摘要
针对陆域保护区低于外江高水位的强潮河口地区,以钱塘江河口区为例建立了覆盖两岸保护区域的高精度二维风暴潮淹没计算数值模型。该模型考虑了陆域保护区道路及滩涂围垦形成的二线堤防等多道具有防潮作用的防线,并以室内波浪模型试验和海塘极限防御能力评估及历史实际台风破坏调查为依据确定临江一线海堤损毁程度。利用该模型在2场超标准风暴潮作用下的仿真成果,对保护区内多道防线联合作用效果进行了分析,确定了典型台风下各道防线的联合作用范围及效果。该结果可为强潮河口地区应对超标准风暴潮的防御措施制定提供重要依据。
This paper is targeted at the inundated conditions which will probably occur in the macro-tidal estuary where the floodplains are lower than the high tidal level.A high-precision two-dimension numerical model is developed to simulate the inundated degree introduced by storm surges by taking the Qiantangjiang estuary area for example.Except for the sea area,both sides of the floodplains are included in the calculation scope.Meanwhile,the secondary dikes owing to the reclamation projects and some roads which have the effect on tide resistance are considered.In this paper,the front dike damage scale is determined by interior wave model experiment,safety assessment of the front dike＇s ultimate defense capability and the investigation of actual dike damage that occurred in Zhejiang sea areas.By using the simulation results under two storm surges over designed standard,this paper analyzes the effects of joint multi-line defense（the secondary dikes and roads） behind the front dikes and obtained action sphere and role of each defense.These results serves as an important basis for the establishment of measures to defend the storm surges over designed standard occurring in the macro-tidal estuary.
出处
《中国农村水利水电》
北大核心
2011年第2期17-22,共6页
China Rural Water and Hydropower
关键词
超标准风暴潮
数值模型
溃堤淹没计算
多道防线
storm surges over designed standard
numerical model
dike-break inundated calculation
joint multi-line of defense
