Aeolian transport on beach based on field measurement on the Dutch coast

Aeolian transport on beach based on field measurement on the Dutch coast

Coquet, M.A.J.P.

Stive, M.J.F. (mentor)
Uijttewaal, W.S.J. (mentor)
Arend, S.M. (mentor)
De Vries, S. (mentor)

Civil Engineering and Geosciences

Hydraulic Engineering

Coastal Engineering

2010-06-20

During the winter 2009, beach and dune nourishments have been executed at Vlugtenburg (Holland coast) in order to reinforce the coastal defense. Natural processes such as wind and waves are expected to take care of effective and efficient redistribution of the sand throughout the system. The present study is part of the sub-project Monitoring Program Delfland Coast which main goal is to provide measurement data for process-based modeling of the interactions between the foreshore and the dunes. Based on field measurement realized in November 2009, this MSc thesis aims to find an efficient procedure to monitor the aeolian transport (transport by the wind) of sediment over a beach. These measurements involved innovative devices and methods. Four saltiphones were deployed at different locations on the beach. A forced deposition area was build up and the deposited volumes were monitored using a laser scanner. An analysis of the problems to use formulas derived from wind tunnel experiments in the modeling of transport on the field is carried out. It is followed by the derivation of a model describing the relation between the transport measured with saltiphones and the wind speed for specific conditions. However, no relation is derived between the transport measured with saltiphones and volumes transported and an extrapolation of the model to the whole beach remains incomplete. Finally, the existences of a fetch effect and a cross-shore decrease of the transport are measured, though not accurately quantified.

field study
aeolian transport
saltiphone
Bagnold’s equation
fetch effect
laser scanner
Delfland coast

http://resolver.tudelft.nl/uuid:32307352-0baa-48b1-9167-c1699c0c2fd3

Student theses

master thesis

(c) 2010 Coquet, M.A.J.P.