This document summarizes the key topics discussed at the iMOD International User Day conference. It includes closing remarks highlighting the use of iMOD and other tools to model groundwater resources and assess future demand. Upcoming releases of iMOD in November/December 2017 and February 2018 are planned to include new features like an extended water balance tool, voxel modeling, and deviated wells. The document discusses potential changes to the iMOD release process and schedule.

1. iMOD International User Day
Summary, closing remarks
& planned releases
Delft Software Days 2017
October 31st 2017

2. Method:
• Share with you some personal observations
as an attempt to summarize today
• Warning, I am not claiming:
• to be complete
• nor hitting exactly the aimed point of the presenter
Closing remarks

3. • You need a lot of groundwater to fracturing possible
• Groundwater modelling here has the purpose to assess where
demand in the future will occur.
• The concept of consequences sets
• An iMOD – Delft-FEWS is used to estimate Supply Capacity
Kevin Parks, “Shale-Gas Revolution”

4. Determining groundwater depletion:
• Volume- versus flux-based methods
• Decreasing global data availability versus decreasing accuracy
Problem:
• When pumping starts, not everything comes out of storage
Marc Bierkens: “Global Groundwater Modelling”

5. • Challenges: ‘poldering’, financing and maintenance & support
• iMOD is already part of the toolbox National Hydrological Instrument
Daan Dunsbergen: “Netherlands Hydrological Instrument”

6. • Aquifer recovery
as a result of leakage in the drinking water system
Stefania Valenzuela Velazquez: “Xochimilco”

7. • iMOD, RIBASIM and WFlow
are coupled through Delft-FEWS as a workflow manager
Frans Roelofsen: “Delft-FEWS, RIBASIM & iMOD in India”

8. • Modelling groundwater yielded the insight that a much stronger
ambition was possible: “Keep the contiminations within the
boundaries of the Port of Rotterdam”
Jan-Willem Meertens: “Port of Rotterdam”

9. • We should do much more with isotopes
• Impressive 3D geo-model
Cinthya Gómez Castro: GW-isotopes, San José, Costa Rica

10. • “Credibility is really important,
disseminating our geological models can contributes to that.”
Kevin Parks: “iMOD to dissimenation geological AGS models”

11. • ‘Probabilistic voxel modelling’ yields ensembles of geo-models
as a successor of atlas with ‘hardcopy cross-sections’
Peter Vermeulen: “Geomodelling in iMOD using Voxels”

12. • Immediately putting the new 3D Voxel modelling to the limit
Marc Hijma: “integrating data types in local scale geo-model”

13. • Parameterizing 3D faults is complex but doable with iMOD
Koen van der Hauw: “Enhanced Horizontal Flow Barrier”

14. • Interactively zoom in in composed waterbalance timeseries.
Hendrik Kok: “new waterbalance tool”

15. • Overall speed up strongly depends on hardware
• Invest in load-balancing
Jarno Verkaik: “High Performance Computing”

16. MetaSWAP is also coupled with:
• TRANSOL for salinity transport
• WOFOST for crop growth
Paul van Walsum: “Recent MetaSWAP-developments”

17. • Salt water intrusion is a land subsidence issue
Gualbert Oude Essink: “iMOD-SEAWAT-MT3D developments”

18. Planned project-triggered releases:
• November / December 2017: iMOD 4.2
• The extended waterbalance tool
• February 2018: iMOD 4.3
• Voxel modelling
• Fence diagrams
• Deviated wells
• 201x?: iMOD 4.x
• the SUB-CR package
(depending on synchronisation with USGS)
Planned releases

19. We are still considering to switch to:
• 1 or 2 iMOD-releases per year on fixed dates e.g. March 1st and
September 1st
• Independent from project-ignited releases
We are also considering to add another Service Package that
includes monthly or bi-monthly beta-releases.
Changing the release process