Analysis And Dynamic Modeling Method Of Water Leakage In Water Distribution Systems

Leakage of water distribution systems is a serious problem in water industries. The manager of water supply enterprises always can not know the precise location and classification of leakage. Therefore, leakage of water distribution systems has become an important issue of concern to study in the water industries.Study on how to reduce the workload of network detection, or only carry through partially has been made in this paper, and the dynamic condition of nonmetered water and physical losses of the entire network are obtained, a dynamic model of leakage flow rates has been proposed, and the method to establish the model has also been presented.The main research achievements of this paper include:1. According to collecting and analyzing the leakage data and investigation results, the reasons for network leakage are summarized.2. A deep research on the analyzing principle of leakage, presumes that losses in certain physical states of a network are a function of pressure, while nonmetered water are a function of consumption patterns.3. A methology of discrimination of two components of uncontrolled water (Physical losses and nonmetered water) has been presented. And a dynamic model of leakage in water distribution network has been established. On the basis of leakage frequency of each pipeline, a method to present the spatial distribution of physical losses is given.4. Choosing efficiency, pressure, demand patterns, leakage frequency, leakage distribution and exponent of experimental formula, a sensitivity analysis is performed for evaluating which parameters have the greatest influence on the accuracy of the results. As a result, efficiency has most influence on the dynamic model, secondly, demand patterns, pressure, exponent of experimental formula in order, while leakage frequency and leakage distribution has the smallest effect on the mathematical model.5. With an engineering example of the city of ZJ, a statistical analysis of the leakage detection results has been made, and a leakage flow rates dynamic model of...