SOBEK is a powerful modelling suite for flood forecasting, optimization of drainage systems, control of irrigation systems, sewer overflow design, river morphology, salt intrusion and surface water quality. The modules within the SOBEK modelling suite simulate the complex flows and the water related processes in almost any system. The modules represent phenomena and physical processes in an accurate way in one-dimensional (1D) network systems and on two-dimensional (2D) horizontal grids. It is the ideal tool for guiding the designer in making optimum use of resources.
Fields of application
SOBEK is a modelling suite designed for water authorities and water management consultancies. Is is suited for modelling and analysis of:
- Irrigation and drainage systems / rural systems: open channel hydraulics
- River systems
- Sewerage and urban drainage systems (closed conduits, pipe flow)
- Inundation and flooding scenario simulations
- Water quality predictions
- and the design and optimization of control systems for canal and waterway automation
SOBEK has been developed jointly with Dutch public institutes and governmental organisations, research institutes, universities and private consultants all over the world.
SOBEK offers one software environment for the simulation of all management problems in the areas of river and estuarine systems, drainage and irrigation systems and waste water and storm water systems. This allows for combinations of flow in closed conduits, open channels, rivers overland flows, as well as a variety of hydraulic, hydrological and environmental processes.
Powerful simulation engine
The hydrodynamic 1D/2D simulation engine is the computational core of SOBEK. This engine allows the combined simulation of pipe, river-, channel- and overland flow through an implicit coupling of 1D and 2D flow equations. SOBEK is the ideal tool for studying the effects of dam breaks, river floods, dike breaches, urban flooding etc.
Robust numerical operations
The hydrodynamic 1D/2D simulation engine is equipped with a very robust scheme for numerical computation. It also guarantees mass conservation, even in case of transitions through suddenly varying cross section shapes. The engine combines computations of subcritical and supercritical flow, at scales selected by the user. It handles flooding and drying of channels without the use of artificial methods such as the Preissmann slot.
The hydrodynamic 1D/2D simulation engine has a very efficient numerical solution algorithm. The algorithm is based upon the optimum combination of a minimum connection search direct solver and the conjugate gradient method. It also applies a variable time step selector, which suppresses the waste of computational time wherever this is feasible.
Size of models
The size of the model is only limited by the size of the internal memory of the computer used.
How to get SOBEK?
The latest fully validated SOBEK Suite is version 2.16.004. This version is available via our SOBEK Service Packages. You can easily order these products via firstname.lastname@example.org and then download the software via our Download portal.
SOBEK and Delft3D Flexible Mesh
SOBEK functionality is being integrated in the Delft3D Flexible Mesh Suite. You can read more about it here.
The validation of a modelling system such as SOBEK and Delft3D FM requires continuous attention. Even though the individual modules of the suite have been thoroughly tested during their development, the suite as a whole requires intensive testing and validation too. To this end, a regular programme is established and tests of many of the most likely combinations are continually performed. As a policy, new versions are released only after an extensive beta testing period, to ensure that our users are only provided with stable and validated products.
SOBEK allows you to simulate the interaction of water and water related processes in time and space. The suite is mostly used for the modelling of integrated water systems for water management, design, planning and policy making. SOBEK consists of a number of well-tested and validated modules, which are linked to and integrated with one-another. These modules are listed below.
SOBEK 1DFLOW (Rural)
This module works with the complete de Saint Venant Equations, including transient flow phenomena and backwater profiles. It models any cross section (open and closed), including asymmetrical profiles, and y-z profiles. It even allows you to define different subsections within a...
SOBEK 1DFLOW (Urban)
This module uses the complete de Saint Venant Equations, thus including backwater and transient flow phenomena. It models a wide variety of cross sections and manhole shapes (including user-defined ones) and allows you to build up your own cross section and...
SOBEK 2DFLOW (Overland Flow)
This module is fully integrated with the SOBEK 1DFLOW (Rural) and SOBEK 1DFLOW (Urban) modules for accurate flood simulation of river systems, polder areas, dikes/levees/dam breaches, streets, etc. It is based upon the complete de Saint Venant Equations. The hydrodynamic 1D/2D simulation engine...
SOBEK RR (Rainfall Runoff Open Water)
This module contains a library of Rainfall Runoff modules from polder sub-catchment scale up to river catchment scale, such as HBV and SCS. The catchment areas can easily be modelled in a lumped or detailed manner with no restriction to the...
SOBEK 1DWAQ (Water Quality)
This module is based on the water quality 1D/2D/3D simulation engine which offers you more than 30 years of collective water quality modelling experience world-wide. It models almost any water quality variable and its related water quality processes. This component is...
SOBEK-RTC (Real Time Control)
Real-time control often saves money in the construction, alteration and management of the water system infrastructure. The SOBEK-RTC module shows to what extent the existing infrastructure can be used in a better way. It allows you to simulate complex real-time control of...
Deltares offers high quality services to consultancy firms, governmental organizations, research institutes and universities worldwide.
Several SOBEK service packages, including fully validated high quality SOBEK distributions, are available to suit your specific needs!
SOBEK – Hydrodynamics-Hydrology Basic Service Package
The SOBEK Hydrodynamics-Hydrology Basic Service Package contains: The right of use of the distribution “SOBEK Hydrodynamics-Hydrology”. 12 months update and upgrade subscription. 12 months support on Service Level 1 with 8 support hours, single user support. The minimum subscription period is...
SOBEK – Full Basic Service Package
The SOBEK Full Basic Service Package contains: The right of use of the distribution “SOBEK Hydrodynamics-Hydrology & Water Quality” 12 months update and upgrade subscription. 12 months support on Service Level 1 with 16 support hours, single user support. The minimum...
SOBEK – Hydrodynamics-Hydrology Advanced Service Package
The SOBEK Hydrodynamics-Hydrology Advanced Service Package contains: The right of use of the distribution “SOBEK Hydrodynamics-Hydrology” 12 months update and upgrade subscription. 12 months support on Service Level 2 with 24 support hours: initial and ongoing response within 2 business days. The...
SOBEK – Full Advanced Service Package
The SOBEK Full Advanced Service Package contains: The right of use of the distribution “SOBEK Hydrodynamics-Hydrology & Water Quality” 12 months update and upgrade subscription. 12 months support on Service Level 2 with 48 support hours: initial and ongoing response within...
SOBEK – Professional Service Package
The SOBEK Professional Service Package contains: The right of use of the distribution “SOBEK Hydrodynamics-Hydrology & Water Quality” 12 months update and upgrade subscription 12 months support on Service Level 3 with 64 support hours: initial and ongoing response within 1...
SOBEK – Educational Service Package
The SOBEK Educational Service Package contains: The right of use of the distribution “SOBEK Hydrodynamics-Hydrology & Water Quality”. 12 months update and upgrade subscription. 12 months support on Service Level 1 with 8 support hours. The minimum subscription period is one...
Maintenance and support is included in our SOBEK service packages. Please check the service packages tab for the package that suits your specific needs.
The SOBEK support desk is the user’s instantly accessible contact point for all questions and problems concerning the software. The support team answers the majority of questions instantly or takes responsibility that a timely reply is given by one of the other SOBEK team members. All incoming queries on the software packages, current or future performance, are recorded in our issue tracker system. This system is an important instrument in the realization of improvements to the package, the manuals and the Deltares Academy training courses.
If you have questions about purchasing the software, please contact our Sales Service team. For any of your software technical questions our Support team is happy to help you.
|Sales Service team||Support team|
|T:+ 31 (0)88 335 8188||T:+ 31 (0)88 335 8100|
Migrating SOBEK 2 model to SOBEK 3
Please follow this link for more information.
Unsolved in SOBEK 2.162D Grid causes simulation to stop without error due to Unix End of Line format
SOBEK requires 2D grids to have Windows End of Line format. Grids that have been created on Linux or with QGIS (for example), will need to be converted to the Windows format. If your GIS software does not provide an option to change this, or if you have received your grid from a third party, you can manually change the format as follows:
- Download and install the free text editor Notepad++: https://notepad-plus-plus.org/downloads/
- Open your grid with Notepad++
- In the menu, click on ‘Edit’ – ‘EOL Conversion’ – ‘Windows (CR LF)’
- Save the grid and reopen your SOBEK model
Note: If the option to convert to Windows format is greyed out in Notepad++, your grid already uses the Windows format.
SolvedErrors when opening SOBEK output graphs after installing August 2019 Windows Update
After installing the August 2019 Windows Update, opening graphs in ODS_View will show the following error:
Error 5 : Invalid procedure call or argument ( subDoGraph / CommonObjects10 part 14)
This is a known issue with the August 2019 Windows Update, and Microsoft is working on a resolution. This issue affects all supported Windows versions.
We expect a definitive fix to be distributed by Microsoft on the next Patch Tuesday, on September 10th.
- Blocking or uninstalling the August 2019 Windows Update will prevent the issue from occurring.
- Microsoft has provided temporary fixes for some of the affected Windows versions. These temporary fixes are labelled as “Preview” or “Optional” by Microsoft.
Please consult your IT department in decisions relating to (un-)installing Windows updates.
List of temporary fixes by Microsoft:
- KB4512534 for Windows 10 Version 1809
- KB4512509 for Windows 10 Version 1803
- KB4512494 for Windows 10 Version 1709
- KB4512495 for Windows 10 Version 1607
- KB4517276 for Windows 10 Version 1507
- KB4517297 for Windows 7 und Windows Server 2008 R2
- KB4517301 for Windows Server 2008 SP2
- KB4517298 for Windows 8.1 und Windows Server 2012 R2
Microsoft describes this known issue as follows:
After installing this update, applications that were made using Visual Basic 6 (VB6), macros using Visual Basic for Applications (VBA), and scripts or apps using Visual Basic Scripting Edition (VBScript) may stop responding and you may receive an “invalid procedure call error.”
Frequently asked questions
· The software is delivered with a manual, including Getting Started and Tutorials.
Operating Systems (64-bit only):
- Windows Server 2016
- Windows 10
- Windows 11 (version 22H1)
Administrative privileges are required in order to install and use the software.
Minimum hardware specifications:
- 1.5 GHz Intel Core processor or equivalent
- 2 GB of RAM
- 2 GB free hard disk space
- a graphics adapter with 128 MB video memory and screen resolution of 800×600
Preferred hardware specifications:
- 3 GHz Intel Core processor or equivalent
- 6 GB of RAM
- 20 GB free hard disk space
- a graphics adapter with 256MB video memory and a screen resolution of 1024×768
*SOBEK is a stand-alone application and is not designed to run as a multi-user application in a Remote Desktop Services environment or similar environments.
|Version 2.16.004 2020-06-18|
Download Release notes 2.16.004
|Version 2.16.003 2019-04-18|
Download Release notes 2.16.003
|Version 2.16.002 2018-12-21|
Download Release notes SOBEK 2.16.002
|Version 2.15.003 2016-12-21|
Download Release notes SOBEK 2.15.003
|Version 2.14.001 2015-07-09|
Download Overview of new features and improvements SOBEK 2.14.001
Download Release notes SOBEK 2.14.001
|Version 2.13.002 2013-05-13|
Download Overview of new features and improvements SOBEK 2.13.002
Download Release notes SOBEK 2.13.002
|Version 2.12.004 2012-09-12|
Download Release notes SOBEK 2.12.004
|Version 2.12.003 2012-07-12|
Download Release notes SOBEK 2.12.003
- Solution for problem: Incorrect results in case Y-Z profiles and/or Asymmetrical trapezium profiles are used in combination with Bos & Bijkerk friction type anywhere in a model. Description: in case the Bos & Bijkerk friction type is used anywhere in a model schematisation, the computational core should not switch off the vertically segmented conveyance method applied for all Y-Z profiles and Asymmetrical trapezium profiles, even if another friction formulation is used at such profile.
- In SOBEK 2.12.003 the algorithm of the PID controller has been improved. For some models this might result in computational differences. Clients using models with PID controllers are advised to verify if computational differences between SOBEK 2.12.003 and previous SOBEK versions are acceptable. In case these differences are not acceptable, the gain factors (K p, K i, K d) of the PID controller in SOBEK 2.12.003 need to be retuned.
|Version 2.12.002a 2011-03-23|
Download Release notes SOBEK 2.12.002a
|Version 2.12.002 2010-10-27|
Download Release notes SOBEK 2.12.002
|Version 2.12.001 2009-05-20|
Download Overview of new features and improvements SOBEK 2.12.001
Download Release notes SOBEK 2.12.001