摘要:排水系统是一个城市不可缺少的重要基础设施，也是城市水污染防治和排涝、防洪的骨干工程。它的正常运行直接影响到一个城市社会经济的发展、生态环境的保护和人们的正常生活。在城市排水系统中，为了避免出现因水位过高而外溢的现象，必须对城市排水系统各级泵站的运行进行合理调度。根据相似性原理，用直流电路模型对城市排水系统水位控制进行仿真，以构建辅助等效排水系统。其中，结点水位对应于等效直流电路中的节点电位，管道的阻值系数对应于等效直流电路中边上的电组，而水泵的扬程则对应于等效直流电路中相应边上的电动势。运用基尔霍夫定律构建水流平衡方程式。通过水位控制的迭代算法，可以模拟得出在两个结点间是否需要安装水泵，或需要安装多大扬程的水泵，以达到设计的成本低、周期性短的目的。

关键词：城市排水系统；计算机仿真；直流电路模型

Abstract:The drainage system is indispensable infrastructure of a city, key projects of urban water pollution control and drainage, flood control. The normal operation of a direct impact on an urban social and economic development, protection of ecological environment and people's normal life. In the urban drainage system, in order to avoid the spillover phenomenon due to the water level is too high, you must run the pumping stations at all levels of the urban drainage system reasonable dispatch. According to the similarity principle, the DC circuit model of the urban drainage system, water level control simulation, to build the auxiliary equivalent drainage system. Which nodes the water level corresponding to the equivalent DC circuit node potential pipeline resistance coefficient corresponds to the equivalent DC circuit in the edge of the electric group, the pump head corresponds to the corresponding edge of the equivalent DC circuit electromotive force. Using Kirchhoff's law to build the water balance equation. Level control of the iterative algorithm can simulate drawn between two nodes need to install the pump, or the need to install much lift pump, in order to achieve the design of low-cost, short cyclical purposes.

Key words：Urban drainage systems; computer simulation; DC circuit model