基于内涝风险分析的海绵城市雨水管网优化研究

发布时间：2018-05-06 23:11

本文选题：海绵城市 + 内涝风险　；参考：《合肥工业大学》2017年硕士论文

【摘要】：城市化的进程对城市及周边环境造成了巨大的改变,路面硬化程度的提高、可截留雨水植被的减少、城市原有河道的改造等严重影响了城市的自然气候,改变了其水文效应。在突发特大暴雨及持续性降雨的情况下,由于城市排水系统存在管网排水能力不足、市政调蓄能力差、河道拥堵等诸多问题,造成多个城市地面积水难以排除,最终导致严重的内涝现象。城市内涝不仅给居民生活造成了诸多的不便,更严重威胁着生命安全,同时也造成了经济上的重大损失。结合水力模型建立内涝风险分析的方法,以及基于风险分析对雨水管网优化和海绵城市建设展开研究具有很强的现实意义。论文综述比较了现有城市内涝风险评估、雨水管网优化的基本方法,介绍了城市雨水排水系统和治涝系统的基本理念,详细阐述了可变模糊聚类模型的基本原理、计算方法,以合肥市某排水管网系统作为研究对象,构建了排水管网系统内涝风险分析模型,并利用风险分析模型综合评估水力模型的模拟结果;在内涝风险分析研究的基础上,深入探讨了管网的水力性能、经济效果优化的方法;除此之外,文章从径流系数角度出发分析海绵城市建设控制指标的合理性,结合管网内涝风险分析结果研究指标分解的方法,探讨了海绵城市建设对雨水管网优化设计的影响,设计中规划性指标的选取、控制性指标的分解以及建设方案在空间范围、管网合理性等存在区别的建设区域上的适用性,并针对新老城区的建设方案提出了合适的建议及实施的办法,为老城区内涝防治这一课题带来新的思路。
[Abstract]:The process of urbanization has caused great changes to the city and its surrounding environment, the improvement of pavement hardening degree, the decrease of vegetation that can be intercepted by Rain Water, and the transformation of the city's original river have seriously affected the natural climate of the city and changed its hydrological effect. In the case of sudden heavy rain and persistent rainfall, due to insufficient drainage capacity of urban drainage network, poor municipal regulation and storage capacity, congestion of river channels and so on, it is difficult to eliminate water accumulation on the ground in many cities. Eventually leading to serious waterlogging. Urban waterlogging not only causes a lot of inconvenience to residents, but also seriously threatens the safety of life. It is of great practical significance to establish the method of waterlogging risk analysis based on hydraulic model and to study the optimization of rainwater pipe network and the construction of sponge city based on risk analysis. This paper summarizes and compares the basic methods of urban waterlogging risk assessment and rainwater network optimization, introduces the basic concepts of urban Rain Water drainage system and waterlogging control system, and expounds in detail the basic principles and calculation methods of variable fuzzy clustering model. Taking a drainage network system in Hefei as an object of study, a model of waterlogging risk analysis of drainage network system is constructed, and the simulation results of hydraulic model are evaluated synthetically by using the risk analysis model. In addition, the paper analyzes the rationality of the control index of sponge city construction from the point of view of runoff coefficient. Combined with the method of index decomposition of waterlogging risk analysis result of pipe network, this paper discusses the influence of sponge city construction on the optimal design of rainwater pipe network, the selection of planning index, the decomposition of control index and the spatial scope of construction scheme. The rationality of the pipe network is different from the applicability of the construction area, and the appropriate suggestions and implementation methods are put forward for the construction scheme of the new and old urban areas, which will bring new ideas to the subject of waterlogging prevention in the old urban areas.
【学位授予单位】：合肥工业大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TU992

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