Presentation by Frans Roelofsen and Roelof Stuurman (Deltares) at the iMOD International User Day 2018, during Delft Software Days - Edition 2018. Tuesday 13 November 2018, Delft.

1. New Orleans groundwater modelling
iMOD Userday
Geology and Groundwater modelling approaches using iMOD
Frans Roelofsen (Roelof Stuurman)
November 13, 2018

9. Greater New Orleans Urban Water Plan

10. Project New Orleans
Regional Groundwater monitoring and
subsidence reduction strategy
Objectives:
• Subsurface management
• Subsidence analysis, forecasting and management
• Shallow groundwater analysis and management
• Salinization risk
• Urban flooding
“The aim is to build an instrument that is supported by all relevant
stakeholders and easily accessible and understandable for
stakeholders.”

12. iMOD Project Manager
Topics:

14. Regional Model: subsidence / fresh salt
16 november 2018

15. Regional Model: subsidence / fresh salt
16 november 2018
MODFLOW SUB-CR
MODFLOW SEWAT

16. Regional Model: subsidence / fresh salt

17. Regional Model: subsidence / fresh salt
16 november 2018

18. Regional Model: subsidence / fresh salt
16 november 2018

19. Urban groundwater model
16 november 2018

20. 1.Conserve► 2. Store► 3. Drain
Sequence for minimizing the risk of flooding

21. Urban problem: Increase of paved area leads to
• Less infiltration (groundwater recharge)
• Higher peak discharges

22. 16 november 2018

23. 16 november 2018

24. Local model: urban geology
16 november 2018

25. Project New Orleans
Challenge
• Bring together all geology data, system understanding
• Geological Model of Holocene layer
• Modelling heavy rainfall events
• Saturated zone
• Interaction groundwater – sewer system
• Saltwater intrusion
• MODFLOW 6