Assessing the Methods for Analysis of Water Distribution Networks Considering Pressure-Dependent Demand (Ilam Water Distribution- Zone 1)

Document Type : Original Article

Authors

1 Ms.C. Water structure, University of Ilam

2 Assistant Professor, Department of Water Engineering, University of Ilam

Abstract

Traditional water distribution system models, which are referred to as demand-driven analysis are normally analyzed under the assumption that water demands at nodes are known and always satisfied, i.e., they are equal to nodal outflows, regardless of the pressure at nodes. Such analysis is valid under normal design conditions. However, in many critical situations such as pipe burst or breakage and fire-fighting demand on demand nodes, the nodal outflows affected by low pressure will decrease. Therefore, network simulation under deficient pressure conditions using conventional demand-driven analysis can cause large deviation from actual situations.  In this study, the combination of three pressure-dependent demand (PDD) methods with WaterGems hydraulic model has been used to simulate deficient-network performance. Assessingthe performance of three methods proposed was done using two base network and part of the Ilam water distribution network. The results showed that the results of PDD and Abdy Sayyed et al. (2014) methods are close and preferred to very long and Time-consuming relations proposed by researchers, and they yield results just by one-step simulation. These methods respectively provide 82.83 and 82.07 percent of total network demand at the time of breakage in one of the pipes in Ilam water distribution network considering desired pressure equal to 15meters.

Keywords


تابش، م. و ج. سلطانی. 1387. مقایسه فرمول‌های مختلف ارائه شده جهت مصارف کنترل شده در روش تحلیل هیدرولیکی مبتنی بر فشار برای شبکه‌های آبرسانی شهری. سومین کنفرانس مدیریت منابع آب ایران.دانشگاه تبریز.
شیرزاد، ا. و  م. تابش. 1390. بررسی آزمایشگاهی روابط فشار- دبی مورد استفاده در مدل‌های تحلیل هیدرولیکی مبتنی بر فشار شبکه‌های توزیع آب. دهمین کنفرانس هیدرولیک ایران، دانشگاه گیلان.
واسطی، م. م. و ح. ر. لطفی زاده. 1386. تحلیل جامع شبکه­های آبرسانی شهری به روش تقاضای مبتنی بر فشار. سومین کنگره ملی مهندسی عمران. دانشگاه تبریز.
Abdy Sayyed, M. A. H. and R. Gupta. 2013. Predicting Deficient Condition Performance of Water Distribution Networks. J.Civil Engineering Infrastructures, 46(2): 161 – 173.
Abdy Sayyed, M. A. H. , R. Gupta and T. T. Tanyimboh. 2014. Modelling Pressure Deficient Water Distribution Networks in EPANET. Procedia Engineering 89: 626 – 631.
Chandapillai, J., K. P. Sudheer and S. Saseendran. 2012. Design of water distribution network for equitable supply. Water Resour Manage 26:391–406.
Fujiwara, O. and J. Li. 1998. Reliability analysis of water distribution networks in consideration of equity, redistribution, and pressure-dependent demand. J. W. Res. Res. 34(7): 1843–1850.
Germanopoulos, G. 1985.A technical note on the inclusion of pressure dependent demand and leakage terms in water supply network models. Civ Eng Syst 2(3):171–179.
Gupta, R. and P. R. Bhave. 1996. Comparison Methods for Predicting Deficient-Network Performance. J. Water Resour. Plann. Manage. 122 (3), 214–217.
Jowitt, P. W. and C .Xu. 1990. Optimal valve control in water distribution networks. J. Water Resour. Plann. Manage. 116(4), 455–472.
Jun, L. and Y. Guoping. 2013. Iterative Methodology of Pressure-Dependent Demand Based on EPANET for Pressure-Deficient Water Distribution Analysis. J. Water Resour. Plann. Manage.139:34-44.
Liu, J. G .Yu. and D .Savic. 2011.Deficient-network Simulation Considering Pressure-dependent Demand. ICPTT 2011:pp.886-900.
 
 
 
Mallick, K. N., I. Ahmed, K. S. Tickle and K. E.Lansey. (2002). “Determining pipe groupings for water distribution networks.” J. Water Resour. Plann. Manage. 128(2), 130–139.
Muranho, J., A. Ferreira, J. Sousa, A. Gomes and A. SaMarques. 2014.Pressure-Dependent Demand and Leakage Modeling with an EPANET Extension – WaterNetGen. Procedia Engineering 89: 632 – 639.
Ozger, S. S. and L. W. Mays. 2003. “A semi-pressure-driven approach to reliability assessment of water distribution networks.” Proc., 30th IAHR Congress, Aristoteleio Panepistimio Thessalonikis, Thessaloniki, Greece, 345–352.
Reddy, L. S. and K. Elango. 1989. Analysis of water distribution network with head dependent outlets. Civ Eng Syst 6(3):102–110.
Rossman, L. A. 2007. Discussion of ‘Solution for water distribution systems under pressure-deficient conditions’ by Ang WK, Jowitt PW. J Water Resour Plan and Manag 133(6):566–567.
Tanyimboh, T. T. and A. B .Templeman. 2010. Seamless Pressure-Deficient Water Distribution System Model. J. Water Manage. 163:215-224.
Tucciarelli, T., A. Criminisi and D. Termini. 1999. Leak analysis in pipeline systems by means of optimal valve regulation. J. Hyd. Eng. 125(3): 277–285.
Wagner, J. M., U. Shamir and D. H. Marks. 1988. Water distribution reliability: Simulation methods. J. Water Resour. Plann. Manage. 114(3): 276–294.
Yoo, D., M. Suh, J. Kim. H. Jun and G. Chung.2012. Subsystem-Based Pressure Dependent Demand Analysis in Water Distribution Systems Using Effective Supply. KSCE Journal of Civil Engineering (2012) 16(3):457-464. DOI 10.1007/s12205-012-1448-1.