Author(s)

T.Koppel, N.Kandler, A.Vassiljev

Abstract

Calibration of the water distribution network model T. Koppel\ N. Randier* & A. Vassiljev* * Department of Mechanics, ^Department of Environmental Engineering, Tallinn Technical University, Estonia Abstract As a rule models for water distribution systems have to be calibrated for better reflection of the behaviour of the real system. As the first step of calibration the distribution of water losses due to leakage must be studied. Two approaches are proposed in order to calculate the leakage from pipes. The first of them uses an empirical formula which takes into account the length of pipe and mean pressure. This leakage is carried to the terminal nodes and distributed between the nodes proportionally to the pressure in the nodes. For evaluation of pressure in the nodes an iteration process is applied which determines the leakage and pressures intermittently. The second approach uses differences between the measured and calculated pressures. Areas with underestimated and overestimated pressu

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