淮河干流入洪泽湖河段河床演变特性研究

发布时间：2018-05-08 22:37

本文选题：数字高程模型 + 水沙特性　；参考：《合肥工业大学》2014年硕士论文

【摘要】：浮山至老子山河段是淮河干流入洪泽湖河段，受淮河干流和洪泽湖双重影响，演变规律复杂。该段河道呈倒坡降，阻水严重。研究该段河道演变特性，对于选择该段河道的整治方案、改善入湖河段过流条件，具有重要参考意义。为了理清该段河道的演变特点，本文利用1992年、2001年及2010年实测河道断面资料，建立了该段河道数字高程模型。并利用模型计算河道沿程冲淤量，分析了冲淤区域分布、冲淤方式，以及纵向、横向演变特点。结果表明：(1)浮山至洪山头河段主槽冲刷明显，滩地较稳定；(2)洪山头以下冲淤速度缓慢，洪山头至盱眙段1992至2001年为微淤，，2001至2010年转变为微冲；（3）河道没有出现明显的支汊淤积现象。河道冲淤变化，归根结底是由于水流含沙量与挟沙能力不相适应。研究河道的水沙特性，对于理解河道的冲淤现象、把握河道冲淤特性，都是非常重要的。鲁台子水文站是淮河中游重要水文站。本文以鲁台子水沙资料为基础，研究了淮河中游水沙特性，建立了水沙关系式。泥沙数学模型是河床演变研究的重要手段。本文在实际冲淤特性分析和水沙特性分析的基础上，建立了入湖河段一维泥沙数学模型。
[Abstract]:The section from Fushan to Laozi Mountain is a section of Huaihe River flowing into Hongze Lake, which is influenced by both the main stream of Huaihe River and Hongze Lake, and the evolution law is complicated. This section of the river is downhill, blocking the water seriously. The study of the evolution characteristics of this section of the river channel is of great significance for selecting the regulation scheme of this section of the river channel and improving the flow conditions of the river reach into the lake. In order to clarify the evolution characteristics of this section of the river, the digital elevation model of this section is established by using the measured data of river sections in 1992, 2001 and 2010. The model is used to calculate the amount of scour and deposition along the course, and the regional distribution of scouring and silting, the mode of scouring and silting, and the characteristics of longitudinal and lateral evolution are analyzed. The results show that the main channel between Fushan and Hongshantou reaches is obviously washed away, and the beach is more stable than that under Hongshan, and the velocity of scouring and silting is slow. From 1992 to 2001, from Hongshantou to Xuyi, it changed into micro-scour from 2001 to 2010) there is no obvious branch sedimentation in the channel. The change of scour and siltation of river is, in the final analysis, because the sediment content of flow is not suitable for sediment carrying capacity. It is very important to study the characteristics of water and sediment in river course to understand the phenomenon of erosion and siltation and to grasp the characteristics of erosion and siltation. The Lutaizi Hydrologic Station is an important hydrological station in the middle reaches of the Huaihe River. Based on the data of water and sediment in Lutaizi, the characteristics of water and sediment in Huaihe River are studied, and the relationship between water and sediment is established. Sediment mathematical model is an important means to study river bed evolution. Based on the analysis of actual scouring and silting characteristics and the analysis of water and sediment characteristics, a one-dimensional sediment mathematical model for the reach of the lake is established in this paper.
【学位授予单位】：合肥工业大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：TV147

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