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The Preliminary Research for Water Quality Simulation and Contamination Source Determination of Water Supply Networks

Author: LiHongYan
Tutor: LvMou
School: Qingdao Technological University
Course: Municipal Engineering
Keywords: Water supply system Similar guidelines Experimental model Residual Chlorine Decay Sudden pollution Trihalomethane formation
CLC: TU991.2
Type: Master's thesis
Year: 2009
Downloads: 52
Quote: 0
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Abstract


Urban water supply network system is one of the important infrastructure of the city, charged with the task to the user to ensure that water is also an important part to protect the quality of drinking water pipe network hydraulic, water quality variation pipe network in order to improve water quality, The building hydraulic and water quality models provide an important basis. However, the real water distribution network deep underground complex connections, to be exact understanding of the body of water in which the hydraulic, water quality variation in addition to on-site testing, laboratory simulation, and therefore establish a water supply pipe network simulation The experimental apparatus is necessary. In this study, the experimental simulation platform has been built on the basis of combined analysis software EPANET 2.0 hydraulic, water quality analysis. For various important factors affecting Water Chlorine attenuation, such as pH value, the flow rate of the water body, the initial chlorine concentration, temperature and the like to collect a large number of measured data. Attenuation model using a dynamic model based on the measured data to establish a system of residual chlorine, determine the total residual chlorine attenuation coefficient k, the main residual chlorine in water attenuation coefficient k_b wall at residual chlorine the attenuation coefficient k_w and summed up the residual chlorine attenuation coefficient and the specific relationship of each factor in the future in order to further investigate the attenuation coefficient values ??determined under different conditions corresponding residual chlorine. Experimental study on the basis of the future a better grasp of the variation of the water quality of the actual pipe network to improve the user water quality. Water supply systems are vulnerable to accidental or deliberate pollution damage, unexpected sources of pollution positioning exploratory single pipe network system, combined with EPANET 2.0 (Lagrangian method) and experimental data. Found that when a certain or a combination of the the sudden pollution occurs, has its corresponding specific system water quality variation of each pipe section and each monitoring point pollutants (waters of residual chlorine in this study for the monitoring object) concentration values ??are at a particular moment, appears the peak subsequently dropped, and tend to be stable. Positioning study further unexpected source of pollution in space and time of the actual water supply system based on such characteristics, can be carried out by a large number of measured and simulated data. Trihalomethane formation of harmful substances in water, such as chlorine concentration, humic acid, pH, etc. Related measured and summed up the appropriate law. The pipe network quality control measures in accordance with these laws to reduce the formation of trihalomethanes in the water supply system, to improve the water quality of the pipe network.

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CLC: > Industrial Technology > Building Science > Municipal Engineering > Water supply project ( on the Water Works ) > Clean Water ( water treatment )
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