Witney Flood Group

Welcome to our new website!

Here you can see the latest updates on our activities and progress to date as we continue our work to reduce flood risk to Witney

Working for You and for Witney

Our Demands

Help Needed

Updates on our Activities

Press Release – New Website is Live

Press Release - New Website Live 04032025Download

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Press Release – Witney Sensors Project

Joint Press Release - Witney River Sensors Project 02122024Download Oxford Mail 3...

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Winter 2024 Update

November Floods – An estimated 25 properties in central Witney flooded (over...

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Live River Sensor Data

How to Read Sensor Data

Guide to Dataset

  • History – Select view from the top right date ranges bar. Data can be downloaded for analysis.
  • Level Gauges – River level at each sensor location.
  • Location Map – Map view of sensor locations and current height readings.

What is Ordnance Datum?

Ordnance Datum Newlyn (ODN) is the reference value for altitude in the UK when measuring height above sea level. Observations from the tidal gauging station at Newlyn in Cornwall taken by the Ordnance Survey between 1915 and 1921 were the basis for mean sea level (MSL) to be determined.

Relevance in River Engineering

Ordnance Datum is used in every aspect of river engineering because water level is always the fundamental consideration. Here in Witney gauge boards are set to ODN and flood levels recorded against it. As the national standard applications such as topographical survey, mapping, flood modelling, improvement scheme design, construction and channel maintenance also work to ODN.