عنوان مقاله [English]
One of the most sensitive and cost-intensive systems in urban water and wastewater companies is accident systems. Lack of a modern, accurate, and reliable burst management system at the present time results in great damages to consumers and to urban water and wastewater companies. Given the shortage of water and real loses in urban water distribution networks, burst modeling and management forms a necessary research area for water and wastewater companies. Improved efficiency of urban water supply and distribution system is the only possible way which cuts across innovative sciences and technologies. One such technology is the geospatial information system (GIS) that generates useful geospatial information and is used to perform spatial and hydraulic analyses that play an important role in urban water distribution networks. The purpose of this research is to study the fundamental concepts of establishing an accident management and modeling system in the Iranian urban water and wastewater companies using GIS. Systematic data storage, use of burst repair data, decreasing repair period, and determining real water losses, number of bursts, and required costs are of the advantages of this model. In this paper, a methodology is presented to gather and evaluate the burst data using the available spatial GIS analysis functions. Selecting a pilot area in Hamedan, accident information was gathered over a 6-month period. Several spatial and hydraulic analyses were performed and a number of indices were developed. The results showed that this network had a high break rate (13.58) which indicates poor infrastructure and management of the system. Furthermore, the main reason for pipe bursts was found to be poor hydraulic situation. It was concluded that applying this model which has been used in a real urban water distribution network increases the efficiency of the system and decreases the related burst costs.