Study Of Hydraulic And Quality Characteristics In Water Distribuition System

The distribution network is an important part in the whole water supply systems,and it plays a key role in protecting security of water supply. The recontaminationduring distribution network has been receiving considerable attention, and theconception of biosability of drinking water also has been bring forward. To control thebacterial regrowth is a key issue in attempt to increase the biosability of drinking water.Contamination and material in the biofilm may subsequently be released into theflowing water under various circumstances. As a result, biofilms can act as aslow-release mechanism for persistent contamination of the water.This paper study from a real water supply distributing system, to persue a betterhydraulic model, we presents a method using Moore-Penrose inverse solution tocalibrate the water status in real-time water supply distribution systems, purpose tosolve the problem of pressure and flow monitor inadequation. As the pressure and flowmonitoring values that provided by SCADA system to be the inputs of underdeterminednonlinear equations and nodel demande to be the outputs, this method use the generalinverse equations to construct search vectors for iterations which can solve thenonlinear hydraulic equations. After the caculation, we can use nodal demand values tosolve unmonitored node pressure and check the pipe flow. The case study is anapplication of real-life water distribution system of a rural community in the east ofChina. Results have shown that this method is suitble for water distribution systemswith inadequate pressure and flow monitors, for the analog pressure values were highlyconformed with the actual values.When we explore the biofilm impacts on water quality in the water supply network,We used a discarded pipe to make sure the experiment water have the same quality withreal situation. The experiment results reflected the relationship between the residualchlorine and microbial biomass, and there is some correlation with the actual pipenetwork water test results. As the good experiment results, we can speculate thechanging of water quality depends on temperature. It was also considered the effect ofpH, and the results proved that microbiological gradually reduced in pace with a lowerpH value. From the experiment, we can also see that spring is microbiologic’s activeperiod, we should put on a forceful measurement to protect our water quality.Based on an real-time water distribution system, if we can find out the relationship between microbiologic and chlorine and combine with EPANET, then we can grasp themicroorganism about water quality in the whole water distribution system. It helps a lotfor us to manage water quality in distribution system, and gives us a forcefulmeasurement to protect our water quality.