Influence of the wind on water application uniformity of a mechanical lateral move irrigation equipment using rotating plate sprinklers

Faria, Lessandro Coll; Beskow, Samuel; Colombo, Alberto; Nörenberg, Bernardo Gomes; Neto, Osvaldo Rettore; Simões, Matheus Chagas

doi:10.1590/0103-8478cr20141558

Cited by 16 publications

(10 citation statements)

References 12 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Ribeiro et al (2012), reports that among the climatic factors, the wind was the factor that most influenced the uniformity of water distribution. Faria et al (2016), Justi, Vilas Boas and Sampaio (2010) and Frigo et al (2013) which state that with increasing wind speed, the uniformity of water distribution decreases, made the same report. In a survey for sprinkler irrigation evaluation, Justi, Vilas Boas and Sampaio (2010) concluded that the process capability index was directly proportional to the uniformity of distribution.…”

Section: Descriptive Statistics Of the Datamentioning

confidence: 65%

Techniques for Quality Control in Football Field Located in Agricultural Area

Siqueira¹,

Boas²,

Siqueira³

et al. 2018

JAS

View full text Add to dashboard Cite

A set of eight sprinklers was evaluated in a soccer field located in the city of Cascavel, Paraná, Brazil, using quality control techniques. The graph X (Shewhart's individual control card), the EWMA graph (exponentially weighted moving average) and the CUSUM tabular graph (cumulative sum) were used. The system was composed of two parallel lateral lines distanced of 18 meters, containing five sprinklers in each line every 18 meters. The first four sprinklers (area A) and the last four (area B) were evaluated with 25 trials of 10 minutes of irrigation for each area, with the monitoring of climatic effects. For the evaluation of the system, the distribution uniformity coefficient (DU) was used, obtaining in the area A and B the values of 68.72 and 70.0%. This low value can be justified by the high wind velocity during the tests, that varied from 0.57 to 8.5 m s -1 . By Shewhart's control chart, the irrigations of both areas were under control. From the CUSUM chart, only area B was under control. From the EWMA chart, both areas were out of control, being considered the most suitable for evaluation of the system because it detected the small variations in the process.

show abstract

Section: Descriptive Statistics Of the Datamentioning

confidence: 65%

Techniques for Quality Control in Football Field Located in Agricultural Area

Siqueira¹,

Boas²,

Siqueira³

et al. 2018

JAS

View full text Add to dashboard Cite

show abstract

“…According to the regression equation, a 2.5 m s -1 wind speed led to a water jet length of 14.3 m. Therefore, besides the increase in sprinkler spacing, wind speed also causes reduction in the overlapping of the applied water depths and, consequently, reduction in the irrigation distribution uniformity. Reduced wind speed values are vital to ensure an adequate irrigation efficiency, especially for sprinkler systems, since such variable might result in major impacts on water application and distribution (Keller and Bliesner 1990;Faria et al 2016). A strategy to overcome such problem is the practice of overnight irrigations since it might be a way to reduce the effects of high wind speed.…”

Section: Resultsmentioning

confidence: 99%

“…Particularly for sprinkler systems, the uniformity is related not only to its mechanical aspects (flow rate, operating pressure, spacing, nozzle diameter, etc. ), but also to meteorological conditions, especially wind direction and speed (Keller and Bliesner 1990;Faria et al 2016). Its estimate is frequently evaluated based on the uniformity coefficients.…”

Section: Introductionmentioning

confidence: 99%

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

et al. 2022

View full text Add to dashboard Cite

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.

show abstract

“…Thus, u 2 values were low in tests 1, 2, 3, 7, 8, and 9 and high in tests 4, 5, and 6 (Table 3). Low u 2 values are essential for the quality of precipitation tests, especially in sprinkler systems, in which this meteorological variable has a major impact on the application and distribution of water (Faria et al, 2016). According to ASAE (American Society of Agricultural Engineers [ASAE], 2001), the accuracy of this test procedure for the assessment of a linear system and center pivot decreases when wind speed exceeds 1 m s −1 .…”

Section: ∆ S (T) − [Rh × S (T)]mentioning

confidence: 99%