The Method Of Non-revenue Water Allocation Based On Micro Hydraulic Model

The water supply pipe network is a complicated network system with multiple objectives.Therefore,it is necessary to establish the micro hydraulic model which carry out scientific management of water supply pipe network system.It is to use computer technology to simulate the actual operation of the pipe network,which is also the development of water supply enterprise.However,in the process of establishing the hydraulic model,it is an unavoidable problem that how to perform the modeling work quickly and efficiently and how to improve the accuracy of the modeling.In view of these questions,this article has carried on many aspects research work.First of all,it is necessary for the modeling workers to negotiate well with the water supply department for the problems of incomplete data base and poor accuracy of the pipe network modeling.Then field measurements are carried out for key parameters including pipe and valve resistance coefficient,water pump characteristic curve and variation law of large user water consumption.At the same time,the efficiency of modeling can be effectively improved by using the method of zone modeling,partition checking and comprehensive mesh formation.Through the study of leakage model of water supply network,the consistent leakage model is applied to the method of node flow allocation.And the non-revenue water is divided into the real leakage part and apparent leakage part.Then by considering the two factors of pressure and flow based on the original length effect,it puts forward the leakage flow distribution method of loss model method.Through the numerical verification of the network,compared to the traditional node according to the flow distribution along the flow distribution method,leakage model method can adapt to different working conditions,especially in the hydraulic calculation of non-revenue water accounted for a larger proportion of the total amount of the two when the pressure is about 0.2m.At the same time,the method is programmed by using C# language.By calling the EPANET software's calculation engine,it can be used in a larger amount of water supply network.In order to verify that the leakage model is superior to the traditional method of node flow distribution,it's necessary to arrange pressure monitoring points in engineering examples,comparing the simulation value with the measured value under certain pressure check standard.Pressure monitoring points in the pipe network can reflect the running state of the regional network is relatively comprehensive,and the optimal arrangement for pressure monitoring points can save the network to a certain extent,the investment,which is a necessary condition for the pipeline pressure check.So the mathematical knowledge of fuzzy clustering is used to analyze the leakage sensitivity of the nodes in the pipe network,and the resulting matrices are grouped and analyzed,then the optimal arrangement of pressure points in the pipe network is finally obtained.Taking the H model of water supply network in Tianjin as a case and the actual application of the above method is made,check the accuracy of the model.And the result shows that the model can meet the requirements of pressure check,also proposed the leakage model method is feasible.