Supervision of sand replenishment in the Wadden Sea
The challenge
For a beach reinforcement project at Wangerooge, in the Wadden Sea, a client needed support in the controlled and efficient processing of 90,000 m³ of sand.
The circumstances were challenging: limited space, changing tides, strong winds and a complex installation including a DOP pump, jet pump, booster, frequency-controlled winches, spud poles, GPS systems and a variable piping system.
Due to a delayed start, the schedule came under immediate pressure.
Our approach
We provided on-site technical supervision throughout the project. Our focus was on:
- Adjusting pumps and frequencies for optimal sand concentration
- Directing operators for the use of booster, jet pump and DOP
- Analyzing flow, pre-pressure and flow rate
- Advice on pipe extension and deployment of auxiliary equipment on the beach
- Tuning DGPS settings on the barge
- Improve collaboration and communication on board
By being continuously present, we were able to intervene immediately in cases such as incorrect start positions, restricted dredge width or incorrect DGPS display.
The result
- Project largely completed on schedule despite difficult start
- Production quickly brought up to standard
- Depot efficiently utilized
- Grip on production, even in the event of disruptions
- Better collaboration and communication on board
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