Abstract
The storm water drainage network is generally calculated based on the Manning equation, where the slope, roughness of the pipe wall, and flow are known, while conversely the velocity, diameter, and hydraulic radius are unknown characteristics, although they are very important for the work done by a hydraulic engineer who needs these parameters to find their values, including the students taking coursework relating to waste-water engineering. The computation of these parameters in partially full pipes and based on the Manning equation is implicit and needs to be computed using iterative and laborious methods. In this paper, a new, simple and easy method is presented based on a reference pipe with known characteristics (Known Reference Pipe Method: KRPM), as well as the effect of the up-pipe parameters on the down-pipes according to each case that is possible through the watershed drainage system arrangement, for both full and partially filled circular pipes.
Published Version
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