Investigação de variável adequada ao controle automático de vazão sem uso de sensores em campos irrigados por meio de análise multivariada

Canafístula, Francisco José Firmino; Lopes, Fernando Bezerra; Soares, Rogério Barbosa; Andrade, Eunice Maia de; Teixeira, Adunias dos Santos

doi:10.1590/s0103-84782010001100011

Cited by 1 publication

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“…It can be seen in Figure 2 (C) that the values observed in the discharge pressure represent a better indicator in the flow rate monitoring, with a linear coefficient (a) of 0.1097 and an angle coefficient (b) of 1.0251. These results are in contrast with the results of Canafístula et al (2010), in which they obtained a better indication of flow rate monitoring using suction pressure as the monitoring tool.…”

Section: /8contrasting

confidence: 99%

Use of indirect methodologies for determining the flow rate in water pumping systems

Ferreira

Robaina

Peiter

et al. 2021

Agraria

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Water flow rate measurements are important for monitoring the irrigation practice. It is essential to find the real value of this variable using alternative low-cost methods which are easy to use or readily available. This study aimed to perform a comparative analysis among different methodologies for determining the flow rate in water pumping systems. Seven methodologies were analyzed, with 13 tests each. Three tests were done for adjustment and ten to test the equations. The correlation between the observed value and the values obtained by the methodologies was performed for the adjustment. The equations were subsequently used to obtain the estimated flow rate for comparison with the observed values. The comparative analysis was performed through the following statistical indicators: Precision Index, Agreement Index, Performance index, Root mean square deviation and Nash-Sutcliffe efficiency. The methodology which showed the best adjustment in the flow estimation was the U-tube vacuometer. The pressure showed the best general performance among the tested parameters with the Tensiometer, Bourdon vacuum gauge and U-tube vacuum gauge instruments.

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Section: /8contrasting

confidence: 99%