飞云江河口蜿蜒型河段裁弯取直工程影响研究

发布时间：2018-05-28 13:03

本文选题：裁弯取直 + 蜿蜒型河流　；参考：《浙江大学》2014年硕士论文

【摘要】：飞云江河口仙篁竹～宝香河段,全长23km,直线距离约8km,河道蜿蜒曲折,其上游的马屿、陶山平原区域洪涝灾害频繁。人工裁弯取直是解决此类问题的有效途径,但鉴于工程规模宏大,影响深远,特别是可能引发的一些负面效应须予以高度重视,而且飞云江河口潮强流急,泥沙条件复杂,因此进行裁弯取直工程影响的科学研究是十分必要的。本文以近30个测次的实测地形资料为基础对飞云江河口及工程水域进行了河床演变分析,详细分析了蜿蜒河段的河势特征及河床冲淤变化；鉴于数值模拟是研究河流动力的重要手段,建立了上至赵山渡,下至飞云江口外琵琶门～南麂～洞头一线的飞云江河口大范围二维潮流数学模型。针对上、下游两个弯道的7组不同裁弯布置方案全面研究了工程实施对飞云江河口洪、潮动力和河床冲淤等可能产生的影响。结果表明,各裁弯方案均可在不同程度上降低上游的洪水位和滞洪历时,对防洪产生积极影响但各裁弯方案也导致河口进潮量的减小,从而使得下游河段产生不同幅度的淤积。综合考虑飞云江洪、潮动力和河床冲淤影响等因素可选择上弯顶裁方案作为今后进行深化研究的重点方案。
[Abstract]:The section of Xianhuang ~ Baoxiang River in the mouth of Feiyun River is 23km in length, with a straight line distance of about 8km. The river course is meandering and winding. Flood disasters are frequent in the upper reaches of Ma Yu and Tao Shan Plain. Artificial cutting and straightening is an effective way to solve such problems. However, in view of the large scale and far-reaching impact of the project, especially the negative effects that may be caused, the tidal current at the mouth of the Feiyun River is intense and the sediment conditions are complex. Therefore, it is necessary to study the influence of cutting and straightening engineering. Based on the measured topographic data of nearly 30 times, this paper analyzes the evolution of riverbed in Feiyun River Estuary and engineering waters, and analyzes in detail the characteristics of river regime and river bed scour and siltation in the meandering reach. In view of the fact that numerical simulation is an important means to study the dynamics of rivers, a large-scale two-dimensional tidal current mathematical model of Feiyun River Estuary is established, from the upper to the Zhaoshandu, and down to the front line of pipa Gate to Nanji to Dongtou outside the Feiyun River Estuary. Aiming at the seven groups of different bending arrangement schemes of two bends upstream and downstream, the possible effects of engineering implementation on flood, tidal force and bed scour and deposition in Feiyun River mouth are studied. The results show that each bending scheme can reduce the flood level and duration of flood detention in the upper reaches to varying degrees, which has a positive effect on flood control. However, each bending scheme also leads to the decrease of tidal inflow of the estuary, which results in the deposition of different ranges in the lower reaches of the river. Considering the influence of Feiyun river flood, tidal force and river bed scour and deposition, we can choose the top cutting scheme as the key scheme for further research in the future.
【学位授予单位】：浙江大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：TV852

【参考文献】