| Numerical investigation of the effect of seasonal variations of depthof- closure on shoreline evolution |
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| 作者姓名： | Xuan Tinh Nguyen Minh Thanh Tran Hitoshi Tanaka Trung Viet Nguyen Yuta Mitobe Cong Dien Duong |
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| 作者单位： | Department of Civil Engineering;Phu Yen Department of Planning and Investment;Thuyloi University;Department of Civil and Environmental Engineering;Institute of Mechanics |
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| 基金项目： | The authors would like to acknowledge and express gratitude to the national research project“Study on hydrodynamics and sediment transport regime in estuarine and coastal zones of Nha Trang Bay,Khanh Hoa province”of the Ministry of Science and Technology(MOST)of Vietnam(BKHCN/NDT-HD/2013/110)for providing not only the images from the video-camera monitoring system but also partial financial support for this study. |
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| 摘 要： | The current study presents the effects of seasonal variations in the depth-of-closure(Dc)on shoreline evolution using a numerical,one-line shoreline model.Beach erosion of the southern beach of the Nha Trang Coast,which is located in south central of Vietnam,is selected as the study area.This study area is immensely influenced by the tropical monsoon climate that has a clear pattern of large waves in the northeast monsoon season and calm waves in the non-monsoon season.The analysis of the long-term measured shoreline variations from a video-camera system has found a strong correlation of these variations to the monsoon-dominated wave characteristics in the Nha Trang Bay.Therefore,a new approach for determining the depth-of-closure with consideration of the seasonal wave climate changes is purposed in the current study.By implementing this new approach into a numerical,one-line shoreline model,it is found that the seasonal variations of Dc appear to better describe the periodical shoreline evolution due to the monsoon-dominated wave characteristics for the Nha Trang Coast.Such important findings are considered to commonly apply for monsoon-dominated coastal regions in general.These findings are useful information not only for scientific readers but also for the coastal authorities and managers in order to make better countermeasure plans against this kind of erosion mechanism in the future.
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| 关 键 词： | Video camera Shoreline change One-line theory Nha Trang Beach Depth-of-closure Monsoon wave climate |
| 收稿时间： | 20 June 2019 |
Numerical investigation of the effect of seasonal variations of depthof-closure on shoreline evolution |
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| Xuan Tinh Nguyen,Minh Thanh Tran,Hitoshi Tanaka,Trung Viet Nguyen,Yuta Mitobe,Cong Dien Duong.Numerical investigation of the effect of seasonal variations of depthof- closure on shoreline evolution[J].International Journal of Sediment Research,2021,36(1):1-16. |
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| Authors: | Xuan Tinh Nguyen Minh Thanh Tran Hitoshi Tanaka Trung Viet Nguyen Yuta Mitobe Cong Dien Duong |
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| Institution: | 1. Department of Civil Engineering, Tohoku University, 6-6-06 Aoba, Sendai, Japan;2. Phu Yen Department of Planning and Investment, 02 Dien Bien Phu Street, Tuy Hoa City, Phu Yen Province, Viet Nam;3. Thuyloi University, 175 Tay Son Street, Dong Da Ward, Hanoi, Viet Nam;4. Department of Civil and Environmental Engineering, Tohoku Gakuin University, 1-13-1 Chuo, Tagajo, Japan;5. Institute of Mechanics, 264 Doi Can Street, Ba Dinh Ward, Hanoi, Viet Nam |
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| Abstract: | The current study presents the effects of seasonal variations in the depth-of-closure(D_C) on shoreline evolution using a numerical,one-line shoreline model.Beach erosion of the southern beach of the Nha Trang Coast,which is located in south central of Vietnam,is selected as the study area.This study area is immensely influenced by the tropical monsoon climate that has a clear pattern of large waves in the northeast monsoon season and calm waves in the non-monsoon season.The analysis of the long-term measured shoreline variations from a video-camera system has found a strong correlation of these variations to the monsoon-dominated wave characteristics in the Nha Trang Bay.Therefore,a new approach for determining the depth-of-closure with consideration of the seasonal wave climate changes is purposed in the current study.By implementing this new approach into a numerical,one-line shoreline model,it is found that the seasonal variations of D_C appear to better describe the periodical shoreline evolution due to the monsoon-dominated wave characteristics for the Nha Trang Coast.Such important findings are considered to commonly apply for monsoon-dominated coastal regions in general.These findings are useful information not only for scientific readers but also for the coastal authorities and managers in order to make better countermeasure plans against this kind of erosion mechanism in the future. |
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| Keywords: | Video camera Shoreline change One-line theory Nha Trang Beach Depth-of-closure Monsoon wave climate |
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