The Response of Spit Shapes to Wave-Angle Climates

Ashton, Andrew D.; Murray, A. Brad; Littlewood, R. C.

doi:10.1061/40926(239)27

Cited by 10 publications

(10 citation statements)

References 14 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Spits are ubiquitous throughout the world and highly common in the Europe and Asia mainland (29 of 79 examples), particularly along the coasts of France, the British Isles, and Denmark (Figure 9). Flying spits are less common, but good examples exist in the Sea of Azov (Zenkovich, 1967) and Long Point and Presque Isle in Lake Erie (Ashton et al, 2007). Tombolo and cuspate foreland are common along the coasts of the Oman and Persian Gulfs and along the East Coast of the United States.…”

Section: Towards a Geomorphic Classification Of Beach‐ridge Systemsmentioning

confidence: 99%

“…Abrupt rotation between successive beach-ridge sets of cuspate forelands may be attributed to reversals in direction or the magnitude of longshore transport (Hesp et al, 2016). Also, changes in wave climate (particularly wave angle approach), will modify the spit orientation and hence of beach-ridge sets because of truncations processes (Ashton et al, 2007). The prevalence of one direction may significantly alter the previous pattern of alongshore growth of the spit.…”

Section: Beach-ridge Setsmentioning

confidence: 99%

See 1 more Smart Citation

Contrasting beach‐ridge systems in different types of coastal settings

Isla

Moyano‐Paz

FitzGerald

et al. 2022

Earth Surf Processes Landf

View full text Add to dashboard Cite

Beach-ridge systems are geomorphological features common in every type of coast and have been widely interpreted as geo-archives of past sea-level, climatic, or tectonic changes. These relict morphological elements are well-known by their facies, architecture, stratigraphy, and evolution. However, the coastal context where beach ridges are formed has never been evaluated. Coastal beach-ridge systems were classified into four main types corresponding to deltaic strandplains, non-deltaic strandplains, spits, and barrier islands. Our study consisted of three scales of analysis:(1) the entire beach-ridge system; (2) beach-ridge sets; and (3) individual beach ridges.Several beach-ridge systems having formed in different types of coastal settings are compared by their present characteristics. Geomorphic data generated from processing and interpreting satellite images combined with previous studies are used to quantify multi-scale attributes of beach-ridge systems. These attributes include the area, length, width, number of sets, number of ridges per set, set rotation, ridge spacing, and ridge elevation. Our findings demonstrate that significant differences define beach-ridge systems including deltaic strandplains, large non-deltaic strandplains, small non-deltaic strandplains, large spits (cuspate forelands), small spits (flying spits, bay-mouth spits and tombolos) and barrier islands. A more comprehensive characterization of the factors controlling beach-ridge variability will improve our ability to recognize the sedimentary record of ancient of these systems. The proposed basic platform can be used to isolated different beach-ridge types and systems to facilitate future process and morphodynamic studies.

show abstract

Section: Towards a Geomorphic Classification Of Beach‐ridge Systemsmentioning

confidence: 99%

Section: Beach-ridge Setsmentioning

confidence: 99%

Contrasting beach‐ridge systems in different types of coastal settings

Isla

Moyano‐Paz

FitzGerald

et al. 2022

Earth Surf Processes Landf

View full text Add to dashboard Cite

show abstract

“…From a geologic perspective, the case would be most representative of a coast approaching the terminus of a spit or island. Accretion of the spit or island end is accompanied by erosion along the updrift flank (Ashton et al []). Such a situation differs from long, straight barrier islands and embayed coasts that, over geologic time, tend toward equilibrium shoreline shapes, where alongshore transport gradients (and often alongshore sediment transport itself) tend toward zero.…”

Section: Data and Simulationsmentioning

confidence: 99%

Optimal Responses to Shoreline Changes: An Integrated Economic and Geological Model With Application to Curved Coasts

Jin

Ashton

Hoagland

2013

Natural Resource Modeling

Self Cite

View full text Add to dashboard Cite

The placement of sandy fill on an eroding beach, also known as “beach nourishment,” is a soft‐structure response to property loss often undertaken by coastal property owners. Here, we examine optimal beach nourishment along a curved shoreline with a model that couples geomorphic shoreline evolution with human responses to that evolution. The model includes the exogenous effects of shoreline recession due to sea‐level rise and the endogenous shoreline changes due to gradients in alongshore sediment transport. Human responses (nourishments) to shoreline changes that are not constant along the coast will change the shoreline curvature, thereby influencing local rates of shoreline change. We examine the net benefits of two alternative strategies to undertake soft structural responses to erosion: (i) the decisions of property owners to respond independently and (ii) the decisions of property owners to coordinate their individual responses. Under plausible parameterization, we find that a strategy to coordinate can dominate a strategy to act independently, and the benefits of coordination increase with greater shoreline curvature. This integration of economic and geological models demonstrates how feedbacks between human activities and natural processes can affect the evolution of the shoreline.

show abstract

“…They also investigated the growth of spit subjected to waves from a single high angle (Petersen et al, 2002). Recently, Ashton et al (2007) studied the response of the spit shape to wave angle climate and suggest, through a unified model for spit extension, that distinction such as 'drift-' and 'swash-alignment' may not be of fundamental importance as swash-aligned areas may grade into drift-aligned areas. They further demonstrate that alongshore sediment in the same wave climate alone can result in a coast where the spits to trend towards an orientation dramatically different than that of open coast.…”

Section: Introductionmentioning

confidence: 98%