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Leak Detection in Water Collection and Transmission Networks Using the Minimum Nodal Pressure Measurement | ||
| Journal of Rehabilitation in Civil Engineering | ||
| مقاله 9، دوره 6، شماره 1 - شماره پیاپی 11، اردیبهشت 2018، صفحه 104-115 اصل مقاله (1.26 M) | ||
| نوع مقاله: Regular Paper | ||
| شناسه دیجیتال (DOI): 10.22075/jrce.2017.12353.1212 | ||
| نویسندگان | ||
| Hamid Reza Asgari1؛ Mahmoud F Maghrebi* 2 | ||
| 1Department of Civil Engineering, Science and Research Branch, Islamic Azad University, Tehran, Iran | ||
| 2Civil Engineering Department, Faculty of Engineering, Ferdowsi University of Mashhad, P. O. Box 91755-1111, Mashhad, Iran. | ||
| تاریخ دریافت: 07 شهریور 1396، تاریخ بازنگری: 27 شهریور 1396، تاریخ پذیرش: 09 آبان 1396 | ||
| چکیده | ||
| Leak has always been one of the problems in water distribution networks, whose preventing not only results in the saving of water sources but also has profound effects on the maintenance cost of networks. In the present paper, a new method is applied for leak detection in water collection and transmission network. In this method, detection of leak location is performed by pressure difference analysis at junctions and by the help of the relative index of the leak. The pressure measurements should be performed at least at two nodes for two cases of with and without the presence of leak. The minimum number of pressure measurements to form a relative leak index is two. However, in this case, two nodal pressure measurements are too few, and the number of pressure measurement should be increased. Therefore the next option for the number of measurements is three. The investigated network in this research includes 7 wells with an approximate length of 7800 m located in the northwestern city of Mashhad. A real leak with a rate of 7.57 l/s is created at one of the network nodes whose amount is measurable by a volume counter. The real leak is a hypothetical leak which is known in advance, and its magnitude is not necessarily a round number in term of a liter per second. Finally, this leak is identified by the proposed method via 3 nodal pressure measurements. | ||
| کلیدواژهها | ||
| Leak Detection؛ Nodal Pressure؛ Water Conveyance System؛ Head Loss؛ Leak Index | ||
| مراجع | ||
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[1] Todini, E., 2003. A more realistic approach to the extended period simulation of water distribution networks. Advances in water supply management, 173-184. [2] Todini, E., and Pilati, S., 1998. A gradient algorithm for the analysis of pipe network. Computer Applications in Water Supply, 1, 1-20. [3] Covas, D., and Ramos, H., 2010. Case studies leak detection and location in water pipe systems by inverse transient analysis. Journal of Water Resources Planning and Management, ASCE, 136(2), 248-257. [4] Cheng, W. and He, D., 2011. Calibration of nodal demand in water distribution system. Journal of Water Resources Planning and Management, Vol. 137, (1), 31-40. [5] Wu, Z. Y. and Sage, P. 2006. “Water loss detection via genetic algorithm optimization based model calibration”. ASCE 8th Annual Int. Symp. On Water Distribution Systems Analysis, ASCE, Reston, Va. [6] Giustolisi, O., Savic, D., Kapelan, Z., 2008. Pressure-Driven demand and leakage simulation for water distribution networks. Journal of Hydraulic Engineering, ASCE, 118(7), 626-635. [7] Berardi, L., Laucelli, D., Ugarelli, R. and Giustolisi, O., 2015, Leakage Management: planning remote real controlled pressure reduction in oppegard municipality. Procedia Engineering, 119(2015), 72-81 [8] Asgari, H., Maghrebi, M., 2016. Application of Nodal Pressure Measurements in Leak Detection. Flow measurement and instrumentation, Elsevier, 50, 128-134. | ||
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