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| 1 | Behavior-oriented calculation of the annual coastal bathymetry evolution caused by a reclamation work显示文摘A behavior-oriented formula is improved to calculate the annual coastal bathymetry evolution caused by a reclamation work. This formula is based on a simple hypothesis that, on the time scale of years, the bathymetry evolution is closely related to the change of tidal current field due to the reclamation work. A new coefficient,named the erosion reduction coefficient, is introduced to extend the original formula for applications in calculating bed erosion. A simplified relationship between the annual variation of the siltation/erosion rate and the water depth is introduced to more realistically represent the long-term process of the bathymetry evolution.The improved formula is applied to calculate the bathymetry evolution in 3 a following a reclamation project in the Xiaomiaohong Tidal Channel in Jiangsu coast in China. The results compare well with measurements and those obtained from a process-based numerical model, demonstrating the capability of the improved behaviororiented formula in reproducing the impact of the reclamation project on the local bathymetry evolution. | ZHENG Jinhai HOANG Quoc Xuyen ZHANG Chi CHEN Kefeng DONG Xiaowei LEI Gang WANG Yigang | 2017 | Acta Oceanologica Sinica2017，36，11： | 1 |
| 2 | Predicting Siltation in Entrance Channel Based on Wind Conditions显示文摘The siltation induced by wind waves in an entrance channel is one of the prime factors influencing the operation efficiency of a port.It is necessary to predict the siltation accurately for dredging and ship operation passing through the entrance of the port.However,it is difficult to apply the traditional method to predicting entrance siltation because of its complex computational procedure and lacking the data of ocean dynamic elements in the specified sea area.From the view of energy conservation,a direct relationship between wind conditions and sediment deposition can be founded.On the basis of the above methodology,an empirical formula expressed by wind conditions for forecasting the siltation in the entrance channel is set up.The wind conditions are easily obtained from the local meteorological stations or weather maps,so the formula established in this paper is more convenient and practical than the traditional method.A case study is provided,in which the emopirical formula is calibrated and verified utilizing the measured wind and siltation conditions in the entrance channel of the port.Comparisons between computed values and measured data show satisfactory agreement. | 蒋学炼 曹祖德 李炎保 | 2007 | Transactions of Tianjin University2007，13，5： | 0 |
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