【摘要】 为了探究河口形态变化对天文潮和风暴潮的影响,应用二维水动力模型对椒江河口的风暴潮进行模拟。模型重现了9711号台风引起的风暴潮,并利用实测和预报资料对风场、天文潮位、风暴潮位进行了验证。基于围垦规划的思路,从北岸延伸、南岸延伸、两岸同时延伸和河口收窄四种河口形态变化的角度出发,设置了四组试验方案,分别建立天文潮和风暴潮模型。结果表明,河口形态不同方式的改变对天文高潮位、风暴高潮位和风暴增水有着不同形式和程度的影响,对比分析前后方案的流场可以初步探究其变化的原因。本文成果有助于认识河口形态对河口动力的影响,为海洋防灾减灾提供参考。更多还原

【Abstract】 A two-dimensional hydrodynamic model is applied to investigation of the effects of variations in Jiaojiang estuarine geography on storm tides. The model was used to reproduce the storm surge generated by Typhoon 9711 and validated against previous measurements of wind fields,tide levels, and storm tide levels. Based on the idea of reclamation planning, astronomical and storm tides were examined under four series of different geographical modifications: north bank extension,south bank extension, two bank extension, and estuarine narrowing. Results show that the different estuarine geography have different effects on water levels in the pattern and degree. And it can be explained by comparison and analysis of the flow fields in the estuary. The results help understand the effects of variations in estuarine geography on the dynamics in tidal estuaries to reduce and prevent hazards.更多还原