Coastal Sediment Transport Overview

Principles

Definition

Coastal sediment transport is the academic field investigating the processes, forces, and pathways governing the movement of unconsolidated particulate material, such as sand, gravel, and mud, within the dynamic coastal zone stretching from the nearshore seafloor to the dune systems. This research area analyzes the interactions between sediment and driving forces like waves, currents, and tides to understand coastal morphology evolution, predict shoreline changes, and inform coastal engineering and management strategies.

Ontological type

Driving Mechanisms

Engineering Applications

Modeling Approaches

Key developments

Key Figures

Bedform and Energetics era

Leo C. van Rijn [1], associated with Delft University of Technology [3], stands as a central figure in the Bedform and Energetics era. His Sediment Transport, Part I: Bed Load Transport [6] (1984) quantified bed-load transport processes and thresholds, providing a mechanistic link between flow energetics and bedform development that underpins the era. Paul D. Komar [2], affiliated with Oregon State University [4] and the University of St Andrews [5], contributed foundational work during this era. His Threshold of sediment motion under unidirectional currents [7] (1977) and Longshore sand transport on beaches [8] (1970) established critical thresholds and alongshore transport concepts that informed sediment budgets and the mechanistic vocabulary of coastal morphodynamics.

Process-Based Morphodynamics era

Kenneth Pye [1] was active at institutions such as University of Cambridge [3] and University of Copenhagen [4] during the Process-Based Morphodynamics era. His key contribution is GRADISTAT [7], a grain size distribution and statistics package for the analysis of unconsolidated sediments, which standardized grain-size statistics and underpinned morphodynamic analyses in this era. Robert W. Dalrymple [2] was affiliated with Ghent University [5] and Vanderbilt University [6] during this era. His papers include Estuarine facies models; conceptual basis and stratigraphic implications [8], and Dynamics and facies model of a macrotidal sand-bar complex, Cobequid Bay—Salmon River Estuary (Bay of Fundy) [9], which advanced understanding of facies architectures and estuarine dynamics essential for morphodynamic prediction.

Coupled Anthropocene Morphodynamics era

Michalis Vousdoukas[1] is associated with the University of East Anglia[3] and Leibniz University Hannover[4] in the Coupled Anthropocene Morphodynamics era. His key contributions include the 2018 global long-term observations of coastal erosion and accretion[8] and the 2020 analysis of sandy coastlines under threat of erosion[7], which provided essential empirical baselines for coupled morphodynamic frameworks and hazard forecasting in this era. Sergio Fagherazzi[2] is affiliated with Boston University[5] and the University of Padua[6] during this era. His contributions include the 2011 work on numerical models of salt marsh evolution: Ecological, geomorphic, and climatic factors[9] and the 2010 study on a numerical model for the coupled long‐term evolution of salt marshes and tidal flats[10], advancing understanding of eco-geomorphic interactions and long-term marsh dynamics under climate and anthropogenic forcing.