scholarly journals Integrated Detection of a Complex Underground Water Supply Pipeline System in an Old Urban Community in China

2020 ◽  
Vol 12 (4) ◽  
pp. 1670
Author(s):  
Shifan Deng ◽  
Siyu Ma ◽  
Xiaowen Zhang ◽  
Shiqiang Zhang
Keyword(s):  
Water Supply ◽  
Detection Method ◽  
Urban Community ◽  
Underground Water ◽  
Shaanxi Province ◽  
Water Supply Systems ◽  
Pipeline System ◽  
Detection Scheme ◽  
Integrated Detection ◽  
Water Supply Pipeline

An underground water supply pipeline system is an integral part of urban infrastructure. The safety, stability, reliability, and efficiency of this water system are critical for the daily work and livelihood of the people dependent on it. However, with the development of cities in China, the water supply systems in urban communities require constant re-building and improvement, which complicates the system. Considering the defects of obsolete design, lack of information, and irregularity of the constructions over the years, the maintenance of underground pipelines in older communities is onerous and arduous. In this work, the older pipeline system at the Taibai campus of Northwest University, Shaanxi Province, was taken as one typical old urban community and investigated by different measures. Detection was performed from the available concentrated water supply wells to surrounding areas combining electromagnetic induction, geophysical method by ground-penetrating radar (GPR), and acoustic detection methods. Applying the integrated detection method and considering known pipeline network designs, the properties and complex relationships of different pipeline materials (cast iron, polyethylene (PE), and polyvinyl chloride (PVC)) were determined. In addition, a spatial distribution map of the pipes from wells and the main input water supply pipelines was achieved. The results suggest that the integrated detection scheme combining these three methods provides an effective approach to analyze complex water supply pipelines in older communities, in which each single detection method has more uncertainties. The study provides valuable references for similar communities in many developing countries.

Seismic Damage Assessment of Urban Water Supply Pipeline

2013 ◽  
Vol 316-317 ◽  
pp. 723-726
Author(s):  
Jian Qun Jiang ◽  
Xiao Wen Yao ◽  
Yi Ting Lu
Keyword(s):  
Water Supply ◽  
Damage Assessment ◽  
Longitudinal Direction ◽  
Underground Water ◽  
Seismic Damage ◽  
Pipeline System ◽  
Seismic Damage Assessment ◽  
Water Pipeline ◽  
Ground Condition ◽  
Water Supply Pipeline

Water supply pipeline system is a key issue in urban lifeline engineering, and the seismic assessment for the system damage is of significant importance. In this study, method of seismic damage assessment on underground water supply pipeline is introduced. With emphasis on the uncertainties of earthquake level, ground condition, soil-pipe interaction and capacity to resist pipe deformation in longitudinal direction, the check point method is applied to the reliability study of water pipeline, and a case study is presented to show the implementation of the proposed model.

scholarly journals Transient frequency response based leak detection in water supply pipeline systems with branched and looped junctions

2016 ◽  
Vol 19 (1) ◽  
pp. 17-30 ◽  
Author(s):  
Huan-Feng Duan
Keyword(s):  
Water Supply ◽  
Frequency Response ◽  
Numerical Experiments ◽  
Detection Method ◽  
Leak Detection ◽  
Transient Responses ◽  
Practical Applications ◽  
Supply Pipe ◽  
Pipeline Systems ◽  
Water Supply Pipeline

The transient frequency response (TFR) method has been widely developed and applied in the literature to identify and detect potential defects such as leakage and blockage in water supply pipe systems. This type of method was found to be efficient, economic and non-intrusive for pipeline condition assessment and diagnosis, but its applications so far are mainly limited to single and simple pipeline systems. This paper aims to extend the TFR-based leak detection method to relatively more complex pipeline connection situations. The branched and looped pipe junctions are firstly investigated for their influences to the system TFR, so that their effects can be characterized and separated from the effect of other components and potential leakage defects in the system. The leak-induced patterns of transient responses are derived analytically using the transfer matrix method for systems with different pipe junctions, which thereafter are used for the analysis of pipe leakage conditions in the system. The developed method is validated through different numerical experiments in this study. Based on the analytical analysis and numerical results, the applicability and accuracy as well as the limitations of the developed TFR-based leak detection method are discussed for practical applications in the paper.

scholarly journals Risk assessment and management in domestic water supply system in Pleiku city – Gia Lai province

2019 ◽  
Vol 17 (6) ◽  
pp. 50
Author(s):  
Anh Nguyễn Tuấn ◽  
Kỳ Nguyễn Minh ◽  
Hải Nguyễn Ninh
Keyword(s):  
Risk Assessment ◽  
Water Supply ◽  
Treatment Plant ◽  
Supply System ◽  
Water Supply System ◽  
Water Supply Systems ◽  
Pipeline System ◽  
Domestic Water ◽  
Supply Systems ◽  
Domestic Water Supply

Water is essential for maintaining life, ensuring a safe and continuous supply of water, therefore, it should be given the priority for concerns. Developing countries often face a number of problems with domestic water supply systems such as treatment plants with old technologies, degraded equipment leading to inefficient treatment, and a network of degraded piping, which could cause re-pollution of treated water during transport. Pleiku city, which is located in the Central Highlands of Vietnam, has built two treatment plants and a network of water supply pipelines in the core area. An analysis of the current state of the water supply system including water supply, treatment plant and pipeline system helps identify existing problems in the system. Through mixed methods, hazards or hazardous events are identified as a basis for risk assessment by using semi – quantitative method to assess raw risk and residual risk for each hazard. Priority risks are identified to focus on proposing the possible solutions that will improve the performance and management of domestic water supply systems.

Water Supply, Sewage, and Drainage

1999 ◽  
Author(s):  
Daniel Sperber
Keyword(s):  
Water Supply ◽  
Underground Water ◽  
Great Distance ◽  
Water Supply Systems ◽  
Piping System ◽  
Excessive Pressure ◽  
Piping Systems ◽  
Private And Public ◽  
Planning And Construction ◽  
Supply Systems

It is well known that Erez Yisrael was not blessed with a plentiful supply of water. Other than the narrow winding Jordan, there are few rivers in the country and hardly any fresh water lakes, other than the Sea (!) of Galilee and Huleh Lake (which virtually no longer exists). Consequently, the cities, which required an abundant and regular flow of water, relied mostly on wells and on rainwater trapped in numerous small private and public cisterns. Fountains (springs) might have been situated at considerable distances from the city, and water would have been transported via an open canal (such as in present-day Wadi Kelt between Jerusalem and Jericho), through a closed piping system, which sometimes spanned hills and valleys for many miles, or by aqueducts (such as those near Caesarea). There were also large underground water systems with vent pipes surfacing at regular intervals to relieve water and air pressure and to enable workers to inspect and clear out the silt deposits and other obstructions (witness the magnificent complex bringing water to Jerusalem through the adjacent Armon ha-Naẓiv). There were also overhead pipes made of lead, earthenware, or at times even wood that were laid out carefully above ground, taking advantage of the lay of the land and using gravitational force to transport water over a great distance from a source high in the hills to a city situated low on the plains. Such piping systems required considerable sophistication in planning and construction, not only in choosing optimal routes but also in calculating water pressures and the strengths and diameters of piping units, in placing air vents to relieve excessive pressure, and in installing sludgecocks for removing silt deposits and for filtering the water. A detailed description of different water-supply systems can be found in the work of the great first century C.E. Roman architect Vitruvius in his De Architectura.

scholarly journals Shock Wave Speed and Transient Response of PE Pipe with Steel-Mesh Reinforcement

2016 ◽  
Vol 2016 ◽  
pp. 1-10 ◽  
Author(s):  
Wuyi Wan ◽  
Xinwei Mao
Keyword(s):  
Shock Wave ◽  
Water Supply ◽  
Transient Response ◽  
Wave Speed ◽  
Peak Pressure ◽  
Pipeline System ◽  
Transient Wave ◽  
Steel Mesh ◽  
Transient Wave Propagation ◽  
Water Supply Pipeline

A steel mesh can improve the tensile strength and stability of a polyethylene (PE) pipe in a water supply pipeline system. However, it can also cause more severe water hammer hazard due to increasing wave speed. In order to analyze the influence of the steel mesh on the shock wave speed and transient response processes, an improved wave speed formula is proposed by incorporating the equivalent elastic modulus. A field measurement validates the wave speed formula. Moreover, the transient wave propagation and extreme pressures are simulated and compared by the method of characteristics (MOC) for reinforced PE pipes with various steel-mesh densities. Results show that a steel mesh can significantly increase the shock wave speed in a PE pipe and thus can cause severe peak pressure and hydraulic surges in a water supply pipeline system. The proposed wave speed formula can more reasonably evaluate the wave speed and improve the transient simulation of steel-mesh-reinforced PE pipes.

scholarly journals Ant-colony-based simulation–optimization modeling for the design of a forced water pipeline system considering the effects of dynamic pressures

2009 ◽  
Vol 12 (2) ◽  
pp. 212-224 ◽  
Author(s):  
H. Abbasi ◽  
A. Afshar ◽  
M. R. Jalali
Keyword(s):  
Water Supply ◽  
Ant Colony Optimization ◽  
Optimization Algorithm ◽  
Transient Flow ◽  
Simulation Optimization ◽  
Ant Colony ◽  
Pipeline System ◽  
Ant Colony Optimization Algorithm ◽  
Water Pipeline ◽  
Water Supply Pipeline

Valve and pump shut-off in water pipeline systems lead to transient flow. This flow is a complex phenomenon and is potentially a very serious problem causing extra dynamic pressure in the system. Within the last few decades, the evolutionary and meta-heuristic algorithms, such as genetic algorithms, simulated annealing. More recently, however, ant-colony optimization algorithms have received considerable attention. In this paper the procedure and application of the ant-colony optimization algorithm to the design of a water supply pipeline system, considering dynamic pressures arising from valve closure, is presented. A simulation–optimization interaction loop (SOIL) is defined that cycles between the steady-state and transient flow modules to describe the hydraulics of the pipeline and ant colony optimization algorithm. A hydraulic simulation module is coupled with the ant colony optimization algorithm to form an efficient and powerful software program which locates the pumping stations at any possible or predefined locations while optimizing their specifications, along with pipe diameters, at each decision point. The model may equally regard or disregard the dynamic pressures. Two examples are provided to illustrate the proposed methodology which is limited to the solution of any gravity and/or forced water supply pipeline which is typical for water supply systems.

Application of Three-Dimension Visualization Technology in Water Supply Pipeline Information System Based on VTK

2012 ◽  
Vol 487 ◽  
pp. 558-561
Author(s):  
Cai Ying Zhou ◽  
Long Jun Huang
Keyword(s):  
Information System ◽  
Water Supply ◽  
Underground Water ◽  
Three Dimensions ◽  
Three Dimension ◽  
Underground Pipe ◽  
Visualization Technology ◽  
Water Supply Pipeline

The underground water supply pipeline information system used currently is short of describing the pipe in three dimensions. Aiming at this point, the 3D underground pipe information system was achieved with the help of three-dimension graphics tool (VTK) in this paper. With the system, users can browse the 3D underground pipes and search interrelated datum, which raises the efficiency and standard of city digitizing management.

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