Headland-Bay Beaches

Hsu, John R. C.; Lee, Jung L.; Klein, Antonio H. F.; González, Mauricio; Medina, Raúl

doi:10.1142/12026

Cited by 8 publications

(6 citation statements)

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“…The coastline then appears angular, linear, and even hexagonal due to the single-event factor of cooling volcanic rock combined with megaclasts of unknown origin (McKenna, Jackson, and Cooper, 2011). Differing morphology at different scales is an unavoidable feature in many other coastlines, such as a logarithmically curved beach made of angular sand grains (Hsu et al, 2021) or a straight seawall made of circular driven logs.…”

Section: Resultsmentioning

confidence: 99%

The Coastline Paradox: A New Perspective

McNamara

Silva

2022

Journal of Coastal Research

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The coastline paradox, which suggests that coastlines have indefinite lengths, is a widespread and misleading concept that has endured in scientific literature for over 50 years. This paper argues that the length of a coastline is real and finite. The measurement of coastlines allows for the quantification of coastline dynamics and engineering responses to these changes. The real difficulties in measuring sometimes complex coastal shapes have taken the appearance of an unreal impossibility. The paradox is resolved using three methods. The first examines definitions used to establish the features to which ''coastline'' refers. The second applies these definitions to the measurement of real coastlines. Finally, a geometrical analysis is carried out to resolve the paradox mathematically. The purpose of this paper is to help resolve the paradox and reduce confusion surrounding the topic, which will be of direct use for coastal communities and planners to assess and respond to coastline changes and sea-level rise.

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Section: Resultsmentioning

confidence: 99%

The Coastline Paradox: A New Perspective

McNamara

Silva

2022

Journal of Coastal Research

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“…In addition to the ocean dynamics shaping the topography of the coastal zone, the aeolian activities can not be ignored. When scholars talk about the causes of coastal erosion in Japan and Australia, they also mention that coastal dunes can provide sediments for beaches as transport corridors, and once the transport paths are blocked, erosion and siltation will occur (Bird, 1996;Uda, 2010;Hsu, 2021).…”

Section: Sediment Budget Imbalance-by the Year 2021mentioning

confidence: 99%

Study on coastal sediment budget imbalance in cells resulted from land cover change in the savanna desertification area, west Hainan Island (China)

Luo

Jin

Wang

et al. 2023

Preprint

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Based on the superior natural environment of the coastal zone, the construction of the coastal zone has developed rapidly in recent years. In order to better adapt to the coastal zone and protect the coastal zone resources, we need to fully understand the sedimentary dynamic environment of the coastal zone, so this study was carried out. In this paper, the data of geographical environment and climatic factors in the study area are collected. Field observation was carried out in the study area, with satellite image analysis and software simulation, detailed studies were made on the evolution process of the shoreline, the stability of the shoreline and the sediment level in the last 20 years. On this basis, the conceptual model of sediment transport is presented, and the coastal dune can be used as a transport engine to drive sediment migration between coastal cells and maintain the stable development of the coastal area. Under the same dynamic conditions, once the engine is turned off, such as forest replacing natural coastal dunes, the sediment transport path is blocked, which will cause accretion of the upstream flank and erosion of the downstream flank. Human beings tend to change the natural environment for their own interests, and the feedback mechanism of the natural environment is often characterized by hysteresis effect, which is not worth the loss in the long run. We should respect nature and reduce unnecessary environmental damage.

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“…On a coast subject to strong wind action, foreshore sand may be transported to the hinterland, causing damage to the houses and coastal roads along the coastline. When a detached breakwater or an artificial reef (submerged breakwater) is constructed as a measure against beach erosion on such a coast, sand accumulates in the lee of the structure owing to its wave-sheltering effect, forming a salient [1]. In Japan, detached breakwaters have been widely used as a shore protection measure against beach erosion.…”

Section: Introductionmentioning

confidence: 99%

Numerical Simulation on Sand Accumulation behind Artificial Reefs and Enhancement of Windblown Sand to Hinterland

Yokota¹,

Uda²,

Noshi³

2023

Numerical Simulation - Advanced Techniques for Science and Engineering

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Salients were formed in the lee of two artificial reefs (submerged breakwaters) constructed on Kimigahama Beach in Chiba Prefecture, Japan, owing to the wave-sheltering effect of the reefs, and then, a significant amount of fine sand was transported inland from the salients by wind action. In this study, not only shoreline changes after the installation of the two artificial reefs but also beach changes caused by windblown sand were predicted using a model, in which the BG model (a model for predicting three-dimensional beach changes due to waves based on Bagnold’s concept) is combined with a cellular automaton method. Reproduction calculation was carried out on the basis of field data. Beach changes after the artificial reefs were removed were also predicted and the effect of beach nourishment was investigated. It was concluded that landward sand transport by wind is accelerated when wave-sheltering structures such as an artificial reef are constructed on a coast composed of fine sand, and such an effect can be successfully predicted by using the present model.

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Headland-Bay Beaches

Cited by 8 publications

References 0 publications

The Coastline Paradox: A New Perspective

The Coastline Paradox: A New Perspective

Study on coastal sediment budget imbalance in cells resulted from land cover change in the savanna desertification area, west Hainan Island (China)

Numerical Simulation on Sand Accumulation behind Artificial Reefs and Enhancement of Windblown Sand to Hinterland

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