Investigation of performance of several type of emitters While using saline water

use of unconventional water resources such as saline water has a special importance, especially in arid and semi-arid areas. Increase potential of emitter clogging with saline water can limit the use of saline water in trickle irrigation. In this research, the performance, the emission uniformity, the uniformity coefficient and other hydraulic characteristics of four kinds of pressure compensated emitters used in Iran, with 8 l/h discharge, while using salinity water (EC=12.75 ds/m), were investigated. To his end, the outlet discharge of emitters, after a month of operation, was measured in six consecutive months and analyzed by applying SAS statistical software. Results indicated that the type of emitter is effective on emission uniformity and hydraulic characteristics. According to statistics, time affected the performance of emitters and reduced it. Eu and qvar for the best emitter (micro flapper) were 94% and 19%, respectively.