Luis Juana

TL;DR: Juana et al. as mentioned in this paper derived a derivation of Belanger's theorem for minor head losses at emitter insertions along drip laterals and analyzed the classic formula that includes a friction coefficient \iK multiplied by a kinetic energy term.

TL;DR: In this paper, the friction coefficient K and equivalent length le were determined for various emitter models using analytical and experimental procedures developed in the companion paper by Juana et al. in 2002.

TL;DR: In this paper, approximate analytical expressions were obtained that relate uniformity indices of water distribution in rectangular drip irrigation units as a function of the variables that define that unit: lengths and diameters of laterals and submain, spacing of emitters and laterals, ground slopes, parameters of the emitter discharge equation, and equivalent lengths characterizing local losses.

TL;DR: In this article, the diameters of the laterals and submains were calculated by minimising an objective cost function that includes investment and operating costs of drip irrigation units, including head loss, average operating pressure head, upstream end energy head and distribution uniformity.