Statistical approach to developing screening models for pipe failure events in water network systems

2018 ◽  
Vol 120 ◽  
pp. 190-197
Author(s):  
Bumjo Kim ◽  
Seo Jin Ki ◽  
Dong Jin Jeon ◽  
Joon Ha Kim
Keyword(s):  
Statistical Approach ◽  
Water Network ◽  
Pipe Failure ◽  
Network Systems

scholarly journals Water Main Failure Risk Assesment / OCENA RYZYKA AWARII MAGISTRALI WODOCIĄGOWEJ

2012 ◽  
Vol 24 (1) ◽  
pp. 115-124
Author(s):  
Andrzej Studziński ◽  
Katarzyna Pietrucha-Urbanik
Keyword(s):  
Water Demand ◽  
Water Storage ◽  
Negative Consequences ◽  
Storage Tanks ◽  
Water Network ◽  
Pipe Failure ◽  
Water Mains ◽  
Water Main ◽  
Qualitative Risk Analysis ◽  
Made In

Abstract Town of Krosno is supplied with water by 3 intakes: Sieniawa, Iskrzynia and Szczepańcowa. After the treatment water flows in water mains to the water network in Krosno. The aim of his paper is qualitative risk analysis of the water main Sieniawa failures. The consequences of the failure: pressure value in the network and its duration, were described for different conditions of failures: time of failure, water demand and water storage tanks initial filling. For simulations of pipe failure water network model made in Epanet 2 program was used. The model was verified both during operation of water network and during the failure, where field data were used. The results of the simulations are corresponding to observations made during the real failures. Negative consequences appear only after emptying the water storage tanks, it results from two features of the storage tanks: they stabilize pressure in the network and for some time can provide water to the network. The time of emptying the storage tanks varies according to water demand their initial filling, it is at least 3 hours. During this time the are no sign of failure. When the storage tanks are empty reduction of pressure an shortage of water are observed on prevailing area of Krosno.

scholarly journals Comparison Between Calibration and Sensitivity Approach in Water Network Management in Emergency Conditions

10.29007/fgbp ◽  
2018 ◽  
Author(s):  
Attilio Fiorini Morosini ◽  
Olga Caruso ◽  
Paolo Veltri
Keyword(s):  
Network Management ◽  
Pressure Reduction ◽  
Water Network ◽  
Pipe Failure ◽  
Critical Nodes ◽  
Intervention Area ◽  
Sensitivity Approach ◽  
Calibration Techniques ◽  
Demand Control

When a network works in emergency conditions, due to a pipe failure, an appropriate management of the system is necessary. These events can cause a bad service for the users, because the pressure in some nodes of the network (critical nodes) decreases and the required demand is not guaranteed. In fact, a pipe failure causes the isolation of the intervention area, modifies the circulating flow along pipes and can produce a pressure reduction in some nodes.In network management the aim is to increase the pressure, and consequently the flow rate delivered at critical nodes in order to minimize disruptions during the time between the failure and the repair.In this paper, a methodology based on the nodal demand control is proposed. The nodal demand control proposed is possible by using control valves and by identifying the nodes where the control should be done. The control nodes can be chosen by using sensitivity matrices or an approach based on calibration techniques. A case study shows the results obtained with both methods for the real network of Praia a Mare in the South of Italy.

Direct and indirect heat transfer in water network systems

2002 ◽  
Vol 22 (8) ◽  
pp. 981-988 ◽  
Author(s):  
L.E. Savulescu ◽  
M. Sorin ◽  
R. Smith
Keyword(s):  
Heat Transfer ◽  
Water Network ◽  
Network Systems
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