DEL035 1230476 Improving fines capture prediction: verification, application and improvement of Delft3D-Slurry (COSIA)

Geplaatst op: 29 maart 2021

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 aims to contribute to close this key knowledge and tool gap.

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 cost-effective 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 deliver a new version of the numerical tool Delft3D to improve prediction of geometry and material properties distribution in fine sediments and disposal site deposits.

Uitgevoerde activiteiten

1) Data Collection and Analysis. Most of the data will be provided by COSIA. This will be integrated with literature and Deltares data.
2) Optimization of the current model in 2DV. This includes: a) comprehensive rheological model assessment (including literature and knowledge inventorization); b) implementation of the new relavant theory in Delft3D-1D; c) Implementation and improvement of Delft3D-2DV; d) upgrading Delft3D-slurry to main stream Delft3D
3) Verification of the new model against COSIA data.
4) Reporting, model delivery and preparation of a publication

Gerealiseerde 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.
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 COSIA 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).


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 state-of-the-art knowledge in this field. The available knowledge of rheology and sand settling processes will be further developed and included in the model, based on the newly available data. The resulting model will be the single model world-wide with 2D (potentially 3D) prediction capability of these processes.


Project results in terms of software and documentation will be made available via the Deltares Open Source Software site:

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 conferences (e.g. Delft Software Days,

Link naar projectresultaten…