EVALUATION OF DRIP IRRIGATION SYSTEM OF DIFFERENT MANUFACTURERS IN FARMERS’ FIELD OF BENGALURU RURAL DISTRICT
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Date
2018-08-01
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University of Agricultural Sciences, Bangalore
Abstract
The study was undertaken in Bengaluru rural district to evaluate and to assess the performance of the different companies drip irrigation systems in farmers’ fields. The farmers’ information was collected from Department of Horticulture. There are 15 farmers’ fields were selected for 5 different companies with 3 fields for each companies. The results of design evaluation showed that, 9 fields having good operating system and the 6 fields are not capable to operate the system, which results in poor performance of the system. The hydraulic parameters such as coefficient of manufacturer variation, emission uniformity,
uniformity coefficient, application efficiency and distribution efficiency are found excellent at both 0.75 and 1.00 kg/cm2 operating pressure for all the irrigation companies, but the emitter flow variation is acceptable only for Jain and Sujay irrigation system at 1.00 kg/cm2 operating pressure. However not acceptable at 0.75 kg/cm2 for all the irrigation companies. The pressure variation between the inlet and outlet is not acceptable at 0.75 kg/cm2 and acceptable at 1.00 kg/cm2 for all the five irrigation companies. The value of emitter exponent and discharge coefficient varied between 0.37 to 0.79 and 2.72 to 3.34 respectively. This indicates that flow is almost turbulent. Hence all company drippers were
found to be in the range of non-pressure compensating. The Jain irrigation company having better hydraulic efficiency followed by Sujay, Godavary, Megha and Vedantha irrigation Company. The cost of installation per acre for all the systems was found to be in the range of Rs. 44000/- to 50000/-.