Large-demand customers, generally high-density dwellings and buildings, have dedicated ground or elevated water tanks to\nconsistently supply drinking water to residents. Online field measurement for Nonsan-2 district meter area demonstrated that\nintermittent replenishment from large-demand customers could disrupt the normal operation of a water distribution system by\ntaking large quantities of water in short times when filling the tanks from distribution mains. Based on the previous results of\nfield measurement for hydraulic and water quality parameters, statistical analysis is performed for measured data in terms of\nautocorrelation, power spectral density, and cross-correlation. The statistical results show that the intermittent filling interval of\n6.7 h and diurnal demand pattern of 23.3 h are detected through autocorrelation analyses, the similarities of the flow-pressure and\nthe turbidity-particle count data are confirmed as a function of frequency through power spectral density analyses, and a strong\ncross-correlation is observed in the flow-pressure and turbidity-particle count analyses. In addition, physicochemical results show\nthat the intermittent refill of storage tank fromlarge-demand customers induces abnormal flowand pressure fluctuations and results\nin transient-induced turbid flow mainly composed of fine particles ranging within 2ââ?¬â??4
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