On-Site Investigations of Coastal Erosion and Accretion for the Northeast of Taiwan
Coastal erosion is a major natural hazard along the northeastern shoreline (i.e., Yilan County) of Taiwan. Analyses of the evolution of the 0 m isobath of the Yilan County coastline indicate that erosion and accretion are occurring north and south of Wushi Fishery Port, respectively, because of jett...
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| Format: | Article |
| Language: | English |
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MDPI AG
2022-02-01
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| Series: | Journal of Marine Science and Engineering |
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| Online Access: | https://www.mdpi.com/2077-1312/10/2/282 |
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| author | Ting-Yu Liang Chih-Hsin Chang Shih-Chun Hsiao Wei-Po Huang Tzu-Yin Chang Wen-Dar Guo Che-Hsin Liu Jui-Yi Ho Wei-Bo Chen |
| author_facet | Ting-Yu Liang Chih-Hsin Chang Shih-Chun Hsiao Wei-Po Huang Tzu-Yin Chang Wen-Dar Guo Che-Hsin Liu Jui-Yi Ho Wei-Bo Chen |
| author_sort | Ting-Yu Liang |
| collection | DOAJ |
| description | Coastal erosion is a major natural hazard along the northeastern shoreline (i.e., Yilan County) of Taiwan. Analyses of the evolution of the 0 m isobath of the Yilan County coastline indicate that erosion and accretion are occurring north and south of Wushi Fishery Port, respectively, because of jetty and groin construction. Topographic and bathymetric surveys involving the measurement of 43 cross sections were conducted in 2006, 2012, 2013, and 2019. The cross-shore profile comparisons reveal that the erosion of onshore dunes is significant in the northern Jhuan River estuary. Due to the establishment of a nature reserve in the southern Lanyang River estuary, the sediments are carried northward by tidal currents, and accretion is inevitable in the northern Lanyang River estuary. The results of the bathymetric surveys also suggest that the shoreline of Yilan County tends to accrete in summer because of abundant sediment from the rivers; however, it is eroded in winter, owing to the large waves induced by the northeast monsoon. Additionally, the calculated net volume of erosion and accretion between each pair of cross sections shows that the length of coastline impacted by estuarine sediment transport is approximately 2 km long from north to south along the coastline of the Lanyang River estuary. |
| first_indexed | 2024-03-09T21:39:35Z |
| format | Article |
| id | doaj.art-c97410c4021e442d82c7f6b5bafd7d48 |
| institution | Directory Open Access Journal |
| issn | 2077-1312 |
| language | English |
| last_indexed | 2024-03-09T21:39:35Z |
| publishDate | 2022-02-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Journal of Marine Science and Engineering |
| spelling | doaj.art-c97410c4021e442d82c7f6b5bafd7d482023-11-23T20:36:26ZengMDPI AGJournal of Marine Science and Engineering2077-13122022-02-0110228210.3390/jmse10020282On-Site Investigations of Coastal Erosion and Accretion for the Northeast of TaiwanTing-Yu Liang0Chih-Hsin Chang1Shih-Chun Hsiao2Wei-Po Huang3Tzu-Yin Chang4Wen-Dar Guo5Che-Hsin Liu6Jui-Yi Ho7Wei-Bo Chen8National Science and Technology Center for Disaster Reduction, New Taipei City 23143, TaiwanNational Science and Technology Center for Disaster Reduction, New Taipei City 23143, TaiwanDepartment of Hydraulic and Ocean Engineering, National Cheng Kung University, Tainan City 70101, TaiwanDepartment of Harbor and River Engineering, National Taiwan Ocean University, Keelung City 202301, TaiwanNational Science and Technology Center for Disaster Reduction, New Taipei City 23143, TaiwanNational Science and Technology Center for Disaster Reduction, New Taipei City 23143, TaiwanNational Science and Technology Center for Disaster Reduction, New Taipei City 23143, TaiwanNational Science and Technology Center for Disaster Reduction, New Taipei City 23143, TaiwanNational Science and Technology Center for Disaster Reduction, New Taipei City 23143, TaiwanCoastal erosion is a major natural hazard along the northeastern shoreline (i.e., Yilan County) of Taiwan. Analyses of the evolution of the 0 m isobath of the Yilan County coastline indicate that erosion and accretion are occurring north and south of Wushi Fishery Port, respectively, because of jetty and groin construction. Topographic and bathymetric surveys involving the measurement of 43 cross sections were conducted in 2006, 2012, 2013, and 2019. The cross-shore profile comparisons reveal that the erosion of onshore dunes is significant in the northern Jhuan River estuary. Due to the establishment of a nature reserve in the southern Lanyang River estuary, the sediments are carried northward by tidal currents, and accretion is inevitable in the northern Lanyang River estuary. The results of the bathymetric surveys also suggest that the shoreline of Yilan County tends to accrete in summer because of abundant sediment from the rivers; however, it is eroded in winter, owing to the large waves induced by the northeast monsoon. Additionally, the calculated net volume of erosion and accretion between each pair of cross sections shows that the length of coastline impacted by estuarine sediment transport is approximately 2 km long from north to south along the coastline of the Lanyang River estuary.https://www.mdpi.com/2077-1312/10/2/282erosion and accretioncross-shore profile evolutionLanyang River estuarylimit of estuarine sediment transportnortheastern coastal waters of Taiwan |
| spellingShingle | Ting-Yu Liang Chih-Hsin Chang Shih-Chun Hsiao Wei-Po Huang Tzu-Yin Chang Wen-Dar Guo Che-Hsin Liu Jui-Yi Ho Wei-Bo Chen On-Site Investigations of Coastal Erosion and Accretion for the Northeast of Taiwan Journal of Marine Science and Engineering erosion and accretion cross-shore profile evolution Lanyang River estuary limit of estuarine sediment transport northeastern coastal waters of Taiwan |
| title | On-Site Investigations of Coastal Erosion and Accretion for the Northeast of Taiwan |
| title_full | On-Site Investigations of Coastal Erosion and Accretion for the Northeast of Taiwan |
| title_fullStr | On-Site Investigations of Coastal Erosion and Accretion for the Northeast of Taiwan |
| title_full_unstemmed | On-Site Investigations of Coastal Erosion and Accretion for the Northeast of Taiwan |
| title_short | On-Site Investigations of Coastal Erosion and Accretion for the Northeast of Taiwan |
| title_sort | on site investigations of coastal erosion and accretion for the northeast of taiwan |
| topic | erosion and accretion cross-shore profile evolution Lanyang River estuary limit of estuarine sediment transport northeastern coastal waters of Taiwan |
| url | https://www.mdpi.com/2077-1312/10/2/282 |
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