بررسي و كاربرد رگرسيون چند متغيره در تخمين تلفات تبخير و باد در سيستم آبياري باراني كلاسيك ثابت با آبپاش متحرك

Analysis and modelling of the evaporation and drift losses in semi-portable sprinkling irrigation system

A proper understanding of factors affecting evaporation and drift losses in sprinkler irrigation is important for developing water conservation strategies. In semi-arid areas, the portion of water that might be lost due to wind and evaporation would be significant. The purpose of this study was to obtain formulas by using multiple regression to determine evaporation and drift losses in semi-portable sprinkler irrigation system under different water pressures (45 and 50 m) and weather conditions in south-east region of Khouzestan province. The standard ISO 7749/2 has been taken into account to determine evaporation losses.The type of field test was conducted under single sprinkler condition. The results showed that evaporation and drift losses increased from 20 percent when wind speed exceeded from 15 traps and vapour pressure deficit from 6 kpa. Therefore sprinkler irrigation is not recommended in this condition.