Hydrodynamic Mechanism of Morphology Revolution of the Xiaomiaohong Tidal Channel in Radial Sand Ridges,Jiangsu Province
Hydrodynamic Mechanism of Morphology Revolution of the Xiaomiaohong Tidal Channel in Radial Sand Ridges,Jiangsu Province
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发表时间：
2012-03
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通讯作者：
Chen Kefeng;Lu Peidong;Y. Guohua
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作者：
Chen Kefeng;Lu Peidong;Y. Guohua
通过对40 a来的地形资料对比分析表明，小庙洪水道入口具有北淤南冲的演变趋势，北槽不断淤积消失，南槽充分发育，并结合实测资料和潮流分析，探讨了不同水道冲淤变化的水动力机制数学模型。小庙洪水道多年来之所以存在北淤南冲的状况，与该地区的潮流特征密切相关，入口南、中水道落潮流量强于洪水，呈“落潮主导”型，反之，北水道具有“洪水主导型”特征，泥沙输移呈现出北进南出的趋势，与北水道淤积萎缩、南水道侵蚀扩展的趋势相一致。
The comparison of the terrain data from the past 40 years shows that the inlet of the Xiaomiaohong channel has an evolutionary tendency of deposition in the north and erosion in the south.The north trough was silted constantly to disappear while the south trough developed adequately.The hydrodynamic mechanism of the change in deposition and erosion in different channels was discussed based on the analysis of field data and the tidal current Mathematical model.The reason that a state of deposition in the north and erosion in the south exists in the Xiaomiaohong channel during the past years is closely related to the tidal current characteristics in this area.The ebb flow discharge is stronger than flood in the south and middle waterways of the inlet,with an "ebb-dominated" style.On the contrary,the north waterway has a "flood-dominated" style.The sediment transportation shows a trend of northward inflow and southward outflow,consistent with the trend of deposition and atrophy in the north waterway and erosion and extension in the south waterway.