scholarly journals Development of the Urban Water Balance Model by Linking Water Distribution and Sewer Networks

2020 ◽  
Vol 20 (6) ◽  
pp. 369-377
Author(s):  
Gunhui Chung ◽  
Won Soo Ohk
Keyword(s):  
Water Supply ◽  
Water Distribution ◽  
Low Impact Development ◽  
Distribution Networks ◽  
Water Circulation ◽  
Urban Water ◽  
Pipe Network ◽  
Sewage Pipe ◽  
Pipe Networks ◽  
Supply Pipe

Due to urban overcrowding, the population density of residential areas and water use per unit are increasing. Therefore, it is necessary to study the flow of water supplied to cities and to improve the healthy circulation of urban water. This study used Modelica, a non-causal analytical program. Using Open Modelica, the researchers constructed a model linking water distribution and sewerage, as the basis of a balanced urban water model. Using the programmer's toolkit provided by EPA-NET and EPA-SWMM, which are commonly used to simulate the existing water supply and sewage pipe networks, Open Modelica-based water distribution networks and sewage pipe networks can be connected and simulated based on the customer block. A model was built so that 90% of the hourly water consumption supplied to the water supply pipe network can be automatically introduced into the sewage pipe network. If a matching table is constructed to connect the nodes of the water supply pipe network and the sewer pipe network, the nodes will reflect in the graphical user interface (GUI) developed in Open Modelica. It was developed to enable modification of links, pumps, tanks, and valves. The 48-hour water supply was simulated using the developed model, and it was confirmed that water supply and sewage networks were successfully connected. In the future, we plan to develop a more expanded and realistic urban water circulation model by considering additional urban water circulation factors, such as sewage treatment, water reuse, rainwater use, storm runoff, and low-impact development facilities. Through this study, it was confirmed that Modelica can simulate changes in the system over time. Since it is a formula-based non-causal simulation language, it is possible to establish and reuse relationships between blocks through block-by-block development of urban water circulation elements. It is expected to contribute to the visualization and concretization of future urban water circulation models.

Analysis of Causes for Pipe Explosion of Urban Water Supply Pipe Network

2013 ◽  
Vol 864-867 ◽  
pp. 2039-2042
Author(s):  
Gao Jie Hang ◽  
Lei Zhang ◽  
He Zhang
Keyword(s):  
Human Factors ◽  
Water Supply ◽  
Urban Water ◽  
Urban Water Supply ◽  
Pipe Network ◽  
Pipe Networks ◽  
Natural Factors ◽  
Supply Pipe

There is a great many reasons for pipe explosion of urban water supply pipe networks. Three major aspects of water supply pipe explosion causes were analyzed comprehensively in this paper: natural factors, pipeline factors and human factors, to raise awareness about the causes of pipe explosion.

Division method for water distribution networks in hilly areas

2015 ◽  
Vol 16 (3) ◽  
pp. 727-736 ◽  
Author(s):  
Tao Tao ◽  
Jiada Li ◽  
Kunlun Xin ◽  
Peng Liu ◽  
Xiaolan Xiong
Keyword(s):  
Water Supply ◽  
Distribution Systems ◽  
Water Distribution ◽  
Water Distribution Systems ◽  
Distribution Networks ◽  
Pipe Network ◽  
Assessment Index ◽  
Supply Pipe ◽  
Low Degree ◽  
Pressure Limitation

Water distribution systems in hilly areas are always divided into several zones due to the undulating terrain. The present approach of dividing water distribution systems lacks an assessment index and is characterized by a low degree of automation. With the building of a mathematical model, this paper introduces two indicators – pressure limitation and pressure variation – to enable the automatic division of the water supply pipe network. It prioritizes economic index as the objective function in the evaluation of the division of water distribution systems in hilly areas, and then selects the optimal division scheme by generic algorithm in a large number of candidates. The SY terrain in YW City China is used for verification. Compared to traditional water supply partition methods, this procedure is easier to operate time-savingly by staff and is more automatic.

scholarly journals Elevation Effect in Urban Water Distribution Model

2018 ◽  
Vol 153 ◽  
pp. 09001
Author(s):  
Rangsan Wannapop ◽  
Thira Jearsiripongkul ◽  
Krit Jiamjiroch
Keyword(s):  
Water Supply ◽  
Water Distribution ◽  
Supply System ◽  
Distribution Model ◽  
Pipeline System ◽  
Urban Water ◽  
Main Pipeline ◽  
Pipe Network ◽  
Pipeline Network ◽  
Water Distribution Model

Metropolitan Waterworks Authority (MWA) is Thailand's national government agency responsible for the supply of water to 3 provinces Bangkok, Nonthaburi and Samut Prakan with more than 2,384.9 km2 of service area and 2,281,058 consumers in the year 2016. Bangkok, which is both the capital and the economic center of the country, is densely populated. Consequently, there is a huge demand for water; MWA has to supply 5.914 million cubic meters of water per day. Because the metropolitan water supply area is a densely populated city, the water supply system is very complex like a spider’s web. For this reason, MWA has adopted EPANET software for its water supply managing tool in the main pipeline system. There are some mistakes in the main pipe network; the elevations of the nodes are not assigned, so there are some errors. In this study, we have assigned elevations for all nodes on the pipeline network based on mean sea level (MSL). After adjusting the elevation of each node, it was found that the new pipeline network has increased the correlation between means to 0.893 from the existing model mean of that is 0.803 of accuracy up 0.09 (11.2%).

Optimal design of urban water supply pipe networks

2015 ◽  
Vol 13 (5) ◽  
pp. 521-535 ◽  
Author(s):  
Ioan Sarbu ◽  
Gabriel Ostafe
Keyword(s):  
Optimal Design ◽  
Water Supply ◽  
Urban Water ◽  
Urban Water Supply ◽  
Pipe Networks ◽  
Supply Pipe

scholarly journals Optimal layout of pressure monitoring points in water supply network based on Optics

2019 ◽  
Vol 79 ◽  
pp. 01015 ◽  
Author(s):  
ChenLei Xie ◽  
QianSheng Fang ◽  
HongYan Zhang ◽  
JiXin Zhang
Keyword(s):  
Water Supply ◽  
Water Distribution ◽  
Distribution Networks ◽  
Water Distribution Networks ◽  
Urban Water ◽  
Supply Network ◽  
Pressure Monitoring ◽  
Monitoring Point ◽  
Water Supply Network ◽  
Spatial Attributes

It is necessary to monitor the pressure in the networks in real time, when we face the problem of pipe burst and leakage in urban water supply network. Therefore, it is particularly important to arrange pressure monitoring points in appropriate places in the pipeline networks. The pressure monitoring point layout is often based on similar degree of the node pressure data in the current stage. A method of optimal pressure monitoring point location in the urban water distribution networks was proposed in this paper. Since the above method did not consider spatial properties of network node. The original feature matrix data is constructed by acquiring the spatial attributes of the pressure monitoring nodes and calculating the non-spatial attributes of the nodes. The original feature matrix data will be normalized. Then the Optics clustering algorithm is used to cluster the normalized node feature matrix data to determine the location and number of pressure monitoring points in monitoring area of urban water distribution networks. Experimental results show that the method effectively ensures that the pressure monitoring points can grasp the pressure information of the whole water supply network more comprehensively and rationally, improves the economy of the pressure monitoring points layout, and provides good guidance for the actual layout of pressure monitoring points in municipal water distribution networks.

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