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  <titleInfo>
    <title>Use of indirect methodologies for determining the flow ratein water pumping systems</title>
  </titleInfo>
  <name type="personal">
    <namePart>Ferreira, Laura Dias</namePart>
    <role>
      <roleTerm authority="marcrelator" type="text">creator</roleTerm>
    </role>
  </name>
  <name type="personal">
    <namePart>Robaina, Adroaldo Dias</namePart>
    <role>
      <roleTerm authority="marcrelator" type="text">creator</roleTerm>
    </role>
  </name>
  <name type="personal">
    <namePart>Peiter, Marcia Xavier</namePart>
    <role>
      <roleTerm authority="marcrelator" type="text">creator</roleTerm>
    </role>
  </name>
  <name type="personal">
    <namePart>Piroli, Jéssica Dariane</namePart>
    <role>
      <roleTerm authority="marcrelator" type="text">creator</roleTerm>
    </role>
  </name>
  <name type="personal">
    <namePart>Rodrigues, Silvana Antunes</namePart>
    <role>
      <roleTerm authority="marcrelator" type="text">creator</roleTerm>
    </role>
  </name>
  <name type="personal">
    <namePart>Conceição, Chaiane Guerra da</namePart>
    <role>
      <roleTerm authority="marcrelator" type="text">creator</roleTerm>
    </role>
  </name>
  <name type="personal">
    <namePart>Bruning, Jhosefe</namePart>
    <role>
      <roleTerm authority="marcrelator" type="text">creator</roleTerm>
    </role>
  </name>
  <name type="personal">
    <namePart>Pereira, Anderson Crestani</namePart>
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      <roleTerm authority="marcrelator" type="text">creator</roleTerm>
    </role>
  </name>
  <typeOfResource>text</typeOfResource>
  <genre authority="marc">periodical</genre>
  <genre authority="marc">abstract or summary</genre>
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  <abstract>


ABSTRACT:      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.  



Key words:      irrigation efficiency; instrumentation; monitoring</abstract>
  <abstract>


RESUMO:       As  medidas  de  vazão  da  água  são  importantes  para  o  controle  da  prática  de  irrigação.  É  essencial  conhecer  o  valor real desta variável usando métodos alternativos, de baixo custo, facilmente mensurados ou prontamente disponíveis. O objetivo do trabalho foi realizar uma análise comparativa entre diferentes metodologias para determinar a vazão em sistemas de  bombeamento  de  água.  Foram  analisadas  sete  metodologias  com  treze  ensaios  cada.  Selecionou-se  três  ensaios  para  ajustamento e dez para testar as equações. Para o ajustamento foi realizada a correlação entre o valor observado e os valores obtidos pelas metodologias. Posteriormente as equações foram utilizadas para obter as vazões estimadas, para comparação com os valores observados. A análise comparativa ocorreu por meio dos indicadores estatísticos: índice de precisão, índice de concordância, índice de desempenho, raiz quadrática do erro médio e Nash-Sutcliffe efficiency. A metodologia que apresentou melhor ajuste na estimativa da vazão foi o vacuômetro de tubo em U. Dentre os parâmetros testados, a pressão demonstrou melhor desempenho geral com os instrumentos tensiômetro, vacuômetro de Bourdon e vacuômetro de tubo em “U”.  



Palavras-chave:      eficiência da irrigação; instrumentação; monitoramento</abstract>
  <note>

Publicação online; 27 ref.; 3 tables; Summaries (En, Pt)</note>
  <subject>
    <topic>ENGENHARIA  AGRÍCOLA</topic>
  </subject>
  <subject>
    <topic>IRRIGAÇÃO</topic>
  </subject>
  <subject>
    <topic>MANEJO</topic>
  </subject>
  <relatedItem type="host">
    <titleInfo>
      <title>Revista Brasileira de Ciências Agrárias (Brazil)</title>
    </titleInfo>
    <originInfo>
      <publisher>Recife-PE Universidade Federal Rural de Pernambuco 2006</publisher>
    </originInfo>
    <identifier>2026-2072</identifier>
    <identifier type="issn">1981-1160</identifier>
    <identifier type="local">BR2026000621</identifier>
    <part>
      <text>v. 16(2) p. 1-8; (2021)</text>
    </part>
  </relatedItem>
  <identifier type="uri">http://www.agraria.pro.br/ojs32/index.php/RBCA/article/view/v16i2a8534/328</identifier>
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    <url>http://www.agraria.pro.br/ojs32/index.php/RBCA/article/view/v16i2a8534/328</url>
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    <recordCreationDate encoding="marc">260519</recordCreationDate>
    <recordChangeDate encoding="iso8601">20260519194150.0</recordChangeDate>
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      <languageTerm authority="iso639-2b" type="code">eng</languageTerm>
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