Damping of ship-induced primary waves
Damping ship-induced primary waves in rivers by modifying groynes with the aim of increasing fauna habitat quality
R. Pasman (TU Delft - Civil Engineering & Geosciences)
J. Bricker – Mentor (TU Delft - Hydraulic Structures and Flood Risk)
Ralph M.J. Schielen – Graduation committee member (TU Delft - Rivers, Ports, Waterways and Dredging Engineering)
Erik Mosselman – Graduation committee member (TU Delft - Rivers, Ports, Waterways and Dredging Engineering)
W.S.J. Uijttewaal – Graduation committee member (TU Delft - Environmental Fluid Mechanics)
A.J. van der Hout – Graduation committee member (TU Delft - Rivers, Ports, Waterways and Dredging Engineering)
Freek Huthoff – Graduation committee member (HKV Lijn in Water)
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Abstract
Ships in rivers create waves and these can have a negative impact on fish habitats along the river banks. A modelling study is carried out to investigate how these ship-induced waves can be damped in groyne fields by making structural modifications to the groynes. For this purpose, different types of openings (notches) are applied to the groynes. Next, hydro-ecologic indicators are used to assess the impact of notching of groynes on fish habitat suitability. The results suggest that relatively simple modifications can significantly improve the ecological value of the groyne fields.