| Registro completo |
| Provedor de dados: |
Agronomy
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| País: |
Brazil
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| Título: |
Construction and calibration of a bar weighing lysimeter
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| Autores: |
Mariano, Daiane Cinque
Faria, Rogério Teixeira
Freitas, Paulo Sergio Lourenço de
Lena, Bruno Patias
Johann, Andre Luiz
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| Data: |
2015-08-03
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| Ano: |
2015
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| Palavras-chave: |
5.03.02.00-0 evapotranspiration
Water balance
Soil water engenharia de água e solo
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| Resumo: |
Generally, standard lysimeters include a lever-load cell scale, which has become expensive compared to new electronic equipment available for experimental purposes. Currently, lysimeters containing weighing bars with up to 4 load cells are economically feasible. This goal of this study was to present the construction and calibration of four weighing lysimeters built using two rectangular tanks, with a surface area of 1.35 m2 (1 m by 1.35 m) and a depth of 1.5 m, loaded on two weighing bars. Each bar had two high accuracy loading cells connected to a junction box and a datalogger by a coaxial cable. Calibration of each lysimeter was performed after field installation. The results showed a linear response (R2 > 0.9999) of electric signal (mV) to mass increase or decrease (kg) with minimum hysteresis. The mean absolute error of the mass estimate (0.0245 to 0.2844 equivalent-mm) and a Willmott index between the observed and estimated data (d = 1.0000) indicate the high precision of the new equipment. The results allow concluding that the lysimeters in this study are appropriate for estimating evapotranspiration and other components of soil water balance.
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| Tipo: |
Info:eu-repo/semantics/article
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| Idioma: |
Inglês
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| Identificador: |
http://periodicos.uem.br/ojs/index.php/ActaSciAgron/article/view/19368
10.4025/actasciagron.v37i3.19368
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| Editor: |
Universidade Estadual de Maringá
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| Relação: |
http://periodicos.uem.br/ojs/index.php/ActaSciAgron/article/view/19368/pdf_61
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| Formato: |
application/pdf
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| Fonte: |
Acta Scientiarum. Agronomy; v. 37, n. 3 (2015); 271-278
Acta Scientiarum. Agronomy; v. 37, n. 3 (2015); 271-278
1807-8621
1679-9275
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