HYDRAULIC PERFORMANCE EVALUATION OF MINI SPRINKLER SYSTEM 1807
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Date
2013-10
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Abstract
Irrigation system performance assessment is of high priority in irrigation
research to solve the problem of irrigation development & management. It is obvious
that many irrigation systems are performing below their capacity. This situation may
lead to non-uniform and unreliable water distribution. The performance assessment
alone is not sufficient to evaluate an irrigation system, so to present a true image, a
cost estimation of the system is also done, which includes both capital investment &
working cost. The mini sprinkler systems recently introduced for irrigation needs to
be evaluated for their performance.
A mini sprinkler system was evaluated for its hydraulic performance.
Experiment was conducted to evaluate the hydraulic performance using a mini
sprinkler system having 'double nozzle - full circle sprinkler at various sprinkler
spacings (8m x 8m, 10m x 10m and 12m x 12m) at three operating pressures (1.0, 1.5
and 2.0 kg/cm ). The index of jet break up was obtained in all the three operating
pressures in the range of 2.63 to 4.65, however ideal value of index of jet break up
was obtained close to 4.0 at 1.5 kg/cm^. Uniformity coefficient for all the system
arrangements was in the range of 79.14% to 87.68%. The uniformity coefficients
were obtained at par for 8m x 8m spacing at 2.0 kg/cm^ and 10m x 10m spacing at 1.5
kg/cm^. Cost analysis shows that the annual cost of all the systems ranges from Rs.
13663 to Rs. 20729. The spacing of 10m x 10m at operating pressure of 1.5 kg/cm^
showed better hydraulic performance with economical feasibility.
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SOIL AND WATER ENGINEERING