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For a subset of global deltas, morphologic … For a subset of global deltas, morphological evolution is due to the competing actions of the river, which brings about the delivery of terrestrial sediment, and waves, which redistribute the input sediment across the coastline. Given that there are many such coastlines where waves exert considerable influence worldwide, an improved understanding of the effect of waves on the morphological evolution of coastal delta settings is imperative, especially in view of the perceived declining influence of the river input. Accordingly, this study presents a preliminary numerical model approach applied to investigate the planform evolution of deltaic coastlines due to the interplay between flow discharge and waves. Model simulations were undertaken with the coupled Delft3D and SWAN (Simulating Waves Nearshore) numerical models for fluvial and wave input, respectively. Additionally, the idealized numerical model represents a straight, sandy deltaic coastline interrupted by two fluvial discharge outlets, and, at the same time, affected by waves approaching from a dominant direction. We found that the modelled deltas evolved into diverse shoreline - and - river–mouth forms under varying combinations of wave and river inputs. The modelling approach also makes a preliminary distinction between the relative effects of waves’ significant height (Hs) and incidence angle (αo) on deltaic planform morphological evolution. Future development of the model will focus on critically exploring the interaction between these two key morphodynamic processes along similar natural coastline settings. along similar natural coastline settings. +
A first look at the dynamic interaction between waves and flow discharge through twin-deltaic channels with a coupled model +
Southampton +
mra1u19@soton.ac.uk +
Matthew +
University of Southampton +
Afolabi +
07438475930 +
CSDMS_023_MAfolabi.pdf +
Image:CSDMS_023_MAfolabi.png +
4) LSDtopotools +
1) Introduction to Landlab +
1) How to Route Flow in a Landscape with Landlab? +
United Kingdom +
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09:17:33, 23 February 2023 +
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22:21:28, 25 May 2023 +
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