Monitoring Study of Coastal Morphological Change from Coastal Engineering Structures at Mrigadayavan Palace, Phetchaburi Province Using Geo-Informatics
Abstract
Coastal morphological change is a dynamic occurrence which affected by seasonal climate factors and anthropogenic activities; however, man-made structure or coastal engineering structures tend to enhance the natural balance disturbance. This study intended to explore the change in coastal morphology influenced by the coastal engineering structures in Mrigadayavan Palace, Phetchaburi Province by comparing coastlines from the years of 1994 (period before structure employment) and 2014 to 2021 (period after structure employment). The study examined the changes during the southwest monsoon and northeast monsoon using Landsat-8 satellite imagery and arial photography, suspended sediment analysis and in situ surveys for current, sediment, and beach profile data gatherings. Results showed sediment deposition stage in Southwest monsoon, resulting in longer and more steeper beach front, while sediments were decreased during the Northeast monsoon. Result also revealed that the southernmost breakwater next to a jetty changed the most. Overall, sediment deposition was higher than erosion annually. The average sediment deposition was 15.70 meters while average erosion was 4.90 meters. Area shallower (seawater line to five meters depth) had highest sedimentation rate while area at 10 meters depth had the lowest. The highest suspended sediment volume during the southwest monsoon was 0.3 and the northeast monsoon was 0.27. Tide in the area was mixed tide and moving in north-south axis during high-tide and low-tide, respectively. Tidal range in Southwest monsoon was higher than Northeast monsoon. Results could be concluded that sediment tends to deposit more in this area after the year 2021 but due to long-term disturbance from coastal structure, coastal changing in the area is still inconclusive therefore should be monitored and long-term monitoring of coastal area status to plan a policies or measures for support the impact of various structures including future disasters. Keywords : coastline changes ; sediment deposition ; geo-informaticsReferences
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Sam Roi Yod district, Prachuap Khiri Khan province. Bangkok: Kasetsart University. (in Thai)
Chernprayun S. & Kanasut J. (2017). Study of sediment transport on the bankrud channel By mathematical model.
In 10th THAICID National Symposium. (pp.117-136). Thailand: Royal Irrigation Department. (in Thai)
Chiwaruck C., Hamjun N., Philachai P., Putcharapitchakon K. & Rithphring S. (2013). Grain Size Distribution Along
Cha-Am Beach. KKU Engineering Journal, 40(2), 213-219. (in Thai)
Deasy A. & Aswin S. (2017). Remote Sensing Studies of Suspended Sediment Concentration Variation in Barito
Delta. In The 5th Geoinformation Science Symposium 2017. Indonesia: Universitas Gadjah Mada.
Deetae S., Anongponyoskun M. & Boutson A. (2000), Studies on The Tidal Current Around The Coastal at Laem
Pak Bia, Ban Laem District, Petchaburi Province. In The 38th Kasetsart University Annual Conference.
(pp. 80-85). Thailand: Kasetsart University. (in Thai)
Emily A., Rachel E., Meredith G. & Amy S. (2021). Digital Shoreline Analysis System (DSAS) version 5.1 User
Guide. Massachusetts: U.S. Geological Survey.
Faiboon A. & Sangmanee W. (2019). Geospatial Monitoring and Forecasts of Coastal Engineering Structures
Shoreline Transformational Impact at Songkhla Lake Mouth. Princess of Naradhiwas University Journal,
11(3), 165-179. (in Thai)
Inkerd S., Onsri N., Kwanthong N., Klompong N. & Khankajorn T. (2018). Remote Sensing Applications for Change
Detection in The Andaman Sea Coastal Region, Sikao District, Trang Province. Wichcha Journal, 37(1),
84-98. (in Thai)
Phaksopa J. & Sojisuporn P. (2017). The Analytical of Wave Characteristics and Shoreline Changes at Tumbon
Kao Roop Chang, Songkhla Province in 2015 and 2016. Burapha Science Journal, 22(3), 397-409.
(in Thai)
Phaksopa J., Worachananant S. & Khamphra C. (2017). The Study of Water Current and Sediment around the
Artificial Reefs and Mattapon Ship Wreck, Koh Lan, Chonburi Province. In The 55th Kasetsart University
Annual Conference. (pp. 803-811). Thailand: Kasetsart University. (in Thai)
Rungrodcharoenpol R. & Ritphring S. (2018). Impacts of Jetty on Shoreline Change around Sakom River Mouth. In
The 56th Kasetsart Universit Annual Conference. (pp. 214-221). Thailand: Kasetsart University. (in Thai)
Sarajit O. & Nakhapakorn K. (2010). Geo-information Application for Coastal Erosion Situation, Phetchaburi
Province. Thai Science and Technology Journal, 22(6), 789-800. (in Thai)
Wannuch S. & Supavetch S. (2020). The Effect Of Coastal Change by Pabuk Strom Surge In Sub-Cell E5 RYG.
In The 25th National Convention on Civil Engineering. (pp. 2009-2018). Thailand: Engineering Institute of
Thailand. (in Thai)
Wentworth, C. K. (1922). A scale of grade and class terms for clastic sediments. The University of Chicago Press
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Published
2023-05-11
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Research Article
