Coeficientes de uniformidade em aspersores de baixa vazão com diferentes arranjos e altura da haste

Rodrigues, Leoncio Gonçalves; Nery, Aparecida Rodrigues; Sousa, Francisco Rondynelle Rodrigues; Rodrigues, Luis N.

doi:10.18378/rvads.v14i2.6016

Cited by 5 publications

(6 citation statements)

References 3 publications

(9 reference statements)

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“…Many studies have been conducted aiming to evaluate and define projects of irrigation systems based on their water distribution uniformity (Mohamed et al 2019;Rodrigues et al 2019;Araújo et al 2020;Filgueiras et al 2020). However, studies evaluating irrigation systems for soccer fields are insufficient in the literature.…”

Section: Introductionmentioning

confidence: 99%

Uniformity of water distribution by a sprinkler irrigation system on a soccer field

et al. 2022

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Soccer field grass can be compared to highly sensitive crops regarding water deficit and must be irrigated throughout the year to provide decent conditions for use. For this, efficient irrigation systems are necessary to save water and energy, and this is possible, provided that they are evaluated. Therefore, this paper evaluated the water distribution uniformity, by different methodologies, for an irrigation system installed in a grass soccer field. Also, the influences of multiple spacings between sprinklers and meteorological factors on the final results were assessed. The irrigation system had Falcon 6504 sprinklers, operating at the pressure of 320 kPa. Six field essays were conducted considering overlaying water depths originated from the same irrigation system considering spacings between sprinklers varying from 6 m x 6 m, 6 m x 9 m, 9 m x 9 m, 9 m x 12 m, 12 m x 12 m, 12 m x 15 m, 15 m x 15 m, 15 m x 18 m, 18 m x 18 m, 18 m x 21 m, 21 m x 21 m, 21 m x 24 m, 24 m x 24 m, 24 m x 27 m, 27 m x 27 m, 27 m x 30 m and 30 m x 30 m. The uniformity coefficients used were: Christiansen uniformity coefficient (CU), distribution uniformity coefficient (DU), absolute uniformity coefficient (UA), statistical uniformity coefficient (US), Hart uniformity coefficient (UH) and HSPA standard efficiency (UHSPA). Meteorological data were obtained during the essays. Wind speed caused reduction in the length of the water jet applied by the sprinkler and also caused a bigger effect on the water distribution uniformity. Both CU and UH showed higher values compared to the other coefficients. The increase in the spacing between the sprinklers resulted in reduced water distribution coefficients. To comply with technical and economic criteria, an arrangement of 12 m x 15 m between the Falcon 6504 sprinklers, operating at a 320 kPa pressure, is recommended.

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Section: Introductionmentioning

confidence: 99%

Uniformity of water distribution by a sprinkler irrigation system on a soccer field

et al. 2022

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“…Holzapfel et al (2007) also found that the cost of the irrigation system increased with increasing AI, noting that the flow rate of the sprinklers was the factor with the greatest effect. In addition, Rodrigues et al (2019) found that sprinklers with higher AI have lower costs and greater benefits than those with lower AI. AI increases, the costs decrease.…”

Section: Influence Of the Rainfall Intensitymentioning

confidence: 99%

“…The correlation between AI and EC was negative, with a value of -0.48 (Table 2), which shows that when OP and S spr are kept constant, as AI increases, the EC decreases; this reduction in EC is influenced by the irrigation time. According to Rodrigues et al (2019), sprinklers with high AI generally take less time to complete irrigation. The correlation between AI and NL lat was -0.59; therefore, an increase in AI results in a slight decrease in NL lat .…”

Section: Influence Of the Rainfall Intensitymentioning

confidence: 99%

Influence of sprinkler operational parameters on the cost of conventional sprinkler irrigation systems

Tambo

Deus

Lima

et al. 2021

Revista Ciência Agronômica

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The criterion used to select sprinklers in a conventional sprinkler irrigation system is based, in a first instance, on the water application intensity, which must be lower than or equal to the soil's basic infiltration velocity. However, other operating factors must be considered in the selection of sprinklers because these factors can influence the total annual cost of the irrigation system. Therefore, this paper aimed to evaluate the influence of the operation parameters of different commercial models of sprinklers on the cost of a conventional semifixed sprinkler irrigation system. The simulated variables were the operating pressure, the spacing between sprinklers, and the water application intensity of different sprinkler models available in the Brazilian market. We found that the operating pressure and flow variables most influenced the total annual cost of a conventional sprinkler irrigation system and must be considered in the project cost analysis so that the sprinklers that best suit the project can be selected.

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“…Em que: LLI é a lâmina líquida de irrigação (mm); LBI é a lâmina bruta de irrigação (mm); e Ef é a eficiência de aplicação de água do sistema de irrigação por aspersão convencional (decimal). Apesar de diversos autores como Frigo et al (2016) e Rodrigues et al (2019) citarem que, geralmente, em sistemas de aspersão convencional a eficiência de aplicação de água está entre 80 a 90%, nesse software introduziu-se uma caixa de texto onde usuário pode digitar o valor de eficiência que pretende considerar para o seu projeto. A recomendação é, entretanto, de 80 a 90%.…”

Section: Lli = Etc Trunclassified

“…A escolha pelo uso da irrigação por aspersão convencional deve-se ao fato deste sistema de irrigação ser o mais econômico no uso da água, em comparação com os sistemas de irrigação superficial (Frigo et al, 2016;Rodrigues et al, 2019). Este sistema também, apresenta menor necessidade de manutenção e possibilita o uso de águas de menor qualidade, quando comparados com irrigação localizada (Rodrigues et al, 2013).…”

Section: Introductionunclassified

Easyspray: software para dimensionamento de sistemas de irrigação por aspersão convencional em regiões moçambicanas

Tambo¹,

Thebaldi²,

Lima³

2020

REGA

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Coeficientes de uniformidade em aspersores de baixa vazão com diferentes arranjos e altura da haste

Cited by 5 publications

References 3 publications

Uniformity of water distribution by a sprinkler irrigation system on a soccer field

Uniformity of water distribution by a sprinkler irrigation system on a soccer field

Influence of sprinkler operational parameters on the cost of conventional sprinkler irrigation systems

Easyspray: software para dimensionamento de sistemas de irrigação por aspersão convencional em regiões moçambicanas

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