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Author: search.filters.author.Unyapoti, Pidok

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    A Shoreline Evolution Model with Wave Crest Model on I-Head and T-Head Groin Structures with Different Types of Breaking Wave
    (2024-06-01)
    Unyapoti, Pidok
    ;
    Pochai, Nopparat
    Beach erosion is a process that results in changes to the materials of a shoreline, with erosion being the removal of material from the shoreline more than its addition. Beach erosion on the shorelines causes loss of landforms and a reduction in size, leading to the need for the development of various structures to mitigate beach erosion. Groin is one of the commonly utilized structures for coastal erosion prevention, and groins of various shapes and forms have been developed to minimize beach erosion to the greatest extent possible. We have focused on assessing the impacts of I-head and T-head groin structures on shoreline evolution, approximated through a shoreline evolution model. Various techniques for setting initial conditions and boundary conditions have been discussed. Additionally, we have explored the structural impacts of these two groin types. We considered the average wave crest impact angle obtained from a wave crest impact model on both the left and right sides of the shoreline, differing over a span of four wavelengths. To estimate shoreline evolution for each year, we employed traditional forward time-centered space techniques and the unconditionally stable Saulyev finite differential techniques. The results of shoreline evolution calculations for both groin structures were found to be consistent across the four cases of the wave crest impact model.
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    A Combination of A Shoreline Evolution Model and A Wave Crest Model on T-Head Groin Structures With the Breaking Wave Effecf
    (2023-01-01)
    Unyapoti, Pidok
    ;
    Pochai, Nopparat
    Beach erosion is a naturally occurring phenomenon that occurs when the transfer of material away from the beach is not balanced by the deposit of new material on the shoreline. Beach erosion have always existed and have influenced the shoreline shape. This is a problem that contributes to the loss of shorelines. Structures invented to prevent beach erosion, such as seawalls, groins, and breakwaters. To avoid coastal erosion and sedimentation, a groin and a sea wall were constructed. Shoreline evolution analysis is being used to research the future topography of the beach. Beach erosion and beach deposition research requires a qualitative analysis of the model shoreline behavior with respect to the driving process. In this research, we focus on the effects of the T-head groin structure on shoreline evolution. The average wave crest impact is analyzed for eight sizes of T-head groin construction. An initial condition setting technique and boundary conditions techniques, as well as the structural impacts of the T-head groin, are discussed. Each year, the shoreline evolution is approximated using the traditional forward time centered space techniques and the unconditionally stable Saulyev finite differential techniques. The calculated impacts of shoreline evolution for eight different T-head groin sizes were consistent with the wave crest impact model.
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    A Shoreline Evolution Model With the Wavelength Effect of Breaking Waves on Groin Structures
    (2022-01-01)
    Unyapoti, Pidok
    ;
    Pochai, Nopparat
    Local sea level rise, strong wave action, and tidal currents all wear down or carry away rocks, soil, and sand along the beaches. The quantity of beach areas has decreased as a result of this issue. Analyzing the progression of the shoreline can help us better understand how the beach will look in the future. A groin structure was built to stop beach erosion and repair the beach. Beach erosion and beach deposition research requires a qualitative analysis of the model shoreline behavior in connection to the governing process. Models for shoreline evolution are the subject of some research. However, they focus on the shoreline evolution in an area between a couple of groin structures. The investigated area of shoreline evolution with a pair of groin structures is enlarged in this research to include the groin system and surrounding area. A more realistic shoreline evolution model has been presented, which takes into account the wavelength influence of breaking waves on groin constructions. The initial condition setting approach and boundary conditions techniques, as well as various groin structural impacts, are discussed. A wave crest impact model and five wavelength effects of breaking waves are introduced. Each year, the coastline evolution is approximated using the classical forward-time centered-space method and the unconditionally stable Saulyev finite differential methods. The estimated impacts of shoreline evolution were consistent with the wave crest impact model for five case wavelengths. For assessing long coastline evolution, the numerical models presented enable a reasonable simulation. The efficiency of building a groin system on a nearby beach might be predicted using the proposed modeling.
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    A shoreline evolution model with a groin structure under non-uniform breaking wave crest impact
    (2021-04-01)
    Unyapoti, Pidok
    ;
    Pochai, Nopparat
    Beach erosion is a natural phenomenon that is not compensated by depositing fresh material on the shoreline while transporting sand away from the shoreline. There are three phenomena that have a serious influence on the coastal structure, such as increases in flooding, accretion, and water levels. In addition, the prediction of coastal evolution is used to investigate the topography of the beach. In this research, we present a one-dimensional mathematical model of shoreline evolution, and the parameters that influence this model are described on a monthly basis over a period of one year. Consideration is given to the wave crest impact model for evaluating the impact of the wave crest at that stage. It focuses on the evolution of the shoreline in environments where groins are installed on both sides. The initial and boundary condition setting techniques are proposed by the groins and their environmental parameters. The non-uniform influence of the crest of the breaking wave is so often considered. We then used the traditional forward time centered space technique and the Saulyev finite difference technique to estimate the monthly evolution of the shoreline for each year.
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    A shoreline evolution model with a twin groins structure using unconditionally stable explicit finite difference techniques
    (2021-01-01)
    Unyapoti, Pidok
    ;
    Pochai, Nopparat
    Beach erosion is a natural process that occurs when conveying sediment away from the shoreline is not balanced by depositing new material on the shoreline. This is a problem that is causing beach areas to decline. To avoid beach erosion and flooding, a sea wall and groin have been built. Shoreline evolution prediction is used to investigate the beach topography in the future. There are three phenomena give a large effect to the coastal structure such as the erosion, the accretion and the water level changes. To investigate of beach erosion and beach deposition is needed qualitative understanding of idealized shoreline response to the governing process. In this research, we introduce a governing equation of a one-dimensional shoreline evolution model when a couple of groins is added. The introduced model is a transient one-line model. The manipulation of physical parameters for the model is introduced. The setting method of the initial condition and the boundary conditions techniques when a couple of groin structure effect are also proposed. The traditional forward time centered space method and the unconditionally stable Saulyev finite difference methods are employed to approximate the incremental model in each year. The proposed numerical models give practically simulation for long-term shoreline evolution investigation. The proposed simulation can be used to predict the efficiency of a groin system construction in a local beach. The model is a tool for environment impact assessment of a installing groin structure project.