Design and performance of headland bays in Chesapeake Bay, USA

Hardaway, C. Scott; Gunn, James R.

doi:10.1016/j.coastaleng.2009.10.007

Cited by 19 publications

(3 citation statements)

References 5 publications

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“…The ability to predict the final form of the beach has applications in understanding the future distribution and timescales over which coastal erosion will occur, or in planning for the influence of coastal interventions on downdrift coastal morphology. Indeed the induction of a crenulate bay morphology may itself be a successful strategy for stabilizing a coastline [ González and Medina , ; González et al , ; Hardaway and Gunn , ]. Yet these empirical expressions are decoupled from the physical processes that drive bay formation and evolution.…”

Section: Introductionmentioning

confidence: 99%

Exploring the sensitivities of crenulate bay shorelines to wave climates using a new vector-based one-line model

Hurst

Barkwith

Ellis

et al. 2015

J. Geophys. Res. Earth Surf.

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We use a new exploratory model that simulates the evolution of sandy coastlines over decadal to centennial timescales to examine the behavior of crenulate-shaped bays forced by differing directional wave climates. The model represents the coastline as a vector in a Cartesian reference frame, and the shoreface evolves relative to its local orientation, allowing simulation of coasts with high planform-curvature. Shoreline change is driven by gradients in alongshore transport following newly developed algorithms that facilitate dealing with high planform-curvature coastlines. We simulated the evolution of bays from a straight coast between two fixed headlands with no external sediment inputs to an equilibrium condition (zero net alongshore sediment flux) under an ensemble of directional wave climate conditions. We find that planform bay relief increases with obliquity of the mean wave direction, and decreases with the spread of wave directions. Varying bay size over 2 orders of magnitude (0.1-16 km), the model predicts bay shape to be independent of bay size. The time taken for modeled bays to attain equilibrium was found to scale with the square of the distance between headlands, so that, all else being equal, small bays are likely to respond to and recover from perturbations more rapidly (over just a few years) compared to large bays (hundreds of years). Empirical expressions predicting bay shape may be misleading if used to predict their behavior over planning timescales.

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Section: Introductionmentioning

confidence: 99%

Exploring the sensitivities of crenulate bay shorelines to wave climates using a new vector-based one-line model

Hurst

Barkwith

Ellis

et al. 2015

J. Geophys. Res. Earth Surf.

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“…They have been widely adopted for harbors and coastal protection ( Uda, 2022 ). Emerged detached rubble mound breakwaters are a prevalent type of coastal protection structures in the United States of America ( Hardaway and Gunn, 2010 ), Europe ( Anfuso et al., 2011 ; Araújo et al., 2014 ; Armaroli et al., 2009 ; Dolphin et al., 2012 ), and Japan ( Sane et al., 2007 ; Uda, 2016 ). Different construction materials used to build them include natural rocks, concrete units, and geotextiles ( Saengsupavanich 2013a , 2013b ).…”

Section: Emerged Breakwatersmentioning

confidence: 99%

Environmental impact of submerged and emerged breakwaters

Saengsupavanich

Ariffin

Yun

et al. 2022

Heliyon

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“…Results from a monitoring program technically provide information on the need for future maintenance and the modification of the project. Nevertheless, the information will be useful for designing future similar structures, so monitoring program is quite common in engineering works worldwide [3]- [10]. In Thailand, many coastal structures have been employed by either public authorities or private sectors during the past half-century.…”

Section: Introductionmentioning

confidence: 99%

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2020

EngJ

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Pranburi Jetties, a pair of long jetties with a length of 800 m and 860 m, have been constructed at the Pranburi River inlet, located on the western coast of the Gulf of Thailand since 1999 to stabilize the river mouth. The purposes of this study were to evaluate the responses of shoreline due to the construction of Pranburi Jetties, and the accuracy of the One-Line model (OLM) on predicting the shoreline change due to construction. Based on the shoreline positions retrieving from aerial photographs and satellite imagery during 1967-2018, the difference in shoreline evolution before and after the construction of the jetties was evaluated using ArcGIS and Digital Shoreline Analysis System. The predicted shorelines using the One-Line model were compared with the image-analyzed shorelines for evaluating the accuracy of the model. The results indicated that the construction of Pranburi Jetties had caused the shoreline accretion at the vicinity of the jetties with the maximum accretion of up to 300 m in 2018. The land growth of 16.2 and 9 ha took place at the northern and southern coasts, respectively. The percentage of errors between the predicted and the imageanalyzed shoreline varied from 2 to 13,000 percent with an average of 250 percent. Misprediction in shoreline change using a numerical model caused unnecessary construction of three detached breakwaters at the northern coast of the jetty.

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Design and performance of headland bays in Chesapeake Bay, USA

Cited by 19 publications

References 5 publications

Exploring the sensitivities of crenulate bay shorelines to wave climates using a new vector-based one-line model

Exploring the sensitivities of crenulate bay shorelines to wave climates using a new vector-based one-line model

Environmental impact of submerged and emerged breakwaters

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