Comportamiento hidráulico de los sistemas de riego por goteo superficial y sub superficial

for their evaluation the irrigation system was mounted with a totally randomized experimental design, with four treatments, one with superficial drip irrigation and three with sub superficial drip irrigation with emitters buried to 15, 30 and 45 centimeters deep. were carried out laboratory and field evaluations of the main hydraulic parameters of the system, to the beginning of the first irrigation campaign and the end of third year, being obtained in the superficial treatment an appreciable decrease of the emitter half flow (qmed), an increase of the deviation of this flow with relationship to the nominal flow (dqnom) and increase of the variation coefficient for obstruction (cvobt) that allows to infer an increase of the emitter obstruction due to precipitate of carbonate of calcium, phosphates and hidróxidos that are formed to the exit from the emitter when entering in direct contact with the atmospheric agents. the statistical coefficient of uniformity (cuest) and the coefficient of uniformity of the lowest 4th (cu25), the values obtained for this index were always high, being understood between 97 and 98%.