Unavailable 13-23 April 2018: migration to new platform

On Friday, 13 April, we will start migrating to a new platform.

During the migration it will not be possible to login to oss.deltares.nl.
You can still see all content but you will not be able to edit or post in
the forums or to create/edit an account.

Access to SVN will still be available via https://svn.oss.deltares.nl.

We expect to be able to go live on the new platform by Monday, 23 April.

More info: oss@deltares.nl



LOCKFILL is a quick tool developed by Deltares, enabling the assessment of a shipping lock's performance, in terms of levelling times, forces on vessels and flow velocities on the approach harbour bed.

LOCKFILL computes the longitudinal forces on the ship which are caused by translatory waves, momentum variation, skin friction, the filling jet and a water density difference, based on a one-dimensional approach. The program allows the calculation of various filling and emptying systems in the heads of the lock, e.g. openings in the lock gates, pipes through the gates fitted with butterfly valves, lifting gates or short culverts in the lock head walls. Read more.

The software has a graphical user interface allowing easy input manipulation and showing the computation results in graphs and key indicators. Alternatively, the program can be run in command line.

On this portal you can find the program, its manual and relevant documentation.


17.000+ joined the Deltares
Open Source Community

License update

The current Lockfill license has expired (since May 1st). A new version of Lockfill containing a new license file is available from the download page.

LOCKFILL course June 14th

We will be organizing the second LOCKFILL course on June 14th (during the Dutch Delft Software Days). This course introduces the background of LOCKFILL and the graphical user interface by some hands-on practice. More information can be found here.

Lockfill 5.2 released with new features

Per request of several users of Lockfill the levelling system of a lift gate with stilling chamber (based on the old configuration of the lock at Eefde, the Netherlands) has been made available to regular users. Because it is specifically made for Eefde the input parameters are not as general as for the other levelling systems and it might be difficult to tailor these to your needs.

Fixed write permission problem part 2

Several users complained that Lockfill still gave problems regarding write permissions of the Lockfill work directory. The latest bugfix release should attend to this problem. The working directory has been moved to another location, namely %ProgramData%. This should fix the problems many people have been experiencing. Please contact us via the "Get help" page if you still experience problems running Lockfill.

LOCKFILL course October 27th

We will be organizing a LOCKFILL course on October 27th (during the International Delft Software Days). This course introduces the background of LOCKFILL and the graphical user interface by some hands-on practice. 

For more information or registration, visit http://www.dsd-int.nl/training/lockfill-hydraulic-design-schipping-locks/

Hope to see you there!

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