Flow rate sprinkler development for site-specific irrigation |
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Authors: | Robson Andr�� Armindo Tarlei Arriel Botrel Tiago Capello Garzella |
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Institution: | (1) Universidade Federal do Paran?, Rua dos funcion?rios, 1540-Bairro Juvev?, Curitiba, PR, 80035-050, Brazil;(2) Universidade de S?o Paulo, S?o Paulo, Brazil |
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Abstract: | Due to the rapid depletion of water resources, water must be used more efficiently in agriculture to maintain current levels
of yield in irrigated areas. The efficiency of irrigation systems can be increased by adjusting the amount of water applied
to specific conditions of soil and crop, which may vary in a field. Taking into account spatial and temporal variability,
it is evident that an equipment capable of providing different irrigation levels is necessary to meet the water requirement
of the soil. This work aims to develop and evaluate a flow rate sprinkler to be used in center pivots or linear moving irrigation
systems, with potential for utilization in irrigation scheduling. A prototype was developed by duplicating its calibrations,
and discharge coefficient adjustment was carried out in the laboratory. To predict the flow rate, a successful model that
represented the operation of the flow rate sprinkler was established. The calibration of the flow rate sprinkler prototype
showed satisfactory statistical and technical results. Automation of the prototype was achieved by driving a step motor using
communication from the parallel port of a microcomputer, which was controlled by a software developed for this purpose. The
results were satisfactory and technically feasible. |
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