Energy, cost and uniformity in the design of drip irrigation systems

Abstract

A novel approach for the design of drip irrigation systems is presented. The diameters ofthe laterals and submains were calculated by minimising an objective cost function thatincludes investment and operating costs of drip irrigation units. Diameters, head loss andits distribution between laterals and submain, average operating pressure head, upstreamend energy head and the distribution uniformity were all deduced from an economicapproach. These variables are not matched alone but are the consequence of the economicoptimisation. Several examples with self-compensating and non-compensating emittersfed from either a pump station or a water reservoir are presented to illustrate the feasibilityof the proposed methodology.