Abstract：It studied the simulation of water supplying systems. Generally, partof the pipeline resistance parameters could be measured, but they are insufficientfor the determination of the system state. Based on the calculation method of adirect circuit, the least square fitting method was used on the sampling data. Inthis way a math model getting the unknown pipeline resistance parameters was builtup and the system state could be determined. The model could be referenced to thedesign of irrigation nets etc.
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