Dynamic Simulation of Pressure Head and Chlorine Concentration in the City of Asyut Water Supply Network in Abnormal Operating Conditions

2011 ◽  
Vol 36 (2) ◽  
pp. 173-184 ◽  
Author(s):  
Hassan Ibrahim Mohamed ◽  
Gamal Abozeid
Keyword(s):  
Water Supply ◽  
Dynamic Simulation ◽  
Pressure Head ◽  
Operating Conditions ◽  
Chlorine Concentration ◽  
Supply Network ◽  
Water Supply Network ◽  
Abnormal Operating Conditions ◽  
The City

scholarly journals PUBLIC ENVIRONMENTAL MONITORING OF DRINKING WATER QUALITY IN THE CITY OF NORILSK

2021 ◽  
pp. 104-111
Author(s):  
N. V. Karmanovskaya
Keyword(s):  
Drinking Water ◽  
Water Supply ◽  
Salt Content ◽  
Supply Network ◽  
Water Supply Network ◽  
Industrial Region ◽  
Quality Of Water ◽  
The City ◽  
Concentration Of Impurities

According to UN estimates, the shortage of safe drinking water can become one of the most acute and pressing problems. The specificity of this problem for Russia is not a shortage of water resources, but their pollution and ongoing degradation of water bodies. The quality of water is understood as the totality of its properties associated with the nature and concentration of impurities in the water. Water analysis is the only tool for monitoring its condition and properties. During the experiment, a team of researchers took samples of drinking water from the water supply network in various districts of the Norilsk industrial region, studied the dependence of the quality characteristics of water on the location and sampling method. Based on the findings, conclusions on the quality of drinking water were drawn. During the experiment, the authors found that in terms of organoleptic indicators, drinking water in all areas of the NIR meets the requirements of Sanitary Rules and Regulations and GOST. Taking samples at three control points of the Norilsk industrial region, it has been proven that the water is soft and its salt content is mainly due to the presence of hardness salts. Having made the necessary analyses, the authors found that the presence of microorganisms in the water supply network of the NIR is not significant, the permanganate oxidisability indicator does not exceed the requirements of Sanitary Rules and Regulations.

Disinfection by-products in Croatian drinking water supplies with special emphasis on the water supply network in the city of Zagreb

2020 ◽  
Vol 276 ◽  
pp. 111360 ◽  
Author(s):  
L. Kurajica ◽  
M. Ujević Bošnjak ◽  
M. Novak Stankov ◽  
A.S. Kinsela ◽  
J. Štiglić ◽  
...  
Keyword(s):  
Drinking Water ◽  
Water Supply ◽  
Supply Network ◽  
Water Supplies ◽  
Water Supply Network ◽  
The City ◽  
By Products

scholarly journals Development of a Leakage Control System at the Water Supply Network of the City of Patras

2016 ◽  
Vol 162 ◽  
pp. 553-558
Author(s):  
Irene Karathanasi ◽  
Constantinos Papageorgakopoulos
Keyword(s):  
Control System ◽  
Water Supply ◽  
Supply Network ◽  
Water Supply Network ◽  
Leakage Control ◽  
The City

Research on Hydraulic Model Establishment of Water Supply Network

2014 ◽  
Vol 1073-1076 ◽  
pp. 1027-1030
Author(s):  
Xin Zhang ◽  
Kun Zhang ◽  
Rui Ying Wu
Keyword(s):  
Water Supply ◽  
Real Time ◽  
Hydraulic Model ◽  
Operating Conditions ◽  
Security Evaluation ◽  
Supply Network ◽  
Pipe Network ◽  
Monitoring Point ◽  
Water Supply Network ◽  
Network Status

Under the existing technical and financial conditions, we can not do real-time monitoring of the water supply network in each point. The hydraulic model establishment has created favorable conditions for simulating pipe network hydraulic model.According to the information from pressure monitoring point of water supply pipe network , we can use batch adjustment principle to analyze the calculated variables’ value. With limited resources to simulate real-time network status, build pipe water conservancy network model and simulate network real-time operating conditions. Hydraulic model provides the basis for the water supply network security evaluation, scheduling scheme, pumps and piping renewal.

scholarly journals A Comparative Study on a Hydraulic and Water-Quality Analysis Method for Determining Rechlorination Injection Points for a Water-Supply Network

Water ◽  
2019 ◽  
Vol 11 (4) ◽  
pp. 697 ◽  
Author(s):  
Sang Myoung Lee ◽  
Ho Min Lee ◽  
Do Guen Yoo ◽  
Joong Hoon Kim
Keyword(s):  
Water Quality ◽  
Water Supply ◽  
Water Pressure ◽  
Pressure Head ◽  
Quality Analysis ◽  
Residual Chlorine ◽  
Supply Network ◽  
Water Quality Analysis ◽  
Water Supply Network ◽  
Proposed Model

Water supply facilities are vulnerable to extreme weather events, such as droughts and floods. To establish a sustainable solution that resists accidents and disasters, a distributed system is required. To supply high-quality tap water using the existing water-supply network, rechlorination facilities must be installed to secure residual chlorine at the pipe end. In this study, a process is developed to determine the injection points and dosages of rechlorination using the latest pressure-driven analysis. The method was compared to the results of demand driven analysis methods. The proposed model was applied to P City in Korea to draw results. A detailed evaluation was performed to study how water pressure head and demand-based hydraulic and water quality analysis results impact the injection points and dosages of rechlorination. Thus, the existing demand-based model shows significant spatial deviations in the pressure head in the presence of water pressure drops, which subsequently lead to over-estimation of chlorine injection dosages for maintaining the concentration of residual chlorine. However, the proposed model involves a numerically validated theory and draws more reasonable results for hydraulic, water quality, and rechlorination dosages. The proposed model can be used as a decision-making tool based on hydraulic analysis for the supply of water of a stable quality.

scholarly journals A Study on the Delineation of Flushing Sections and Simulation Method to Verify Appropriate Flushing Velocity for Applying Flushing

2020 ◽  
Vol 20 (5) ◽  
pp. 255-264
Author(s):  
Suri Kim ◽  
ARin Gim ◽  
Jeongtae Ha ◽  
Jinhyeok Kim ◽  
Hwandon Jun
Keyword(s):  
Water Supply ◽  
Flow Velocity ◽  
Flow Condition ◽  
Flow Direction ◽  
Pressure Head ◽  
Water Source ◽  
Supply Network ◽  
Water Supply Network ◽  
Source Point ◽  
Primary Water

Recently, water supply networks have experienced deterioration because of various factors, which result in the accumulation of a large amount of scale on the inside surface of pipes. The scale may enter houses when a surge occurs owing to abrupt velocity or flow direction change in pipes, and eventually, water quality accident such as red-water can occur. The scale should be removed by applying pipe-cleaning practices, such as flushing, to prevent this type of accident. Currently, most studies have suggested only the desirable flow velocity to remove the scale through flushing. In our opinion, it will be more critical to develop a method for determining whether it would be possible to achieve the desired flow velocity. Hence, we developed a method to delineate a flushing section and modify a water supply network in considering the minor loss on the hydrant using the head loss-flow rate curve for the hydrant. Next, we simulated a flow condition using the emitter coefficient to achieve the desired flow velocity for flushing each section. The proposed method was applied to a part of the water supply network of a city in Korea. From the results, the pressure head at the primary water source point of the network was sufficient such that each flushing section experienced the desired flow velocity to complete the flushing process. We lowered the pressure head by 20 m at the primary water source point and simulated a flow condition for insufficient pressure head. Under these conditions, some of the flushing sections could not experience the desired flow velocity, and hence, the scale could not be removed as desired. In this case, we believe that the utility authority should decide whether flushing is still a suitable option for cleaning the pipe, or whether other cleaning methods should be considered.

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