本文選題：裁彎取直 + 蜿蜒型河流�。� 參考：《浙江大學(xué)》2014年碩士論文

【摘要】：飛云江河口仙篁竹～寶香河段,全長23km,直線距離約8km,河道蜿蜒曲折,其上游的馬嶼、陶山平原區(qū)域洪澇災(zāi)害頻繁。人工裁彎取直是解決此類問題的有效途徑,但鑒于工程規(guī)模宏大,影響深遠,特別是可能引發(fā)的一些負面效應(yīng)須予以高度重視,而且飛云江河口潮強流急,泥沙條件復(fù)雜,因此進行裁彎取直工程影響的科學(xué)研究是十分必要的。 本文以近30個測次的實測地形資料為基礎(chǔ)對飛云江河口及工程水域進行了河床演變分析,詳細分析了蜿蜒河段的河勢特征及河床沖淤變化；鑒于數(shù)值模擬是研究河流動力的重要手段,建立了上至趙山渡,下至飛云江口外琵琶門～南麂～洞頭一線的飛云江河口大范圍二維潮流數(shù)學(xué)模型。針對上、下游兩個彎道的7組不同裁彎布置方案全面研究了工程實施對飛云江河口洪、潮動力和河床沖淤等可能產(chǎn)生的影響。 結(jié)果表明,各裁彎方案均可在不同程度上降低上游的洪水位和滯洪歷時,對防洪產(chǎn)生積極影響但各裁彎方案也導(dǎo)致河口進潮量的減小,從而使得下游河段產(chǎn)生不同幅度的淤積。綜合考慮飛云江洪、潮動力和河床沖淤影響等因素可選擇上彎頂裁方案作為今后進行深化研究的重點方案。
[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.
【學(xué)位授予單位】：浙江大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2014
【分類號】：TV852

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