Dredging - Dumping

Material Type

Choose the material which will be discharged. New materials can be added to the drop down list by selecting the <New> button below the dialog.

Drag Along Coefficient

The Coefficient for the material depends on the shape and can be determined empirically in a laboratory.

Drag Across Coefficient

The Coefficient for the material depends on the shape and can be determined empirically in a laboratory.

Stone Diameter

Enter a value in meters.

Abs. In Situ Density

The density can be determined empirically in a laboratory.

Abs. Solid Density

The density can be determined empirically in a laboratory.

<New>

Add a new Material Type and enter its properties. This Type can then be selected from the drop down list.

<Edit>

Edit an existing Material Type and its properties.

<Delete>

Delete an existing Material Type and its properties.

Load Discharge setup

By Time - A dump bay is emptied in a certain time.
By Rate - The fixed dump rate is known.

Discharge Time

Enter a dumping time in seconds. This is the time it takes for the vessel to empty its bay.
With the dump bay volume and discharge time a discharge rate is calculated.
This discharge rate is used to update the sounding grid when the vessel is dumping.

Discharge Rate

Enter a dumping rate in volume per second.
This should be a constant rate and will be used to update the sounding grid when the vessel is dumping.

Bay x Opened/Closed

Select whether bay doors are used in this process. If so, select whether they are open or closed.

Current measurement

Select whether the current measurement is done with an instrument such as DVL (as entered in Database Setup) or that a manual value will be given.

Manual Current Velocity

Enter a value.

Manual Current Direction

Enter a value.

Current Reference

Relative (Located on Vessel) - The measurement is done on the vessel. The current will be corrected for vessel movement.
Absolute (Located Remotely) - The measurement is done in a fixed location.