长兴岛引清调水与不冲流速关系研究  

The study of clean water diversion in Changxing Island with the non-scouring velocity

作　　者：凌穆峰 谢慧姣 章笑 

机构地区：[1]上海友为工程设计有限公司,上海200333

出　　处：《净水技术》2017年第A01期166-170,共5页Water Purification Technology

摘　　要：平原河网做为城市雨污水的排水通道,由于自身缺乏水动力,水环境恶化速度快。为维持水环境良好,河网需定期引清调水。调水过程流量的大小决定了调水效率和是否会引起河道冲刷,为此,需合理确定引、排水流量。本文以长兴岛河网为例,采用Mike21数学软件建立了长兴岛二维河网模型,对引清调水过程进行水动力计算;同时根据长兴岛河道原状土不冲流速物理模型试验结果,对比流速分布,拟定合适的限制流量。根据计算结果,排水时流量可控制在50~60 m^3/s以内,引水过程流量可控制在50 m^3/s以内,同时,在超过不冲流速的局部河段采取护底或护坡措施。River network in plain areas, as the drainage channels of urban rainwater and sewage, because of lack of water power, the speed of water degradagion is very quickly. The fiver network needs clean water diversion regularly for maintaining good water environment. The discharge determines the diversion efficiency and the channel erosion. As the Changxing Island for example, this article establishes the two-dimensional model using Mike21, calculates the water diversion process. According to undisturbed soil physical model test results, this article campares the non-scouting velocity with the calculating velocity, then formulates the limited disehange. According to the result, the outflow controls within 50-60 m3/s, the inflow controls within 50 m3/s, and the same time, takes the slope protection or bottom protection at the reach that exceeding the non-scouting velocity.

关 键 词：平原河网 引清调水 不冲流速 长兴岛 MIKE21 

分 类 号：TV52[水利工程—水利水电工程]