 View of weir and fish pass from R bank
9 Jul 2013 View upstream from left bank showing weir and fish pass
9 Jul 2013 View downstream from left bank showing new fish pass
6 Jan 2008 View of drowned weir in high flow
Gauging section and weir seen from u/s
Weir and stage board
Recorder hut and weir looking u/s from R bank
Weir looking downstream from right bank
Cableway hut
View upstream towards cableway
