Coastline development

This is a draft page

Introduction

In this tool (coastline dynamics) you can compute alongshore sediment transports and shoreline dynamics.
The tool requires a shoreline, cross-shore profile and a wave climate (you can inspect the generic data availability in the top panel of the tool).
Breakwaters will also be used, fully blocking alongshore transports when computing shoreline dynamics.

Alongshore transports are based on either the Kamphuis or CERC alongshore transport formula.
Shoreline dynamics are computed through alongshore transport gradients based on shoreline orientation on a staggered 1-dimensional coastline grid.
Transport gradient give rise to shoreline changes, which in turn results in changing alongshore transports.
Note that the following processes are not included: shadow zoning, alongshore varying wave climates, by-passing, etc.
Results in terms of alongshore transports and coastline dynamics should therefore be interpreted with a considerable range uncertainty.

Please be aware that the speed of this tool scales:

Kwadraticly (!) with dx (based on distance of coast and/or number of points N)
Linearly with with the maximum sediment transport in the S-phi curves (non-linearly with Hs and Tp)
Linearly with the number of wave conditions
Linearly with the active height
Linearly with the duration of the computation

E.g.: when increasing both the number of gridpoints and the run-period by a factor 2, the computation will take 8x longer (!)

How to use the tool

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Examples