Development and validation of a modified model to simulate the sprinkler water distribution

Li, Yongchong; Bai, Geng; Yan, Haijun

doi:10.1016/j.compag.2014.12.003

Cited by 41 publications

(29 citation statements)

References 19 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Engenharia Agrícola, Jaboticabal, v.40, n.1, p.24-33, jan./feb. 2020 Among the various causes that affect the distribution uniformity of a sprinkler irrigation system, special attention should be given to working pressure and wind speed and direction (Li et al, 2015). Variation of these factors is undesirable, as they tend to reduce the distribution uniformity coefficient.…”

Section: Resultsmentioning

confidence: 99%

Predictive Models of Water Application and Distribution Efficiency in Conventional Sprinkling

et al. 2020

View full text Add to dashboard Cite

Correct determinations of distribution (Ed) and application (EA) efficiencies allow adequate estimations of the gross irrigation depth. This study aimed: i) to determine the distribution efficiency using the Christiansen uniformity coefficient (CUC) in a sprinkler irrigation system under different weather conditions and working pressures; ii) to compare the mean, median, and cumulative CUC values; and iii) to evaluate the predictive capacity of four EA estimation models.CUC values were determined from 80 assessments, as well as the mean, median, and cumulative. The precipitated water depth accumulated in each collector was considered for the accumulated CUC. More uniform evaluations were used for EA (working pressure of 196 kPa), resulting in 20 samples. Besides being measured, EA was estimated by Keller & Bliesner, Playán, Tarjuelo, and Beskow methods. Statistical indicators were the root mean square error, mean bias error, Willmott agreement index, mean absolute error, and Pearson correlation coefficient.CUC values ranged from 66.51 to 92.04%, and the accumulated CUC provided an improvement over the isolated evaluations. The Beskow model had the best EA estimations in conventional spraying.

show abstract

Section: Resultsmentioning

confidence: 99%

Predictive Models of Water Application and Distribution Efficiency in Conventional Sprinkling

et al. 2020

View full text Add to dashboard Cite

show abstract

“…Li et al proposed a method for simulating droplet motion using modified mathematical models of droplet dynamics and evaporation, and also developed the corresponding software. Based on the given radial leg water distribution data of a single sprinkler, the software can predict water distribution of a single sprinkler or a solid-set sprinkler irrigation system under various sprinkler spacing and different environmental parameters [17] . Faria et al and Siyanda et al simulated the impact of wind on water distribution patterns [18,19] .…”

Section: Introductionmentioning

confidence: 99%

Effect of terrain slope on water distribution and application uniformity for sprinkler irrigation

Zhang

Hui

Chen

2018

International Journal of Agricultural and Biological Engineering

View full text Add to dashboard Cite

Abstract:In order to provide practical parameters for sprinkler irrigation system design on slope land, the effects of terrain slope on water distribution, sprinkler throw radius and water application uniformity were analyzed for the Rainbird LF1200 sprinkler. The results show that, the water distribution curve is roughly "heart-shape" on slope land, and the water has the trend of focusing on the upslope with the increase of the slope. Throw radius decreases for the upslope and increases for the downslope as the slope increases. For the convenience of sprinkler irrigation system design on slope land, a formula for computing throw radius on slope land was put forward by the theoretical derivation, and it was verified by the experimental data. The impact of sprinkler pressure and spacing on CU for slope land is more significant than that for flat ground. Under the experimental condition, no significant change is found regarding the influence of terrain slope on water application uniformity at the confidence level of 95%. Taking irrigation quality and economy into account, the Rainbird LF1200 sprinkler should be operated at the manufactures' recommended pressure, rather than low pressure, with sprinkler spacing from 8 m×8 m to 10 m×10 m below the slope of 0.15 in practice.

show abstract

“…province in Kurdistan), the results confirmed that it is not possible to use a single achieved result as a guide for a variety of conditions, since the results depend on field conditions (Maroufpoor et al, 2010;Jobbágy and Krištof, 2018;Berbe and Mateos, 2014). Traditionally, spray uniformity evaluation method according to Christiansen is the most frequently utilized (Li et al, 2015;Lovarelli et al, 2016) for assessment of performance quality of hose-reel irrigators. Due to the application of supplemental irrigation in fields with crops with higher need of irrigation, farmers must consider the irrigation rate, which also includes drainage losses.…”

Section: Resultsmentioning

confidence: 99%

Application and Evaluation of Performance Quality of Hose-Reel Irrigation Machine

Jobbágy

Michlian

Dačanin

et al. 2019

Acta Technologica Agriculturae

View full text Add to dashboard Cite

Considering the global tendency in water saving, this research is focused on practical measurements of even distribution of water. The performance quality is determined by values of coefficients of distribution uniformity and non-uniformity given in percentages. Objects of investigation were belt irrigators with varying input conditions (seven pieces). Testing of hose-reel irrigators took place in Southern and Western Slovakia. Tests were carried out during irrigation of selected agricultural crops (potatoes, vegetables); in these areas, rainwater vessels were distributed at a spacing of 1 or 2 m, perpendicular to the direction of movement of the bracket or tripod with a gun sprinkler. The input conditions, such as machine specifications and weather conditions, were monitored and evaluated for all variants. The data were also analysed along with the linear model through statistical analysis software – one-way analysis of variance ANOVA. Considering the results, it is possible to conclude that there were recorded statistically significant differences for uniformity coefficients, depending not only on the site but also on the specific evaluation methodology (P > 0.05). If the input conditions (site, type of irrigator, sprinkler) were changed, the effect of dependence was demonstrated to a much greater extent (P <0.05, F = 7.08> Fcrit). The results of the non-uniformity coefficients confirmed the statistically significant differences not only in the sample sets of coefficients but also in the selection sets of conditions.

show abstract

Development and validation of a modified model to simulate the sprinkler water distribution

Cited by 41 publications

References 19 publications

Predictive Models of Water Application and Distribution Efficiency in Conventional Sprinkling

Predictive Models of Water Application and Distribution Efficiency in Conventional Sprinkling

Effect of terrain slope on water distribution and application uniformity for sprinkler irrigation

Application and Evaluation of Performance Quality of Hose-Reel Irrigation Machine

Contact Info

Product

Resources

About