Graduation of Roel de Goede

06 February 2020 15:30 till 16:30 - Location: Room 1.98, Faculty of Civil Engineering and Geosciences - By: Webredactie

"Regime shift in sediment concentrations in the Loire estuary." | Professor of graduation: Prof. dr. ir. Z.B. Wang, supervisors: Dr. ir. B.C. van Prooijen (TU Delft), dr. ir. Y.M. Dijkstra (TU Delft).

A study of five European estuaries by Winterwerp and Wang (2013) shows that tidal ranges increased significantly along with the ongoing narrowing and deepening of these estuaries. Next to an increase in tidal range, dramatic increase in suspended sediment concentrations has been observed in the Ems (Germany) and Loire (France) estuaries, often referred to as a regime shift towards hyperturbid state. While it is generally accepted that the increase in tidal range is a consequence of deepening and narrowing, I investigated  whether deepening also is a potential cause for the high sediment concentrations observed in the Loire. This included an extensive model study to understand the behaviour of the present-day system, as well as the behavioural changes over time. If you are curious about my findings regarding the effects of deepening, you are cordially invitited to my presentation.