Silas - EBP-10 tackles mud survey problem
Van Oord, a world leading dredging contractor, is frontrunner in
maintenance dredging works with their water injection dredging
techniques. Natural influx of mobile muds and induced fluid muds are the
environment to be dealt with. The fluid mud itself does not pose any
problem for the shipping, but it prevents the surveyor from mapping a
reliable nautical bottom. Both high and low frequency channels do not
provide stable depth readings.
Van Oord deployed both single and
multibeam echosounders. High frequency signals have the tendency of
penetrating trough the mud when a very gradual water-mud transition is
present. Low frequencies are generally unstable and tuning of the
digitalisation settings is required frequently.
To overcome these problems the EBP-10 echosounder/subbottom profiling
unit with the Silas data-acquisition package was tested. The high
resolution seismic profiles combined with the fast autotracing
algorithms appeared accurate and efficient.
Based on the results the system was purchased and is bound for implementation on the site shortly.
- light blue: SB 210kHz, red: SB 33 kHz, Green: MB 240 kHz
- dark blue: HRS autotrace top slingmud, yellow: HRS autotrace Top bottom
Read WHITEPAPER survey in soft mud