DSD-INT 2018 iMOD X - MODFLOW6 developments - Icke
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The IMOD-X project focuses on groundwater modeling, addressing challenges like water distribution, pollution, and land subsidence. It introduces Modflow 6, an advanced kernel that supports unstructured grids and aims to enhance modeling accuracy while dealing with complex geological formations. The project emphasizes software development and cooperation with user groups to meet market demands through pilot projects and improved functionalities.
DSD-INT 2018 iMOD X - MODFLOW6 developments - Icke
- 1. T h e i M O D - X p r o j e c t The iMOD-X project Joost Icke
- 2. TheiMOD-Xproject 2 Groundwater • Drinking water • Agriculture • Industry • Water storage • Thermal storage • Environmental flows
- 3. TheiMOD-Xproject Challenges • Location of wells • Water distribution • Pollution • Salt intrusion • Land subsidence • Inundation … flooding • Heat capacity • Recharge capacity • Engineering 3
- 4. TheiMOD-Xproject 4 Modelling • Levels • Flow • Substances • Subsidence
- 5. TheiMOD-Xproject 5 Strengths of iMOD • User Interface • MODFLOW kernel • Interactive modelling • Visualisation • Large, high resolution models • Scaling • Subdomains • Easy to use • Good performance • Open source
- 6. TheiMOD-Xproject 6 Community • The Netherlands (consortia) • International • ~1.950 members • https://oss.deltares.nl/web/imod
- 7. TheiMOD-Xproject 7 New kernel: MODFLOW 6 • Developed by USGS • Unstructured grids • Jarno Verkaik: research, parallel version
- 8. TheiMOD-Xproject 8 MODFLOW 2005 MODFLOW 6 Structured grid Structured and unstructured grid Quasi-3D Fully 3D Number-driven input Key-word driven input Single precision data storage Double precision data storage Single precision output Double precision output Procedural programming Object-oriented programming MODFLOW-88 style Started from scratch Comparison of MODFLOW 2005 and MODFLOW 6 • MODFLOW-6 requires much more computational resources (CPU, RAM) • Programming with MODFLOW-6 is a lot harder • We cannot easily replace our current iMODFLOW by MODFLOW-6
- 9. Added value of MODFLOW 6 • New model setup. It’s a platform for supporting multiple models within the same simulation (object oriented) • Unstructured grid: • Geotechnical applications on a local scale • Exact position of the filter of drinking water extractions • Regional detail (nature conservation areas, drinking water production areas, rivers) • Modelling delta areas and the upstream catchment in one model (The Netherlands, Mekong delta) • Model the top layers in greater detail than the deeper layers, use detailed Geotop data • Model complex geological formations (Anisotropy using XT3D package) • Work with the official USGS kernel. Some clients want to use the latest software TheiMOD-Xproject 9
- 10. TheiMOD-Xproject 10 First applications with unstructured grids river locations computed by WFlow groundwater abstraction well
- 11. TheiMOD-Xproject 11 Workflow with new kernel
- 12. TheiMOD-Xproject 12 The iMOD-X project • Develop a new iMOD version • Pilot projects • Requirements • Software architecture • Respond to market demand • Software development • Cooperation with USGS and user groups
- 13. TheiMOD-Xproject 13 Pilot projects • 3D schematisation of subsoil • Salt and water quality • Run models with scripts • Coupling with current iMOD • Land subsidence • Example projects
- 14. Pilot project on schematisations Selected benefits of the MODFLOW 6 kernel: Elegant option to pinch out of model layers (aquifers): • No need for hypothetical interfaces – vertical flow over pinched-out layer are solved internally • No complex translation of 3-D subsurface geology to model layers Elegant incorporation of sub models for (multiply): • Refinements in XY-planes • Refinement along the vertical TheiMOD-Xproject 14
- 15. Sub modelling in the XY-plane 1) Local Sub Model 2) Global Model TheiMOD-Xproject 15
- 16. Sub modelling in the XY-plane FUNCTION=RUNFILE !## MASTER PROJECTFILE PRJFILE_IN=.mf6_fine.prj !## EXPORT TO MF6 NAMFILE_OUT=.mf6_finemf6_fine.NAM MF_TYPE=2 !## NUMBER OF SUBMODELS NSUBMODEL=2 WINDOW1=0.0,0.0,1000.0,1100.0 CELLSIZE1=100.0 WINDOW2=300.0,300.0,700.0,800.0 CELLSIZE2=50.0 TheiMOD-Xproject 16
- 17. Sub modelling in the Z-direction FUNCTION=RUNFILE !## MASTER PROJECTFILE PRJFILE_IN=.mf6_fine.prj !## EXPORT TO MF6 NAMFILE_OUT=.mf6_finemf6_fine.NAM MF_TYPE=2 !## NUMBER OF SUBMODELS NSUBMODEL=2 WINDOW1=0.0,0.0,1000.0,1100.0 CELLSIZE1=100.0 ILAY1=1 WINDOW2=0.0,0.0,1000.0,1100.0 CELLSIZE2=50.0 ILAY2=1 1) Sub Model for model layer 1 2) Sub Model for model layer 2 TheiMOD-Xproject 17
- 18. Salt and Water Quality • Structured and unstructured grid • With and without density effects • Observations: • Code is still in development • Single species, transport, no processes • Documentation is work in progress TheiMOD-Xproject 18
- 20. Structured grid, no density effects 20Initial condition TheiMOD-Xproject
- 22. Regular grid, with density effects 22Initial condition TheiMOD-Xproject
- 24. Scripting: from data to model to visualisation • New scripts in Julia • Performance similar to Fortran • Easy high level API TheiMOD-Xproject 24
- 25. TheiMOD-Xproject 25 Global Modelling using MF6 (an example)
- 26. TheiMOD-Xproject 26 Comparison with MODFLOW 2000 Global Modelling: Difference within the heads
- 27. TheiMOD-Xproject 27 Land subsidence • USGS develops a SUB-module for MODFLOW 6 • Same concepts as MODFLOW 2005 • No creep, no peat oxidation • Creep: • Deltares has developed the SUB- CR module for MODFLOW 2005 • Consider coupling SUB-CR to MODFLOW 6 • Peat oxidation: • Process in the unsaturated zone
- 28. TheiMOD-Xproject 28 Software team • Working on a common vision and software development methods
- 29. TheiMOD-Xproject 29 Plans • Continue with pilots • Product vision and architecture • Involve relevant national and international stakeholders
- 30. terug sluiten T h e i M O D - X p r o j e c t 30 Thank you for your attention joost.icke@deltares.nl @joosticke nl.linkedin.com/in/joosticke