Hydrodynamic Characteristics of Curved-Front Seawall Models Compared with Vertical Seawall under Regular Waves

Anand, K.V.; Sundar, V.; Sannasiraj, S. A.

doi:10.2112/jcoastres-d-09-00169.1

Cited by 24 publications

(3 citation statements)

References 3 publications

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“…Their evolution was driven by the need to reduce seawall height, e.g., from a cost or landscape impact viewpoint, but maintaining efficiency in shore protection, prevention overtopping, and reduction of backwash toe velocity to limit scouring. This is the rationale for the different seawall profiles resulting from numerical equations and physical studies that continue today (Anand, Sundar, and Sannasiraj, 2011). Nevertheless, ''Results from the use of these equations are very approximate at best.…”

Section: The Main Differencesmentioning

confidence: 99%

Canons of Coastal Engineering in the United Kingdom: Seawalls/Groynes, a Century of Change?

Williams

Giardino

Pranzini

2016

Journal of Coastal Research

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Section: The Main Differencesmentioning

confidence: 99%

Canons of Coastal Engineering in the United Kingdom: Seawalls/Groynes, a Century of Change?

Williams

Giardino

Pranzini

2016

Journal of Coastal Research

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“…Curved seawalls (Figure 1b): The curved design of these seawalls reduces wave overtopping and redirects wave energy due to waves breaking back in a seaward direction [21]. The curved-face of the structure attenuates wave energy resulting in lower stress magnitudes [22]. Failure analysis reveals that curved seawalls are more stable and perform better during dynamic loading when compared to vertical walls [23].…”

Section: Introductionmentioning

confidence: 99%

Concrete Seawalls: Load Considerations, Ecological Performance, Durability, and Recent Innovations

Hosseinzadeh¹,

Ghiasian²,

Andiroglu³

et al. 2021

Preprint

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Increasing frequency of extreme weather events, driven by climate change, has resulted in an increasing demand for coastal structures to protect and stabilize shorelines. Concrete seawalls are a common category of coastal protection structures, designed with the primary objectives of absorbing wave action, preventing coastline erosion, and alleviating flooding. Much research has been carried out on improving the seawall performance. This work is a review of the current state-of-the-art in concrete seawalls focusing on design aspects including wave loading and innovative seawall designs, ecological considerations, and durability aspects. Wave loads on seawalls have received significant attention; however, their quantification remains a challenging task especially for novel designs. Drawing inspiration from natural shorelines, modification of surface complexity at a multitude of scales can improve the otherwise poor ecological performance of seawalls. The corrosion of the steel is a major durability concern, and the use of non-corrosive reinforcement can increase seawall durability towards corrosion. Examples of innovative seawall designs and systems which have the capability to outperform conventional seawalls are discussed. Advances in structural design, ecological engineering, and infrastructure materials science will drive the development of multi-functional seawalls which are sustainable, durable, and resilient.

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“…Among coral species that were transplanted on seawalls, branching and plating corals did not seem to survive well [17,19], while transplants of massive species on both subtidal [17,30] and intertidal seawalls [19] were observed to survive better than their branching counterparts. Greater fluctuations in environmental parameters such as temperature [31,32] and wave motion [33,34] in the vicinity of seawalls appear to be more stressful to branching corals. Recent studies have shown that more massive species were found naturally on seawalls than branching species [8,35,36].…”

Section: Introductionmentioning

confidence: 99%

Transplanting Coral Fragments in Close Contact Enhances Their Survival and Growth on Seawalls

Kikuzawa

Sam

et al. 2021

JMSE

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Accelerated urbanisation has replaced many natural shorelines with coastal defences, resulting in the loss of natural habitats. However, structures such as seawalls can support some biotic assemblages, albeit of lower species richness. Ecological engineering techniques such as coral transplantation can enhance biodiversity on these artificial structures, but its success is circumscribed by high costs. Little is known about the fusion of discrete coral colonies that could potentially improve coral transplantation success on seawalls, particularly for the slow-growing massive species that are generally well-adapted to living on seawalls. Here, we investigated the feasibility and cost-effectiveness of transplanting Platygyra sinensis on seawalls by comparing the survivability and growth of fragments transplanted adjoining with those transplanted further apart. Fragments (approximately 3 cm diameter; n = 24) derived from three individuals were randomly grouped into two treatments, transplanted at 0.5 cm and 5 cm apart. Fragments in the former treatment came into contact with each other after three months. We observed that in all cases, the contact zones were characterised by a border of raised skeletal ridges without tissue necrosis, often termed nonfusion (=histoincompatible fusion). The adjoining transplants showed better survival (75 vs. 43%) and grew at a rate that was significantly higher than fragments transplanted 5 cm apart (3.7 ± 1.6 vs. 0.6 ± 1.1 cm2 month−1). Our projections demonstrated the possibility of reducing transplantation cost (USD cm−2) by 48.3% through nonfusion. These findings present nonfusion as a possible strategy to increase the overall cost-effectiveness of transplanting slow-growing massive species on seawalls.

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Hydrodynamic Characteristics of Curved-Front Seawall Models Compared with Vertical Seawall under Regular Waves

Cited by 24 publications

References 3 publications

Canons of Coastal Engineering in the United Kingdom: Seawalls/Groynes, a Century of Change?

Canons of Coastal Engineering in the United Kingdom: Seawalls/Groynes, a Century of Change?

Concrete Seawalls: Load Considerations, Ecological Performance, Durability, and Recent Innovations

Transplanting Coral Fragments in Close Contact Enhances Their Survival and Growth on Seawalls

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