Presentation by Gijs Janssen and Gualbert Oude Essink (Deltares) at the iMOD International User Day 2018, during Delft Software Days - Edition 2018. Tuesday 13 November 2018, Delft.

1. iMOD Water Quality
International examples
Gijs Janssen
Gualbert Oude Essink
20181113 DSD

2. What is iMOD - WQ?
- iMOD Water Quality
- Working title
- One code for MT3DMS, RT3D, SEAWAT …
- … in the iMOD environment
- Advantages:
• Seamless connection with iMODFLOW
• I/O can be visualized and edited in iMOD
• Fast, can handle large models
• Free of charge
• … and all the other iMOD advantages
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3. iMOD - WQ
Spring 2019:
Release of open-source iMOD - WQ
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4. Deltares project “Pilot Botlek” in Port of Rotterdam:
Mega Site Approach
supported by contaminant transport modelling
MT3DMS module in iMOD
3D multispecies reactive solute transport modelling
Gijs Janssen and Annemieke Marsman, Delt20181113 DSD

5. Rotterdam model
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6. iMOD-MT3DMS Port of Rotterdam
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fresh groundwater
saline groundwater
saline groundwater
fresh groundwater
3D CONTAMINANT PLUME INSPECTION IN iMOD

7. The CARROT Workflow
19 November 2018

8. Groundwater age (years)
Examples iMOD-MT3D on 3 scale levels
Regional, grid resolution = 100x100m
Local, grid resolution = 10x10m
National,
grid resolution = 250x250m
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9. Impressions of the Nile Delta model
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Exfiltration/infiltration SEAWAT model Salinity distribution iMOD-SEAWAT model
Estimated groundwater extractions delta Geology distribution Nile delta in model

10. Modelling the salinity in the Nile delta, using iMOD-SEAWAT
Effect: abstractions, sea-level rise etc.

11. San Joachim Valley, CA, USA
Coupling processes: SWI GW+SW+subsidence
SOBEK / Delft3D
Resolution: Order of minutes
Developer: Deltares
MODFLOW
Resolution: Order of days
Developer: USGS
SEAWAT
Resolution: Order of yrs (5-10)
Developer: USGS
SubCreep
Resolution: Order of years
Developer: USGS/Deltares
VelocitiesHead/Pressure
output
output
Ground water salinity
input
Output
Non-stationary subsidence
VelocitiesWater level
output
Salinity input
input
input
input
Conceptual delta model
diagram
Mekong Delta, VN, 2018
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12. SWIBANGLA
Managing Salt Water Impacts in Bangladesh
May 2013 – September 2014
Marta Faneca, Gijs Janssen, Gu Oude Essink, Deltares

13. iMOD-SEAWAT to build a 3D variable-density grw. model
3D data as input, e.g. boreholes
to build up the subsurface:
aquifers and aquitards
ASCII’S as
input
E.g. surface
elevation
Analysis of the output as ASCIIS and 3D figures and data sets
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14. Examples iMOD-SEAWAT 3D fresh-salt groundwater models
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15. Parallelization heavy 3D iMOD-WQ models
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speed up factor 14-20 and countingRhine-Meuse-Scheldt
NL
BeNeKempen, NL

16. Towards Open-Source: Building test bench
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Salt water pocket
Henry
Elder
Freshwater
lens
Sharp
interface
Hydrocoin

17. Code cleanup
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18. User manual
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- WQ

19. iMOD-WQ functionality in iMOD Project Manager
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20. 20181113 DSD
THANK YOU FOR YOUR ATTENTION !