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SOBEK 3 is refaced against SOBEK 2 in terms of modeling concept and features. This means that some features in SOBEK 2 are no longer supported and some objects are modelled in a different way.
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| SOBEK 2 | SOBEK 3 |
|---|---|
| Hydraulic structures in channel flow module and rainfall runoff module | Hydraulic structures in D-Flow 1d 1D module only |
| Control of structures in channel flow module and RTC module | All control of structures in D-Real-Time Control module (D-RTC_) |
| Rainfall-runoff module contains open water node | D-Rainfall Runoff (D-RR) has no open water node, it contains only rainfall-runoff processes. |
| Rational method in channel flow module (lateral station node) and rainfall-runoff module | No rational method in D-Flow 1d1D. The rational method is only available in D-Rainfall Runoff |
| Storage and lateral node available in channel flow module | D-Flow 1D does not contain a storage and lateral node (planned feature) |
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- Start with the SOBEK 2 channel flow module.
- Modify the SOBEK 2 model in such a way that the corresponding SOBEK 3 model produce produces the same results, or that all differences in results can be explained.
- Finalize the 1D flow model by manual modifications.
- Continue with the rainfall-runoff module.
- Continue with the water quality module.
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To import the model, use the DeltaShell SOBEK 3 import tool:
SOBEK 3 import window. Choose "SOBEK Model (Flow 1D, RTC, RR, WAQ)". This window is accessible via File --> Import
Select case after opening CASELIST.CMT
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- The rational method on lateral inflow is not supported, lateral inflow must be accounted for in a different way, for example with a set of time series.
- Infeasible bottom levels for culverts must be changed.
- Open water nodes are not imported into D-Flow 1d1D. They must be deleted in the SOBEK 2 model.
- Structures in the rainfall-runoff module must be deleted.
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- The initial value 0 of PID controller <id> will not be used. The defined structure dimension is the initial value:
- In SOBEK 3 you can’t define an initial value of the PID therefor , therefore the initial structure setting are used as initial value.
- The initial value -5.37 of PID controller <id> will not be used. The defined structure dimension is the initial value
- In SOBEK 3 you can’t define an initial value of the PID therefor , therefore the initial structure setting are used as initial value.
- Case setting CrestlevelOpeningsHeight cannot be imported, model parameter setting not available.
- Case setting StructureDynamicsFactor cannot be imported, model parameter setting not available.
- Case setting Steady cannot be imported, model parameter setting not available.
- Computational grid import: 1 grid points were skipped in branch '<id>' because there are structures defined at these locations.
- There is no longer a gridpoint on structures necessary.
- Friction data of definition <id> of cross-section <id> has not been found. The main bed of branch <id> is used as roughness data.
- This warning is related to a network element that is no longer available in the model after it has been deleted by a user.
- Friction BDFR <id> is linked to branch definition <id> without any tabulated, standard or river profiles; ignored.
- Friction BDFR <id> is linked to branch that does not exist (id 0); ignored.
- No location with id = <id> found
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Change the numerical parameters Iadvec1D from 4 to 1 and Limtyphu1D from 100 to 0 according to SOBEK 3 user manaualmanual, section 5.10.2.10 (Parameter set for comparison with SOBEK 2, Deltares Systems, 2013).
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- For lateral stations where the inflow is computed with the rational method, corresponding objects must be modelled in a Rainfall-Runoff model.
- Open water nodes from the rainfall-runoff module must be schematized in the D-Flow 1d 1D network.
- Hydraulic structures from the rainfall-runoff module must be added to the D-Flow 1d 1D network.
If the model has a long history, modify your model according to good modeling practice:
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Meijer, D. (2015): Results acceptance test FLOW 1D and RTC SOBEK 3. Deltares draft report 1205718-000-DSC-0124-v1.
Velner, R.; Meijers, E.; KetelaatKetelaar, H.; Heeringen, J.-J.; Stout, J.; van Putten, H. (2013): Pilot: testen van SOBEK3.1 o.b.v. DeltaShell bij Waterschap Rivierenland. Eindrapport. Waterschap Rivierenland. file: PilotSobekDeltaShellWSRL_Groeidocument_v09_final.doc
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