Grain-Size Distribution of Surface Sediments in the Chanthaburi Coast, Thailand and Implications for the Sedimentary Dynamic Environment
This paper analyzes the grain-size distribution of surface sediments of the Chanthaburi coast of Thailand to investigate the sedimentary environment and its evolution to better use and protect the coast. The Flemming triangle method, the grade-standard deviation method, and the Gao–Collins grain-siz...
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| Format: | Article |
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MDPI AG
2020-04-01
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| Series: | Journal of Marine Science and Engineering |
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| Online Access: | https://www.mdpi.com/2077-1312/8/4/242 |
| _version_ | 1797571713332936704 |
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| author | Chengtao Wang Min Chen Hongshuai Qi Wichien Intasen Apichai Kanchanapant |
| author_facet | Chengtao Wang Min Chen Hongshuai Qi Wichien Intasen Apichai Kanchanapant |
| author_sort | Chengtao Wang |
| collection | DOAJ |
| description | This paper analyzes the grain-size distribution of surface sediments of the Chanthaburi coast of Thailand to investigate the sedimentary environment and its evolution to better use and protect the coast. The Flemming triangle method, the grade-standard deviation method, and the Gao–Collins grain-size trend analysis method (GSTA model) were used to study the dynamic sedimentary environment of the area and provide preliminary identification of source materials. There are seven types of surface sediments on this coast, with grain sizes (<i>φ</i>) generally consisting of sand and silt. Sorting is generally poor, and becomes gradually poorer with distance offshore. Skewness is generally positive. The study area is mainly composed of sand and silt, indicating that the hydrodynamics are strong. The results of grade-standard deviation analysis indicate that sediment grain size b (3.25–4.5<i>φ</i>) is a sensitive indicator of environmental change. This sediment type exhibits a relatively complex transport trend, mainly characterized by northwestward and northeastward transport from sea to land. Sediments at the mouth of the Chanthaburi Estuary and the Welu River fluctuate under the influence of tidal currents. Based on the results of grade-standard deviation analysis and grain-size trend analysis, the study area was divided into three provinces, representing different sedimentary environments and material sources. Compared with tidal-controlled estuaries in the temperate regions of eastern China, the two tropical estuaries examined in this study exhibited smaller suspended sediment loads, runoff amounts, and tidal ranges. However, hydrodynamic conditions were generally stronger. The main reasons for the similarities and differences in the transport trends of sediments in these estuaries were differences in hydrodynamic conditions and the specifics of regional topography. |
| first_indexed | 2024-03-10T20:44:25Z |
| format | Article |
| id | doaj.art-f222860d6bc3401ea0e5abe3790c5009 |
| institution | Directory Open Access Journal |
| issn | 2077-1312 |
| language | English |
| last_indexed | 2024-03-10T20:44:25Z |
| publishDate | 2020-04-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Journal of Marine Science and Engineering |
| spelling | doaj.art-f222860d6bc3401ea0e5abe3790c50092023-11-19T20:26:57ZengMDPI AGJournal of Marine Science and Engineering2077-13122020-04-018424210.3390/jmse8040242Grain-Size Distribution of Surface Sediments in the Chanthaburi Coast, Thailand and Implications for the Sedimentary Dynamic EnvironmentChengtao Wang0Min Chen1Hongshuai Qi2Wichien Intasen3Apichai Kanchanapant4Institute of Oceanography, Ministry of Natural Resources, Xiamen 361005, ChinaInstitute of Oceanography, Ministry of Natural Resources, Xiamen 361005, ChinaInstitute of Oceanography, Ministry of Natural Resources, Xiamen 361005, ChinaDepartment of Mineral Resources, Ministry of Natural Resources and Environment, Ratchathewi Bangkok 10400, ThailandDepartment of Mineral Resources, Ministry of Natural Resources and Environment, Ratchathewi Bangkok 10400, ThailandThis paper analyzes the grain-size distribution of surface sediments of the Chanthaburi coast of Thailand to investigate the sedimentary environment and its evolution to better use and protect the coast. The Flemming triangle method, the grade-standard deviation method, and the Gao–Collins grain-size trend analysis method (GSTA model) were used to study the dynamic sedimentary environment of the area and provide preliminary identification of source materials. There are seven types of surface sediments on this coast, with grain sizes (<i>φ</i>) generally consisting of sand and silt. Sorting is generally poor, and becomes gradually poorer with distance offshore. Skewness is generally positive. The study area is mainly composed of sand and silt, indicating that the hydrodynamics are strong. The results of grade-standard deviation analysis indicate that sediment grain size b (3.25–4.5<i>φ</i>) is a sensitive indicator of environmental change. This sediment type exhibits a relatively complex transport trend, mainly characterized by northwestward and northeastward transport from sea to land. Sediments at the mouth of the Chanthaburi Estuary and the Welu River fluctuate under the influence of tidal currents. Based on the results of grade-standard deviation analysis and grain-size trend analysis, the study area was divided into three provinces, representing different sedimentary environments and material sources. Compared with tidal-controlled estuaries in the temperate regions of eastern China, the two tropical estuaries examined in this study exhibited smaller suspended sediment loads, runoff amounts, and tidal ranges. However, hydrodynamic conditions were generally stronger. The main reasons for the similarities and differences in the transport trends of sediments in these estuaries were differences in hydrodynamic conditions and the specifics of regional topography.https://www.mdpi.com/2077-1312/8/4/242surface sedimentsgrain-size transport trendgrade-standard deviation methodsedimentary dynamic environmentGulf of ThailandChanthaburi coast |
| spellingShingle | Chengtao Wang Min Chen Hongshuai Qi Wichien Intasen Apichai Kanchanapant Grain-Size Distribution of Surface Sediments in the Chanthaburi Coast, Thailand and Implications for the Sedimentary Dynamic Environment Journal of Marine Science and Engineering surface sediments grain-size transport trend grade-standard deviation method sedimentary dynamic environment Gulf of Thailand Chanthaburi coast |
| title | Grain-Size Distribution of Surface Sediments in the Chanthaburi Coast, Thailand and Implications for the Sedimentary Dynamic Environment |
| title_full | Grain-Size Distribution of Surface Sediments in the Chanthaburi Coast, Thailand and Implications for the Sedimentary Dynamic Environment |
| title_fullStr | Grain-Size Distribution of Surface Sediments in the Chanthaburi Coast, Thailand and Implications for the Sedimentary Dynamic Environment |
| title_full_unstemmed | Grain-Size Distribution of Surface Sediments in the Chanthaburi Coast, Thailand and Implications for the Sedimentary Dynamic Environment |
| title_short | Grain-Size Distribution of Surface Sediments in the Chanthaburi Coast, Thailand and Implications for the Sedimentary Dynamic Environment |
| title_sort | grain size distribution of surface sediments in the chanthaburi coast thailand and implications for the sedimentary dynamic environment |
| topic | surface sediments grain-size transport trend grade-standard deviation method sedimentary dynamic environment Gulf of Thailand Chanthaburi coast |
| url | https://www.mdpi.com/2077-1312/8/4/242 |
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