河道边界水位对管道排水能力的影响分析
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摘要
为保证城市排水安全,缓解城市内涝,针对河道排涝水位对管道排水的动态影响问题,选用宿迁市马陵河排水片区为研究区,基于SWMM模型,模拟2、3和5 a重现期暴雨条件下出水口管道分别为自由出流、半淹没出流和完全淹没出流3种情形的管道相对排水能力变化,并在此基础上探求马陵河各分段控制水位。结果表明:管道水流主要受河道高水位作用,即管道完全淹没出流时,排水能力随水位的升高而不断减小,减小程度与末管道高差和水位动态顶托管道水流有关。此结论可为城市排水管网改造及河道调控水位除涝提供科学参考。
In order to ensure the safety of urban drainage and alleviate the urban waterlogging,aiming at the dynamic influence of river drainage level on the drainage of pipelines,the draining area of Maling River in Suqian City is chosen as the study area. Based on storm water management model( SWMM),the changes of relative drainage capacity of free-flow pipe,semi-submerged outflow and completely submerged outflow were simulated in the case of design storm return period being 2,3,5 years. And on this basis the Maling River sub-controlled water level was explored. The results showed that the water flow in the pipeline is mainly affected by the high water level. When the pipeline is fully submerged,the drainage capacity decreases with the rise of the water level. The decreasing degree is related to the height difference of the terminal pipe and the water flow by the dynamic backwater effect. This conclusion can provide a scientific reference for pipe network reconstruction and river regulation for waterlogging.
In order to ensure the safety of urban drainage and alleviate the urban waterlogging,aiming at the dynamic influence of river drainage level on the drainage of pipelines,the draining area of Maling River in Suqian City is chosen as the study area. Based on storm water management model( SWMM),the changes of relative drainage capacity of free-flow pipe,semi-submerged outflow and completely submerged outflow were simulated in the case of design storm return period being 2,3,5 years. And on this basis the Maling River sub-controlled water level was explored. The results showed that the water flow in the pipeline is mainly affected by the high water level. When the pipeline is fully submerged,the drainage capacity decreases with the rise of the water level. The decreasing degree is related to the height difference of the terminal pipe and the water flow by the dynamic backwater effect. This conclusion can provide a scientific reference for pipe network reconstruction and river regulation for waterlogging.
引文
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[4]张惠锋.城镇排水标准与区域除涝标准衔接的研究进展[J].净水技术,2016,35(3):123-125.
[5]陈婕,叶兴成,王飞,等.城市不同排水除涝标准衔接方法的探讨[J].水资源与水工程学报,2017,28(4):40-44.
[6]黄国如,王欣.基于城市雨洪模型的市政排水与水利排涝标准衔接研究[J].水资源保护,2017,33(2):1-5.
[7]严婉玲.市政排水与水利排涝关系探索[J].人民珠江,2017,38(6):43-48.
[8]李卫东,徐向阳.不同破坏率下管道排水与河道排涝标准衔接探讨[J].中国农村水利水电,2015(11):182-184.
[9]陈斌.城市排涝与排水研究[J].给水排水,1996(9):17-20+2-3.
[10]范立柱,刘晓鹏.广州地区水利排涝标准与市政排水重现期的关系分析[J].广东水利水电,2012(12):17-18+25.
[11]王峰,颜正惠,黄伟乐,等.城市雨水内涝成因及对策[J].中国给水排水,2012,28(12):15-17+20.
[12]姜容,邵银霞,李光炽.外河对城市排水管网影响的数值模拟研究[J].水力发电,2017,43(10):94-98.
[13]王慧亮,吴泽宁,胡彩虹.基于GIS与SWMM耦合的城市暴雨洪水淹没分析[J].人民黄河,2017,39(8):31-35+43.
[14]张晓波,盛海峰.城市市政排水与区域排涝水动力耦合模型研究[J].人民长江,2015,46(18):15-19+47.
[15]芮孝芳,蒋成煜,陈清锦,等.SWMM模型模拟雨洪原理剖析及应用建议[J].水利水电科技进展,2015,35(4):1-5.
[16]穆祥鹏.复杂输水系统的水力仿真与控制研究[D].天津:天津大学,2008.
[17]梁小光,王盼,吕永鹏,等.内河水位对管网系统排水能力的影响模拟[J].城市道桥与防洪,2014(11):11-14+19.