- On 18th July 2021
- In General, Research and Development, Sediment Management, Surveying
- By David
In June this year Exo Environmental carried out sediment sampling along the
river Trent at Flixborough, North Lincolnshire. Using our Exo surveyor, we
launched from RMS Trent Ports and carried out benthic riverine sediment
sampling using our Van Veen sampling grab.
In what was most likely the hottest day of the year, we donned our drysuits
and PFD’s to head out on to the water. This was important as the strong
currents in the river alongside low water temperature would cause serious
issues should someone fall overboard and not be prepared with the appropriate
safety equipment. Using Trimble VRS Now RTK corrections we navigated our
way to the pre agreed sampling locations. Once in the correct location, we
anchored in place, recorded our actual sampling GPS position, and the Van
Veen sampler lowered overboard.
The strong undercurrents in this section of the Trent provided a difficult
challenge to obtain a sample, as the grab was often pulled sideways in
the water column.
However, as always Exo had the answer and fitted additional mud weight
attachments to the sampler arms to ensure a straight line decent to the
bed through the water column.
Once on the bed the sampler was closed shut by pulling the attached lever
and pulled to the surface. The benthic sediment was then emptied and stored
in double bagged plastic liners and placed in cold storage, which was very
important on this hot day!
In total 12 samples were collected, each weighing roughly 1.5kg. After
demobilisation and transport back to the office the samples were sieved
at 0.5mm and all organisms and debris collected was stored and sent to our
Ecologist for benthic species assessment.
This assessment will help the client determine the health of the water body
and sediment in this stretch of the River Trent and inform future management
techniques for maintaining or improving the water quality.
If you need a waterbody, harbour or marina surveying then remember we are
now available to conduct in situ sediment sampling, bathymetry and water
You can contact us via email email@example.com, the form on our
Contact Page or on any of our social media accounts! Twitter. Also, if you
haven’t already, make sure you check out our YouTube channel and subscribe!
We’re posting an array of videos from project updates to tutorials and more!
Visit our YouTube channel here: Exo Environmental YouTube.