1. SOBEK in Jakarta FEWS

2. Sobek in this course Today (with Daniel Tollenaar):
1. The role of SOBEK in “Jakarta FEWS”
2. What does SOBEK RR do (as in Jakarta)?
3. What does the SOBEK 1D-2D do (as in Jakarta)?
Next Monday (with Eelco Verschelling):
The development of the Jakarta Sobek model
- How is it build?
- Where is it build for?
- What can (and can’t) you do with it?
Objective: not to build a Sobek model yourself, but to understand what is happening when you turn on the “run Sobek workflow” in FEWS

3. “Modules” of Jakarta FEWS
P source
(ACCESSA)
FEWS
P transformation
SOBEK
(RR - 1D - 2D)

4. SOBEK 1D / 2D integrated modelling environment for integral solutions

5. About SOBEK
Rural
Urban
River

6. About SOBEK State-of-the-art modelling framework for:
river and estuarine systems,
drainage and irrigation systems and
wastewater and storm water systems
Including hydrodynamics, hydrology, morphology, water quality
Established in the nineties
Over 80 members of staff
Software development, sales, support, training
Part of Deltares
Active in 70 countries worldwide
Agents in Australia, Brazil, China, Indonesia, Germany

7. About a Sobek RR-1D-2D model (as for Jakarta)
SOBEK 1D
SOBEK 2D
Start
End
Sobek
RR - 1D -2D
Hydrology (rainfall-runoff)
Hydro-dynamics

8. Sobek RR (in general) Many concepts available within Sobek:
SOBEK 1D
SOBEK 2D
Start
End
Sobek
RR - 1D -2D
Many concepts available within Sobek:
- For river schematizations:
Sacramento, HBV, SCS
- For urban schematizations (sewers):
NWRW “inloop” model
- For rural schematizations (polders):
“Unpaved”, “Paved” and …. models
Note: also routing (Muskingum) can be applied within Sobek-RR!

9. Sobek RR (in Jakarta) Lumped conceptual hydrological model.
Some parameters can be directly
linked to physics (Ogink). Others
have to be optained by
calibration
Figure: the Sacramento concept
In some catchments, a runoff delay is applied using the Muskingum method

10. Sobek RR (in Jakarta)

11. Rainfall-Runoff in FEWS
What if you want to apply your own rainfall-runoff model and still use the
hydro-dynamics of SOBEK (or of another model)?
Thats where FEWS can help you!
Rainfall-Runoff in Sobek
Seperate rainfall-runoff concept
P source
(ACCESSA)
FEWS
P transformation
SOBEK
(RR - 1D - 2D)
P source
(ACCESSA)
FEWS
P transformation
SOBEK
(1D-2D)
Rainfall-Runoff
model

12. Sobek 1D Basic components of a 1D model Cross sections define the
grid nodes
cross sections
reach segments
Cross sections define the
geometry of your river/canal
Sobek calculates for each time
step:
- water levels at grid nodes
- discharges/velocities at reach segements

13. Sobek 1D-2D
1D-2D is a 1 dimensional network combined with a 2 demensional grid
1D network and 2D network
communicate via 1D grid nodes
and underlying 2D cells

14. Example 1:Katrina New Orleans, USA

15. Example 2: Polder inundation from boezem

16. Example 3: Serious gaming (1953 floods)

17. Example 4: Inundation plantation schemes Musi

18. Discussion: some questions
- When do we need a 1D and when a 2D model?
- What do we require for building a good 1D-2D model?
- What do we require for simulating with a RR-1D-2D model?
- How do you communicate model results?
- ……