Abstract
ABSTRACT Alaboratory investigation was conducted to study the hydraulic effects of compression deformation of microirrigation drip-tape. Four different tapes were used two of the double chamber, orifice emitter type and two of the single chamber, capillary emitter type. Tape lengths of 30 m were compressed uniformly from circular to elliptical shapes. Head loss and flow measurements agreed closely with values predicted by the Darcy-Weisbach formula incorporating the Blasius friction factor. Compression produced significant head loss in the main chamber as well as some reduction in average emitter flow rate. Results indicated that to maintain a desired pressure variation the lateral's length must be shortened in correspondence to the degree of deformation.
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