The Experimental Simulation And Studies On Parameter Estimation Methods For Water Distribution Networks

It is necessary to establish the dynamic micro-model in order to solve the problem of optimal planning and scheduling for the water distribution networks. Practically, the urban water distribution network is buried underground, leading to some difficulties in installing measuring equipment in the water supply system. Therefore. it is inappropriate to carry out experiments using the actual pipes. Instead, a pipe network model serving as an equivalent of the actual pipe system should be developed for the experiments. This study first discusses the methods to build the pipe network model. Based on these methods, the author establishes the final experimental model, through which the modeling methods for the hydraulic calculation and the parameter estimation methods for the pipe network are analyzed.The author discusses the common simplified methods of the actual pipe network and establishes an indoor tetra-cyclic experimental model in combination with the characteristics of the actual pipe network. At the same time, based on this model, hydraulic tests are carried out in different operating conditions, thus verifying the reliability of this model.In this research, systematic experiments are conducted using the established model. And according to the hydraulic empirical formula. the author processes the data collected from the experiments through SPSS. Finally, hydraulic calculation methods for the waater supply network model are proposed and the reliability of these methods is verified.At the same time, this research also explores the parameter estimation methods for the pipe network, in which the inverse problem method is adopted to acquire the inner diameter of the pipes and a tentative exploration is done to calculate the value of coefficient C in HAZEN-WILIAMS formula.