- On 15th May 2017
- In Research and Development, Sediment Management
- By William Coulet
On behalf of our “Using Sediment As a Resource (USAR)”, William recently collected sediments ranging from clays and silts to coarse sands from the Colne Estuary for geotechnical classification by research partners École des Mines de Douai (France) as part of Work Package 2 (WP2), “Cross-border sediment recycling strategy”.
WP2 aims to develop a strategic decision making tool for sediment management that will facilitate and advise on selecting the best method for beneficial use of dredged material (BUDM), dependent on physical and chemical characteristics of the dredged sediments.
For instance, habitat creation is one of the most widely practised methods of BUDM, yet it often requires a significant investment in order to develop the project in the initial stages. As a result of the associated risk and time restrictions, examples of this method are sporadic in location and size.
The matching of sediments at both dredge and receptor sites is one of the fundamental challenges recognised within the BUDM sector with regards to habitat creation, but this challenge also applies to other methods of BUDM, such as agricultural land spreading or flood defence maintenance. This matching is dependent on a number of factors, predominantly: scheduling of both the dredging works and the availability of receptor sites (temporal), the proximity between dredging and restoration sites to minimise logistical challenges (spatial) and the physical and chemical pairing of dredged sediments to receptor sites to avoid environmental damage.
The outputs of the “Cross-border sediment recycling strategy” work package aims to address these issues. The strategic decision making tools currently being developed will provide a more efficient method for the pairing of dredged sediments with BUDM options, thereby overcoming many of the economic, environmental and logistical challenges facing the BUDM sector today.
Of course, Exo Environmental is more than happy to bring our expertise to the partnership and help with the cause, get out in the field and carry out any survey work required. From shovels, to grabs to corers, we have your sediment sampling needs covered!
Day grab benthic sampling example below: