The following special sessions or symposia were organized by SEDITRANS during international conferences:

1. The session GM1.6/HS9.9/SSP3.1.13 "Granular Mechanics in the Geomorphological Context" was organised by Francesco Ballio (Politecnico di Milano) and Rui M.L. Ferreira (Instituto Superior Técnico), who is a SEDITRANS scientist, at the General Assembly of the European Geosciences Union (EGU), Vienna, 13th April 2015 (meetingorganizer.copernicus.org/EGU2015/orals/17889). It represented an effort to communicate the results of two EU-funded Marie Curie ITNs "HYTECH" (ITN-Marie Curie FP7-PEOPLE-2013-ITN-316546) and "SEDITRANS (ITN-Marie Curie FP7-PEOPLE-2013-ITN- 607394), both promoting research on a wide a range of topics involving sediment transport and its applications. The session was composed of 18 contributions, which earned it space for both oral and poster slots. Four of these contributions were originated by members of SEDITRANS. The oral session (6 communications, 90 minutes) took place at a medium sized room (G2) at the conference centre and was attended by more than 150 conference registered participants. 10 posters were shown in the "blue poster" hall of the conference centre with unlimited attendance for 90 minutes. Lively questions-answers debates were followed by discussions among interested scientists and members of SEDITRANS, making this a relevant event to promote the research performed in SEDITRANS and to underline the pertinence of its objectives.

2. “Experimental sedimentology, grain interaction and granular mechanics”, Session SSP3.1/GM3.6/HS11.24 during the European Geosciences Union General Assembly 2016, Vienna, Austria. Conveners: Lucy Clarke; Francois METIVIER, Pauline Leduc, Laure Guerit, Francesco Bal lio, Guilhem Amin Douillet, Rui M.L. Ferreira (of SEDITRANS), Jochen Aberle, Mário J Franca (of SEDITRANS), Katalin Gillemot. This session features contributions on laboratory experiments and numerical approaches that contribute to the development of knowledge in sedimentology, stratigraphy, morphodynamics and mechanics of granular material. The session consisted of 36 papers; 5 from SEDITRANS researchers and 31 outside the network.

3. Sessions during the M.S. YALIN MEMORIAL COLLOQUIUM 2015 “Fundamental river processes and Connection between fluvial and coastal systems in a changing climate”, Palermo. Italy. The Colloquium paid special attention to fundamental processes in rivers and interconnections between fluvial and coastal morphodynamics in a changing climate. The main organizer was Prof. Donatella Termini, from the University of Palermo. Two SEDITRANS scientists, Rui M.L. Ferreira and Vincenzo Armenio, were actively involved in the organization brought to the sessions the agenda of SEDITRANS. The colloquium consisted of 26 papers; 5 from SEDITRANS researchers and 21 outside the network.

4. “Buoyancy-driven flows”, Special Session S11 during the Eighth International Conference on Fluvial Hydraulics (River Flow 2016), St. Louis (Mo), USA. Organizers: C. Adduce, University of Rome Tre, Italy, and M. Franca (of SEDITRANS), EPFL, Switzerland. This session was open to all types of environmental and manmade flows where the driving force is buoyancy, and where the difference in density originating the flows can be due to particles in suspensions, temperature or diluted species. The session consisted of 12 papers; 1 from SEDITRANS researchers and 11 outside the network.

5. “Buoyancy-Driven Flows”, Thematic workshop S3 during the 4th IAHR Europe Congress, Liege, Belgium, 27-29 July 2016. Conveners: Prof. Claudia Adduce (University of Roma Tre) & Dr. Mario Franca of SEDITRANS (EPFL). This session was open to all types of environmental and manmade flows where the driving force is buoyancy, and where the difference in density originating the flows can be due to particles in suspensions, temperature or diluted species. The session consisted of 8 papers; 0 from SEDITRANS researchers and 8 outside the network.

6. “Sediment Transport in the Coastal and Deep Sea Environment”, Mini-Symposium organized by Athanassios Dimas and Benoit Spinewine of SEDITRANS during the 26th International Ocean and Polar Engineering Conference (ISOPE 2016), Rhodes, Greece, 27 June 2016. The symposium consisted of 12 papers; 6 from SEDITRANS researchers and 6 outside the network. Apart from the authors, the symposium was attended by about 30 persons.

7.      “Sediment Transport and Coastal Erosion”, Session organized by Athanassios Dimas of SEDITRANS during the 27th International Ocean and Polar Engineering Conference (ISOPE 2017), San Francisco, USA, 25-30 June 2017. The session symposium consisted of 6 papers; 2 from SEDITRANS researchers and 4 outside the network. Apart from the authors, the symposium was attended by about 25 persons.