TAILIEUCHUNG - Morphological response to port construction on sendai coast

Morphological response to port construction on sendai coast. The difference in topographic evolution observed in both cases caused by the layout of coastal structures interacted with wave action which should have more clear understanding before the construction of any sea defences. This study also attempted to analyse the shoreline behaviour around Nanakita River mouth by utilising the aerial photograph. The GIS tool also is used in processing aerial photograph which have taken regularly in that area. | MORPHOLOGICAL RESPONSE TO PORT CONSTRUCTION ON SENDAI COAST Hitoshi TANAKA Professor Department of Civil Engineering Tohoku University 6-6-06 Aoba Sendai 980-8579 Japan. E-mail tanaka@tsunami2 .civil . Sompratana RITPHRING Lecturer Department of Water Resources Engineering Kasetsart University Bangkok 10900 Thailand. E-mail fengstr@ Eko PRADJOKO Graduate Student Department of Civil Engineering Tohoku University 6-6-06 Aoba Sendai 980-8579 Japan. E-mail ekopradjoko@ Abstract This study carried out the analysis of historical topographic data composed of two study areas interacted with coastal structures Sendai Port and Yuriage Port located in the Miyagi Prefecture northeast of Japan. In case of Sendai Port there is the breakwater constructed in 1968 extending for approximately 2 km. The dominant waves caused northward longshore sediment transport as the matter of fact this area should be advanced owing to the sand trapping at breakwater. On the other hand the severe erosion has progressed due largely to the oblique wave confront with breakwater result in wave reflection then interact in beach change. The second case study Yuriage Port was constructed in the 1990s which included 2 jetties and breakwater. It was found that the predominant sediment transport move northwards that resulted in the advancement of shoreline in the southern area of port due to sand deposition in front of breakwater. This study aims to make a comparative study of topographic variability between Sendai Port and Yuriage Port where the predominant wave caused longshore sediment transport move to the same direction. The difference in topographic evolution observed in both cases caused by the layout of coastal structures interacted with wave action which should have more clear understanding before the construction of any sea defences. This study also attempted to analyse the shoreline behaviour around Nanakita River mouth by utilising the aerial .

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