Ikha Magdalena
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View article: Analytical and numerical investigation of wave resonance over rectangular basin with submerged triangular breakwaters
Analytical and numerical investigation of wave resonance over rectangular basin with submerged triangular breakwaters Open
View article: A coupled Nonlinear Shallow Water Equations — Exner approach for wave–sediment interplay in hybrid coastal defense
A coupled Nonlinear Shallow Water Equations — Exner approach for wave–sediment interplay in hybrid coastal defense Open
View article: A Numerical Simulation of Diffusion-Convection Problems in Heterogeneous Media with a Point Source
A Numerical Simulation of Diffusion-Convection Problems in Heterogeneous Media with a Point Source Open
In this paper, some time-independent diffusion-convection problems in anisotropic media are considered. To study the problems, the governing equation of the problems is transformed into a diffusion-convection equation in a homogeneous isot…
View article: Numerical Model for Wave Attenuation by Breakwater and Trench
Numerical Model for Wave Attenuation by Breakwater and Trench Open
This study presents a numerical and analytical investigation of wave attenuation induced by coastal structures, specifically breakwaters and trenches, using the one-dimensional linearized Shallow Water Equations (SWE). An analytical expres…
View article: Numerical Model for 1D–2D Pollutant Transport Problems
Numerical Model for 1D–2D Pollutant Transport Problems Open
This study presents a numerical model for simulating one- and two-dimensional pollutant transport using a Compact Finite Difference and Forward Time Centered Space (FTCS) scheme. The advection-diffusion equation, which governs pollutant di…
View article: Resonance Phenomena in a Semi-Closed Basin with Two Regions of Wooden Fences
Resonance Phenomena in a Semi-Closed Basin with Two Regions of Wooden Fences Open
This study investigates wave resonance phenomena in a semi-closed rectangular basin equipped with two porous wooden fences. These fences act as partially permeable structures and are modeled by modifying linear shallow water equations (LSW…
View article: Crank–Nicolson Method for the Chiral nonlinear Schrödinger Equation
Crank–Nicolson Method for the Chiral nonlinear Schrödinger Equation Open
In this paper, we develop a finite difference scheme based on the Crank–Nicolson method for solving the chiral nonlinear Schrödinger (CNLS) equation, which describes the dynamics of nonlinear wave propagation with chirality effects. The CN…
View article: THE EFFECTS OF SEASONAL MONSOON AND COASTAL DEFENCE STRUCTURES ON LITTORAL TRANSPORT OFF THE TERENGGANU COAST (MALAYSIA)
THE EFFECTS OF SEASONAL MONSOON AND COASTAL DEFENCE STRUCTURES ON LITTORAL TRANSPORT OFF THE TERENGGANU COAST (MALAYSIA) Open
Maintaining natural sandy shoreline behaviour following human intervention is quite challenging. Anthropogenic activities have disrupted sediment transport, leading to insufficient sediment supply, causing a loss of natural beach character…
View article: Shoreline change assessment due to coastal structure development: A case study of Plumbon Estuary, Central Java, Indonesia
Shoreline change assessment due to coastal structure development: A case study of Plumbon Estuary, Central Java, Indonesia Open
Plumbon Estuary shoreline erosion have been a serious problem since early 2000’s. Several mitigations have been implemented to sustain wave abrasion and tidal erosion such as rubble mound. However, the shoreline changes still occur as the …
View article: Wave resonance reduction over a linear transition bottom with a submerged porous breakwater
Wave resonance reduction over a linear transition bottom with a submerged porous breakwater Open
View article: Numerical Solutions of DCR Problems for Anisotropic FGMs of Spatio-Temporal Dependent Properties and a Source Inclusion
Numerical Solutions of DCR Problems for Anisotropic FGMs of Spatio-Temporal Dependent Properties and a Source Inclusion Open
A combined Laplace transform (LT) and domain-boundary element method (DBEM) are utilized to obtain numerical solutions for an unsteady spatio-temporal coefficient diffusion-convection-reaction (DCR) equation with arbitrary initial conditio…
View article: SWE-Exner model for evaluating the effectiveness of organic coastal defense in trapping mud and absorbing waves
SWE-Exner model for evaluating the effectiveness of organic coastal defense in trapping mud and absorbing waves Open
View article: Analytical and Computational Methods for Optimizing Gabion-Pile Coastal Structures
Analytical and Computational Methods for Optimizing Gabion-Pile Coastal Structures Open
Wooden or bamboo fences, commonly used for coastal protection, have limited effectiveness in reducing wave height due to their porous structure, which provides only moderate wave damping. To address this issue, our study proposes a modific…
View article: Wave shoaling and its interaction with mangrove
Wave shoaling and its interaction with mangrove Open
This study investigates wave shoaling phenomena and its interaction with mangroves. We propose a numerical model based on shallow water equations, consisting of two equations: mass conservation and momentum balance. We will modify the equa…
View article: Experimental and numerical evaluation of tsunami wave reduction through the implementation of sea dikes and trenches
Experimental and numerical evaluation of tsunami wave reduction through the implementation of sea dikes and trenches Open
A tsunami is a sequence of ocean waves that can occasionally cause water to surge onto land at heights of more than 100 feet (30.5 meters). When these water walls break ashore, they have the potential to do extensive damage to the surround…
View article: Analytical and numerical studies of wave attenuation using mangroves and submerged breakwaters for coastal protection
Analytical and numerical studies of wave attenuation using mangroves and submerged breakwaters for coastal protection Open
This research investigates the effectiveness of mangroves and submerged breakwaters in mitigating wave energy and protecting coastal areas. Mangroves, with their dense root systems, and submerged breakwaters, which disrupt wave patterns, s…
View article: The effectiveness of the combination of breakwater and trench in reducing waves
The effectiveness of the combination of breakwater and trench in reducing waves Open
Coastal areas are increasingly threatened by climate change, leading to rising sea levels and more intense storms that accelerate erosion and damage coastal infrastructure. This study investigates a novel approach to coastal protection by …
View article: Impacts of a growing population on the coastal environment of the Bay of Bengal
Impacts of a growing population on the coastal environment of the Bay of Bengal Open
The Bay of Bengal has been at the heart of human civilisation and trade for many centuries. Accordingly, this oceanic space has seen influx of people from around the world including European traders who plundered natural wealth of this reg…
View article: Reduction in wave shoaling over a linear transition bottom using a porous medium
Reduction in wave shoaling over a linear transition bottom using a porous medium Open
Wave shoaling, which involves an increase in wave amplitude due to changes in water depth, can damage shorelines. To mitigate this damage, we propose using porous structures such as mangrove forests. In this study, we use a mathematical mo…
View article: A rockslide-generated tsunami in a Greenland fjord rang Earth for 9 days
A rockslide-generated tsunami in a Greenland fjord rang Earth for 9 days Open
Climate change is increasingly predisposing polar regions to large landslides. Tsunamigenic landslides have occurred recently in Greenland ( Kalaallit Nunaat ), but none have been reported from the eastern fjords. In September 2023, we det…
View article: Trapezoidal breakwater on reducing resonant wave amplitude on a rectangular basin
Trapezoidal breakwater on reducing resonant wave amplitude on a rectangular basin Open
In this study, we delve into the effectiveness of trapezoidal breakwaters in mitigating resonance phenomena. The challenge at hand is to identify the optimal configuration capable of halting resonance. Employing Shallow Water Equations wit…
View article: Optimal design and placement of a combined trench and submerged breakwater system on the coastal area of Aceh
Optimal design and placement of a combined trench and submerged breakwater system on the coastal area of Aceh Open
Tsunami waves are currently one of the most devastating water hazards that threaten regions or countries near the subduction zones, including Indonesia. In this research, a novel coastal protection system combining a submerged breakwater a…
View article: Numerical investigation for water flow in an irregular channel using Saint-Venant equations
Numerical investigation for water flow in an irregular channel using Saint-Venant equations Open
Given recent flood events in Indonesia, understanding the hydraulic dynamics in open channels, mirroring real-world drainage and river scenarios, has become paramount. To address this, our research employs a numerical model to simulate wat…
View article: Influences of coriolis force and friction on fluid dynamics in specific paraboloid basins
Influences of coriolis force and friction on fluid dynamics in specific paraboloid basins Open
Natural water features, such as rivers, lakes, bays, and straits, exhibit diverse shapes and dynamics. Among these, paraboloid basins, resembling the contours of lakes or closed bays, offer a relatively simple yet intriguing case. This stu…
View article: Wave resonance mitigation using a rigid submerged breakwater in a varying-width channel
Wave resonance mitigation using a rigid submerged breakwater in a varying-width channel Open
This paper digs deeper into the phenomenon of wave oscillation that is caused by external forces, such as air pressure and seismic vibrations. This would eventually lead to potentially dire consequences, particularly in coastal areas. In o…
View article: A non-hydrostatic model for wave evolution on a submerged trapezoidal breakwater
A non-hydrostatic model for wave evolution on a submerged trapezoidal breakwater Open
A depth-averaged non-hydrostatic model is formulated to investigate wave evolution on a water channel with a submerged trapezoidal breakwater. This model is an extension of nonlinear shallow water equations that includes hydrodynamic press…
View article: Numerical study of the solitary wave shoaling phenomena using KdV Equation
Numerical study of the solitary wave shoaling phenomena using KdV Equation Open
In this paper, we use a mathematical model to study the amplification of solitary wave height as water depth decreases. When considering solitary waves, it is necessary to incorporate nonlinear and dispersive effects into the model. As a c…
View article: Modeling the Optimal Combination of Proportional and Stop-Loss Reinsurance with Dependent Claim and Stochastic Insurance Premium
Modeling the Optimal Combination of Proportional and Stop-Loss Reinsurance with Dependent Claim and Stochastic Insurance Premium Open
This paper investigates an optimal reinsurance policy using a risk model with dependent claim and insurance premium by assuming that the insurance premium is random. Their dependence structure is modeled using Sarmanov’s bivariate exponent…
View article: Wave damping by breakwater and mangrove for protecting shoreline
Wave damping by breakwater and mangrove for protecting shoreline Open
In this paper, we investigate wave damping caused by breakwater and mangrove using Shallow Water Equations. To derive the wave transmission coefficient, we solve the model analytically using the separation of variables approach. To solve t…
View article: Generalization of a three-layer model for wave attenuation in n-block submerged porous breakwater
Generalization of a three-layer model for wave attenuation in n-block submerged porous breakwater Open