Numerical modelling of the wave interaction with revetment breakwater built on reclaimed coral reef islands in the South China Sea—Experimental verification

Ye, Jianhong; Shan, Jipeng; Zhou, Haoran; Yan, Naixiao

doi:10.1016/j.oceaneng.2021.109325

Cited by 17 publications

(4 citation statements)

References 30 publications

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“…Hydraulic parameters of aquifers play an important role in the studies of hydrological modelling, climate change, and civil engineering, which include, but are not limited to, rainfall infiltration, groundwater resources utilization, groundwater impacts on the climate system, and structural stability (Amanambu et al, 2020; Dunkerley, 2012; Kurylyk et al, 2014; Taylor et al, 2013; Van Dam & Feddes, 2000; Ye et al, 2021). Currently, one of the primary approaches of estimating the hydraulic parameters of an aquifer is the pumping test, which effectively obtains aquifer hydraulic parameters by measuring changes in the water table at the observation point (Butler Jr & Healey, 1998; Raghavan, 2004; Xun et al, 2015).…”

Section: Introductionmentioning

confidence: 99%

Impact of high‐permeability preferential flow zones on pumping‐induced airflow in unconfined aquifer

Shan

Yang

Kuang

et al. 2023

Hydrological Processes

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When the unsaturated zone of the unconfined aquifer is covered by a lowpermeability upper layer, significant airflow will be generated in the unsaturated zone during water pumping. However, high permeability preferential flow zones (PFZs) such as fractures and macropores are frequently present in the unsaturated zone, forming the preferential fluid flow paths, which may change the original airflow pattern in the unsaturated zone during the pumping test and consequently affect the precision of obtained aquifer hydraulic parameters. The main objective of this paper is to investigate the effect of PFZs in low-permeability upper layer on pumpinginduced airflow in the unsaturated zone by numerical simulations of transient threedimensional air-water two-phase flow and to quantify errors in the aquifer hydraulic parameters obtained during pumping test. The results demonstrate that a large amount of air flows quickly from the atmosphere into the unsaturated zone through the PFZs, and that the PFZs can draw some air from the nearby low-permeability soils as well. The significant influx of air through PFZs also reduces the negative air pressure in the unsaturated zone and decreases the drawdown in the saturated zone at intermediate times, which are nevertheless still greater than the results obtained in the homogeneous aquifer. Estimations of the aquifer hydraulic parameters reveal that errors of these parameters obtained are smaller when the PFZs with favourable combinations of permeability, width and quantities facilitate more air to flow into the unsaturated zone. K E Y W O R D S air-water two-phase flow, preferential flow zone, pumping test, two-phase numerical simulation, unconfined aquifer 1 | INTRODUCTION Hydraulic parameters of aquifers play an important role in the studies of hydrological modelling, climate change, and civil engineering, which include, but are not limited to, rainfall infiltration, groundwater resources utilization, groundwater impacts on the climate system, and

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Section: Introductionmentioning

confidence: 99%

Impact of high‐permeability preferential flow zones on pumping‐induced airflow in unconfined aquifer

Shan

Yang

Kuang

et al. 2023

Hydrological Processes

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“…The pore pressure within a seabed is a crucial parameter that directly impacts the design of foundations of marine infrastructures. Evaluating soil characteristics and seabed stability by using pore pressure have practical engineering applications, especially in newly deposited seabeds with soft and in-compact soil, which are prone to instability and low bearing capacity [1,2]. Two wave-induced seabed liquefaction mechanisms, namely oscillatory and residual, have been reported in the literature [3][4][5].…”

Section: Introductionmentioning

confidence: 99%

Integrated Model for Wave-Induced Oscillatory and Residual Soil Response in a Poro-Elastic Seabed: Partially Dynamic Model

Wan

Cui

Jeng

2023

JMSE

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The evaluation of wave-induced residual pore pressure in a porous seabed and associated seabed liquefaction is essential for designing marine infrastructure foundations. The strength and stiffness of the seabed could be weakened due to the build-up of pore pressures under cyclic wave action, further leading to residual liquefaction. Existing models for residual liquefaction are limited to the quasi-static uncoupled approaches, which do not account for the effect of oscillatory pore pressure on the accumulative pore pressure acceleration of solid particles, despite the mutual influence of these two mechanisms. To overcome these limitations, this paper proposes a new model for residual soil response with u−p approximation (partial dynamic model) that couples oscillatory and residual mechanisms. The proposed model is validated through wave flume tests and centrifuge tests. Based on the coupling model, a new criterion of liquefaction integrating both oscillatory and residual mechanisms is also proposed. Numerical examples demonstrate that the coupling effect significantly affects the wave-induced seabed liquefaction potential. Furthermore, a new parameter (Ω) representing the ratio of oscillatory and residual pore pressure is introduced to clarify which mechanism dominates the pore pressure development.

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“…Most of the existing studies primarily focus on analyzing the wave hydrodynamics of fringing reefs under regular waves [6,10], irregular waves [11][12][13], extreme waves [14,15], and tsunami-like waves [16]. Based on the field data, scholars systematically analyzed the wave breaking [17], wave setup, wave-induced current [18,19], and infragravity wave properties [20,21] of fringing reefs.…”

Section: Introductionmentioning

confidence: 99%

Influence of Excavation Pits on the Wave Hydrodynamics of Fringing Reefs under Regular Waves

Wang

Men

et al. 2023

JMSE

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Dredging materials from reef flats have become an important source of sand and aggregates for meeting the infrastructure needs of coral-lined shores in subtropical and tropical regions, especially for low-lying atoll islands. Dredging at the reef flats can generate artificial excavation pits, which not only have profound influences on coral ecological stability but also deeply affect the hydrodynamic characteristics of coral reefs. To deepen the understanding of the influence of excavation on the wave hydrodynamics of fringing reefs, the wave propagation, wave transformation, wave setup, and wave runup processes of regular waves on fringing reefs with artificial pits have been systematically analyzed using a non-hydrostatic numerical wave solver (NHWAVE). The effects of some significant factors have been carefully investigated. According to the study findings, the existence of artificial pits can result in a slight decrease in the wave height around the artificial pit. The time-mean maximum of wave runup height at the backreef slope can be reduced to some extent when the artificial pit is present. When placed close to the reef edge, the artificial pit can have noticeable effects on the hydrodynamic characteristics of fringing reefs, particularly the wave setup along the reef flat. It is hoped that the study findings can provide further reference for evaluation of the influences of artificial pits on the wave hydrodynamics of fringing reefs.

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Numerical modelling of the wave interaction with revetment breakwater built on reclaimed coral reef islands in the South China Sea—Experimental verification

Cited by 17 publications

References 30 publications

Impact of high‐permeability preferential flow zones on pumping‐induced airflow in unconfined aquifer

Impact of high‐permeability preferential flow zones on pumping‐induced airflow in unconfined aquifer

Integrated Model for Wave-Induced Oscillatory and Residual Soil Response in a Poro-Elastic Seabed: Partially Dynamic Model

Influence of Excavation Pits on the Wave Hydrodynamics of Fringing Reefs under Regular Waves

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