DEL072 – 11201392 Phase 2 – Delft3D-Slurry development and validation

Aanleiding van het project

Sediment waste of mine processes (tailings) as well as dredged
sediments are deposited in dedicated deposits, or beneficially re-utilized
to build new lands (e.g. Marker Wadden), to improve resilience of flood
defences or enhance habitat restoration.
The ability to improve the prediction capabilities of the sediment
deposition dynamics as well as the characterisitcs and properties of the
resulting deposits (e.g. distribution of sand and mud, strength, total
settlement and time scale) is critical to reduce cost and risk of these
activities. Current knowledge and predictive tool is nowadays limited.
This project builds up on the positive development and findings of the
previous phase, towards further improving understanding and modeling
of soft sediments depositional processes

Doel van het project

One of the key challenges in Delta Technology is related to possibilities
of building on and with soft material. Soft materials (e.g. from dredged
material and mine tailings) can be reused to form robust water
defences, enclosure dams and for land building. The material can be
used to combat settlement in Sustainable Delta Cities, as a costeffective
material for flood defences, and as the basis for nature-based
land reclamations like Marker Wadden. As such, “Bouwen met Slib” has
been identified as an important innovation to strengthen the
international position of Dutch engineering companies.
This project will improve the recent new version of the numerical tool
Delft3D to improve prediction of geometry and material properties
distribution in fine sediments and disposal site deposits, with specific
focus on dewatering and basic 3D processes.

Omschrijving van de activiteiten

1) Further validation of the new Delft3D-slurry module developed
during Phase I
2) Theretical development of aging (i.e. time dependent strength
development) function and embedding in Delft3D-slurry
3) Exploration of 3D performance

Verwachte resultaten

This project will inventorize and integrate current knowledge, embed it
into the current numerical tool when appropriate, validate and test the
new tool against industry data, deliver the tool as open source, and
produce (at least) one conference publication, and likely one course on
modeling of deposition of soft sediments.
Alongside the new model developments, the results of the project will
provide an improved understanding of mine tailings and dredged
sediment management and reuse. Through partners such as IOSI,
Carleton University and TU Delft, this will lead to an enhancement of
international knowledge within the industry network.
This model will be able to be utilized by the Dutch partners (e.g.
dredging industry or RWS) on large on-going soft sediment projects to
improve accuracy of design and reduce risks and cost (e.g. MarkerWadden).

Innovativiteit

The behaviour of soft sediments and slurries in depots and land
reclamations is surrounded by uncertainties. The availablility of new
monitoring data and measurements will allow a major advance in our
understanding of this behaviour and in the ability to model and predict
its future properties.
This project will begin from the promising results of Phase I. These will
be expanded by adding a sediment aging time-dependent function, and
likely basic 3D simulations. The resulting model will be the single model
world-wide with 2D and potentially 3D prediction capability of these
processes.

Valorisatie

This project will take advantage of parallel collaboration with Carleton
University (CU – Canada) and the Technical University of Delft (TUD).
CU and TUD will provide instrumental experience and background
knowledge to the project. Vice versa, the results of this project will be
embedded in the portfolio of CU and TUD and further disseminated to
students and utilized as background information for subsequent followup
up research lead by these institutes.
When properly finalized and verified, project results in terms of
software and documentation will be made available via the Deltares
Open Source Software site:
http://oss.deltares.nl/web/delft3d
The theory developed will be part of the Master Thesis lectures at the
Technical Delft University of the PI of the project (Dr. Arno Talmon).
This material will also be disseminated by Deltares at short courses.
Project results will be presented at various conferences worldwide (e.g.
Delft Software Days, http://www.dsd-int.nl/; IOSTC; PASTE)

Link naar projectresultaten…