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Upstream Monitoring

During a period of potential flooding in South Oxford you can keep an eye on the rise in water levels in the Thames, Evenlode and Cherwell rivers by looking at the table below. From this information you can assess if the flood waters are likely to keep on rising in our area of the city. The thumbnail graphs in the table show you the river levels at a number of Environment Agency river stations over the past 5 days. The stations are organised by river and are ordered from upstream to downstream. You can see where these stations are located on the map below. If river levels are continuing to rise upstream then the river levels in South Oxford will most likely also rise in the next few days. The table includes a link to a SOFLAG water level site for each river station, as does the map. The table also includes a link to the Government’s ‘Check for flooding’ web page for each river station. (Note, lots of data are being downloaded to produce the table and plots below so it takes a little time initially for these to appear.)

Usually the Thames is the river that determines most the likelihood of flooding – this influences the level in the Seacourt/Hinksey Stream and the River Thames in the South Oxford area. However the Evenlode can be important in controlling the level in the Hinksey Stream in the early stages of a flood and the River Cherwell often adds to the risk of direct flooding of Cold Harbour from the Thames. Groundwater flooding in South Oxford is caused by abnormally high levels in these local rivers.

Because of the complex influence of upstream river levels on flooding that can occur in South Oxford, it is not possible to have a failsafe means to predict if and when flooding will occur. However, the EA’s upstream river level monitoring data can give us some idea when flooding might occur and how serious it might be. Here are two rules of thumb:

  • since the early 2000s we have had major floods in South Oxford when the level of the Seacourt Stream at Minns Estate rises above 2.69 metres
  • often, but not always, if the river level on the downstream side of Shifford Lock reaches 3.90 metres and the river level on the downstream side of Northmoor Lock reaches 3.58 metres there will likely be a major flood in South Oxford. A rise in the river levels at Shifford Lock can often be seen in the Hinksey Stream in South Oxford about 12-24 hours later.
All Upstream Monitoring stations
Station Name and Details Latest Chart (Last 5 days) Last Reading (metres) Last Timestamp Station Type External EA Link
Rushey Lock (down) Thames
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Shifford Lock (down) Thames
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Northmoor Lock (down) Thames
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Eynsham Lock (down) Thames
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Kings Lock (down) Thames
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Iffley Lock (down) Thames
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Evenlode Bridge Evenlode
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Shipton Evenlode
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Banbury Cherwell
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Cassington Weir A Evenlode
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Enslow Weir Cherwell
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Heyford Bridge Cherwell
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Islip Weir Cherwell
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Thrupp Cherwell
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Botanical Gardens Cherwell
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Minns Estate Seacourt
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River

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