نوع مقاله : مقاله پژوهشی
نویسندگان
1 عضو هیأت علمی مؤسسه تحقیقات خرما و میوههای گرمسیری کشور
2 استاد دانشگاه فردوسی مشهد
چکیده
کلیدواژهها
عنوان مقاله [English]
نویسندگان [English]
Subsurface irrigation with porous pipes is among the microirrigation methods widely used in recent years. However consideration of the hydraulic properties of these pipes is part of the system evaluation. In this reseach porous pipes were tested under 6 different operating pressures. Relationships for discharge-pressure, discharge variation in lateral length, changing discharge with time, coefficients of variation, emission uniformity, and coefficient of uniformity were obtained. Data were analysed based on American Society of Agricultural Engineers (ASAE) Standards. The results showed that the operating pressure and time had significant effects on tested parameters and that the porous pipes which are available in Iran are not acceptable for use in irrigation.
کلیدواژهها [English]