12th International SedNet Conference (online) 28 June – 2 July 2021

“Sediment Challenges and Opportunities due to Climate Change and Sustainable Development” 

in partnership with BRGM and the Hauts-de-France Region


Simultaneous event with I2SM 7th International Symposium on Sediment Management


SedNet had planned to organise its 12th international conference in Lille, France. But due to sanitary and travel restrictions related to COVID19, we were forced to organize the event online.

Although we had looked forward to meeting all participants live in Lille, the online event proved to be a very acceptable alternative. The conference-website was user friendly, the participants liked the replay-function of presentations, which made it possible to watch them (again) at a later moment.

During the conference, participants could meet others at so-called networking tables, to discuss a specific presentation or conference-session. These networking tables were well used.

169 sediment-professionals participated in the conference. In addition, the 106 participants of the I2SM conference were given access to the SedNet conference.

The following sessions were held:

  • Opening and Welcome (Joint Session with I2SM)
  • Circular Economy
  • Sediment Assessment and Management – Concepts and Policies
  • Impacts of Disturbed Sediment Continua and Mitigation Measures
  • (Re)Using Sediment to Create, Keep or Restore Habitats
  • Sediment in Coastal-Marine Management and EU Strategies
  • How to Deal with Emerging Substances / PFAS / Microplastics
  • Climate Change and Sediments: Direct and Indirect Consequences and Opportunities
  • Closing Session: summary, JSS Special Issue, winner of SedNet Poster Award

A special issue of JSS (the Journal of Soils and Sediments) based on a number of presentations at the SedNet conference, is scheduled to be published in the course of 2022. Would you like to submit a paper of your presentation? See for details the item on the “News” webpage.


The winner of the SedNet Poster Award 2021 is Alizée Lehoux, with the poster “Extreme gas production from fibrous sediments – a potential overlooked greenhouse gas source”.
Congratulations to Alizée!



One conference day was dedicated to online-excursions. Videos were provided about miscellaneous (EU) research projects, pilots, dredging works, technologies and sampling and classification methods.

To give you a glimpse of the event, you can have a look at the summary & conclusions presentation of the Closing Session.

The videos of presentations, the abstracts and posters can be accessed by participants on the conference website (www.sednetconference21.org) until end of October 2021.
Pdfs of most (poster) presentations and abstracts are publicly available here.

Final conference programme
Call for Abstracts (incl. description of thematic sessions)
List of participants