Contact Us

For information about the Sullied Sediments project, contact:

Project Lead
Professor Jeanette Rotchell
University of Hull 
(+44)1482 465333 

Project Coordinator
Annabel Hanson
East & North Yorkshire Waterways Partnership
(+44)1482 391678

Science in Action!

Sullied Sediments Volunteer Sampling Map

So far, we’ve received water sampling results from volunteers active on the Pocklington Canal, the Aire and Calder, River Tees, Selby Canal, Sheffield and South Yorkshire Canal and River Don. These watercourses are all in the UK's Humber catchment.

Our plan has always been to create a map that shows where our volunteers have been sampling. This map is now available online and you can view it by clicking the link below. These records are the first of many that we hope will be sent to us by volunteers working in all three river catchments:

Below are a few pointers for understanding how the map works:

Each pin represents a single record uploaded via the RiverDip app. The pins are colour coded to reflect the level of phosphate found at that location. We use five colours for five different levels: none, low, medium, high and ‘failed for one reason or another’.

As you will see, many of the records indicate low levels of phosphate or levels below what we can measure (shown as none on the map). We do see some areas where medium or high levels of phosphate are detected too. More often than not, these higher levels occur when sediment has been disturbed and the phosphate has been re-released into the water column, giving us a temporary area of high phosphate concentration.

On the map you will also see a number of ‘failed devices’: these are tests that have not yielded any useful results. This can occur for various reasons, for example water may not have been able enter the PAD, a shadow across the image could distort the image analysis or the image could be obstructed by debris in the sample. In developing anything new we always find problems but we can learn from these as we develop the sampling further. That’s all part of research!

If you have any questions about the sampling programme, please contact our Project Coordinator, Annabel Hanson, at