Presentation by Joost Icke, Deltares, at the Delft3D - User Days (Day 4: Water quality and ecology), during Delft Software Days - Edition 2019. Thursday, 14 November 2019, Delft.

1. D e l f t 3 D - U s e r D a y s ( W a t e r q u a l i t y a n d e c o l o g y )
New features D-Water Quality in Delft3D FM Suite 2020
and ongoing developments
Joost Icke

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Contents
• Emissions modelling
• 3D Modelling with Delft3D FM
• Large scale simulations
• Global modelling
• New data sources
• Policy support and stakeholder engagement

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Emissions Modelling
D-Water Quality (1D2D3D)
D-Hydrology
D-Emissions
Societal, ecological impact
D-Flow FM (1D2D3D)

4. D-Emissions
• Source oriented approach
• Mass balance approach
• Responds to inter-annual hydrology variations
such as peak discharges during heavy rainfall
• Is flexibility with respect to compartments,
hydrological processes & models, substances,
pathways and sources
• Coupled to hydrological models, such as wflow
and HYPE
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Plastic Emissions
• Implement macro-plastics in Emissions Module
• First application for Indonesia
• Estimates of MPW releases, spatially
distributed
• 1x1 km resolution wflow (hydrological) model
of Indonesia

6. Emerging Substances
• EU-project SOLUTIONS
• E-Hype hydrology model
• Emissions modelling with DELWAQ core for water quality
• Emission proportional to expected release intensity of
chemicals
• Formulated as a function of GDP and population density
• Accounting for expected level of pollution control
• DELWAQ simulates the tracer and calculates the average
• Conversion to worst case effect in postprocessing step
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3D Modelling with Delft3D FM

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3D Modelling in Flexible Mesh

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Project: Validation of D-Water Quality

10. Application: Wadden Sea
• For Dutch Ministry of Public Works (Rijkswaterstaat)
• Simulation of hydrodynamics, temperature, salinity,
suspended sediments
• Resolution: 100x100m or 200x200m; 10 or 20 layers
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100x100, 20 layers, salinity 2017

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3D Modelling in Flexible Mesh
• First applications for delta areas worldwide
• Z-layers for a good 3D representation of
temperature and salinity
• Still a learning process:
• Optimization of grid area
• Horizontal and vertical resolution for optimal
model results vs. model run times

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Large scale simulations
D-Water Quality (1D2D3D)D-Flow FM (1D2D3D)
D-Water Quality (1D2D3D)
D-Flow FM (1D2D3D)

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Online coupling of D-Water Quality
• Run hydrodynamics and water quality together
• No storage of large communication files
• Integration of computational kernels
• Ability for parallel computation

14. Application: North Sea
• JMP-EUNOSAT project:
• estimate natural reference concentrations of nutrients and chlorophyll-a with a series of models
• based on land use and population densities around 1900
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Global Modelling

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Global Data and Models
• Global water models are available:
• Global Storm Surge Model
• Global Hydrology Model
• Global Groundwater Model
• Couple emissions and water quality modules
• Explore and connect global data sources

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UN Water Quality Assessment
• UN resolution UNEP/EA.3/Res.10 December 2017
• Worldwide Assessment of Freshwater Quality
(WWQA)
• To be presented at 5th Session of the United Nations
Environment Assembly in 2021
• By Global Environment Monitoring System Unit
(GEMS) van UN Environment
• Sustainable Development Goals
• SDG 6: “Ensure availability and sustainable
management of water and sanitation for all”
• Establish a network of partners and a platform for
water quality information and services

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Towards a Global Modelling Platform

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Data driven modelling

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Remote Sensing
• Monitoring of marine systems, e.g. North Sea
• Chlorophyll-A mapping
• Combine with in-situ measurements, such as the
Ferry-box
Algal bloom Baltic sea, source: ESA

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Crowd Sourcing
• Involve stakeholders in water quality monitoring
• Nitrate strips
• Use of the smartphone
• Results are shared in a map online

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DNA-kit for Swimming Water

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Policy Support and Stakeholder Engagement

24. Modelling Community
“Our vision is to support the development of an
open source , open access, web-based
infrastructure around the San Francisco Bay-Delta”
http://www.d3d-baydelta.org/
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San Francisco
Sacramento

25. Global
Climate
Models
Downscaled
to Region
Downstream models
of sediment
transport,
geomorphology,
water temperature,
phytoplankton,
benthos,
contaminants, fish
Courtesy : J. Cloern
Watershed
Model
Approach
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26. Cascade setupIntegrated Approach
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27. Application: salinity intrusion (work Knowles, Lucas, Martyr-Koller)
• X2 definition: the distance from Golden Gate Bridge to
the daily 2 psu isohaline near the bottom of the water
column.
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28. More water will be needed to keep X2 downstream
• For a desired X2, e.g. 55 km:
• Current day needs ~ 1500 m3/s
of freshwater.
• SLR=167cm needs at least twice
that amount of freshwater.
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San Francisco Bay and Delta: suspended sediments

30. Application: suspended sediment (work Michelle Gostic)
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D-Flow FM
Model
D-Water
Quality
Model
• River discharge
• Oceanic water level,
salinity, temperature
• Wind
• Bathymetry
• Air temperature
• Bed shear stresses
• Hydrodynamics
• Salinity field
• Temperature field
• Geometry
• SSCs
• Sediment
pathways
• Sediment loads
• Initial bed composition
• Bed model
Offline coupling between D-Flow FM and D-Water Quality

31. Concept of the community model:
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Research
Consultancy
Networking
• The community model concept sets standard
for strong linkage of hydraulics to water quality
by integrating all environmental aspects.
• Research : Open-source and open-access
developments + Scientific feedback and
progress
• Consultancy: Scientific basis for sound
consultancy
• Networking: Involvement of several institutes
& continuous building with multiple discipline
and parties

32. Kitchen Table Tool
• Impact of mitigation options
• At the level of farms, fields, areas
• Discuss ‘at the kitchen table’ with farmers
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Water Quality Software
• Research
• Code development
• Testing and validation
• Pilot applications
• Beta testing program Delft3D Flexible Mesh:
• D-Emissions
• D-Water Quality (3D)

34. back 
close 
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Thank you – questions?
Joost Icke
Program leader Integrated Modelling
and Monitoring
Deltares
joost.icke@deltares.nl