- On 17th May 2021
- In General
- By Izaak
Two weeks ago, we carried out 3 days of single beam bathymetry surveys of drainage channels in the Cambridgeshire and Lincolnshire fens. This unique environment posed a number of challenges. Perhaps the most challenging was the water depth within the drainage channels, sometimes as low as 20cm, abundant macrophyte mats and low bridges and culverts! To solve this, we deployed our Waveline dinghy to carry out the survey, with its limited draft it was perfect for this environment as well as our Torqeedo electric engine to minimise disturbance of the water environment.
In order to deal with the low air draught bridges and culverts, we also modified our equipment mounting frame, with the new maximum height above the water line being significantly reduced. We were proud to be able to do this and offer a bespoke survey to the client in very nonstandard conditions!
In total we covered 23km on the water, collecting single beam depth data to provide the drainage managers accurate up to date data of sediment accumulation. Furthermore, we collected low frequency bathymetry data showing the original depth of the drainage dykes. This can be used to fill in gaps in unavailable engineering drawings and original plans for this old infrastructure. From all this data combined, detailed desilting and plant clearing campaigns can be scheduled without delay.
This survey proved there is no environment we cannot accommodate when it comes to Bathymetry surveys and water quality and has already led to the confirmation of further surveys in this type of aquatic environment.