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Experiments by Invited Researchers

 

ESDODDS: Experiments on Sediment Depth Of Disturbance (DoD) for beaches under the influence of Drainage Systems

Project acronym: HyIII-FZK-05
Name of Group Leader: Paolo Ciavola, University of Ferrara
User-Project Title: ESDODDS: Experiments on Sediment Depth Of Disturbance (DoD) for beaches under the influence of Drainage Systems
Facility: Large Wave Flume, GWK
Proceedings TA Project: Esdodds: experiments on sediment depth of disturbance for beaches under the influence of drainage systems
Data Management Report: There is no Data Management Report available for this project

User-Project Objectives

Summary:

The Objectives of the ESDODDS – project are:

  • Conducting a detailed series of laboratory experiments to determine the Depth Of Disturbance (DoD) under varying beach and wave conditions
  • Analysing in detail the relevant parameters controlling DoD including the influence of a drainage system on the beachface
  • Developing a data set for use in the future development of numerical models to predict DoD
  • Developing a laboratory conceptual model of DoD for field validation purposes
  • Applying the knowledge to develop a model that can be used to assist in the design of beach drainage systems around the world, over a range of beach slopes and grain sizes
  • To understand patterns of sedimentation in the swash-zone and relate them to swash characteristics

All tests in the GWK were performed jointly in co-operation with the project HyIII-GWK-6. In addition to the wave and current characteristics measured using wave gauges and electro-magnetic current meters, during the tests beach morphology changes and DoDs were recorded. Time series of breaking wave heights were measured by using pressure transducers. In addition to the beach profile measurements using a comprehensive array of rods in the swash zone, further data on bed elevation changes were obtained by using two altimeters.

To discriminate the complex sedimentation pattern over and outside the drained area the cooperation with the parallel project HyIII-GWK-6 is required to understand the efficiency of the drains.

The experiments have produced a dataset of DoD and swash zone bed evolution which is of interest for morphological studies. Further work will compare empirical formulae developed by the authors using field observations with the laboratory measurements. Additional information on wave-towave bed changes will be compared with lower frequency changes of bed morphology and slope. Finally, bed erosion/sedimentation will be related with swash characteristics (e.g. velocities and asymmetries).

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