Predictive Models of Water Application and Distribution Efficiency in Conventional Sprinkling

Araújo, Edcássio Dias; Santos, Dionei Lima; Alvino, Francisco Cássio Gomes; Ferreira, Lucas Borges; Cunha, Fernando França da

doi:10.1590/1809-4430-eng.agric.v40n1p24-33/2020

Cited by 7 publications

(10 citation statements)

References 24 publications

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“…Thus, the results indicate that the hose/shower system should not be recommended for irrigation of clay tennis courts, considering the uniformity of distribution and the saving of water and electricity. However, other studies should be conducted, since the results found here are only for the application of water on the tennis court’s surface, and it is believed that after water is applied to this surface, it is redistributed in the first layers of clay, as suggested by Araújo et al [ 9 ] and Rocha et al [ 27 ].…”

Section: Resultsmentioning

confidence: 75%

“…Evaporation losses are also higher in systems that apply water with smaller drop diameter, which in turn is a function of the emitter characteristics and operating pressure. Drift losses depend mainly on wind speed, drop diameter and distance traveled by water until reaching the target to be irrigated [ 9 , 10 , 26 ]. Thus, it can be noted in the hose/shower irrigation system that, in addition to the higher values of operating pressure and wind speed, another characteristic that contributed to the greatest losses was the fact that water was applied from a distance.…”

Section: Resultsmentioning

confidence: 99%

“…To choose or replace an irrigation system with a more efficient one, evaluations must be carried out [ 9 ]. It is worth mentioning that the performance of irrigation systems should be quantified in the initial phase of planning and management and, in the field, as an operational criterion.…”

Section: Introductionmentioning

confidence: 99%

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Proposition of irrigation system for wetting the clay surface of tennis courts

et al. 2022

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The key to maintaining a clay court with quality and lastingly is through water applications, carried out periodically and through systems with high distribution uniformity, developed specifically for this purpose. The objective in this study was to evaluate the performance of a sprinkler irrigation system with hose and shower, traditionally used in clay tennis court, and propose another low-cost system that is operational and technically feasible, which is the irrigating bar. For each irrigation system, three evaluations were performed. At the beginning of each test, the pressures and flow rates of the emitters were measured, and the water distribution profile method was used to determine the distribution uniformity of the systems. Distribution efficiency was obtained through the Christiansen’s (UC), distribution (UD), absolute (UA), statistical (US) and Hart’s (UH) uniformity coefficients, HSPA standard efficiency (UHSPA) and, coefficient of variation (CV). Subsequently, the application and irrigation efficiencies were calculated. It was found that the irrigation bar required lower operating pressure, as well as greater stability of pressure and flow in relation to the hose system. Water losses in the hose/shower system (22.0%) were higher than in the irrigation bar (0.6%). Regardless of the evaluated system, UC (68.4% and 86.5%) and UH (66.4% and 87.5%) values were similar and higher than those of the other coefficients (~51.8% and ~81.2%). The collected depths, applied by the hose/shower irrigation system, showed high spatial variability and, consequently, low values of uniformity, being classified as poor or unacceptable. The irrigating bar promoted higher values of uniformity coefficients, being classified as good. Irrigation efficiencies were 53.97 and 85.97% for hose/shower and irrigation bar systems, respectively. The hose/shower system has low performance in the irrigation of clay tennis courts. The irrigation bar system, for providing technical, operational, and economic benefits, and has the potential to be used in the irrigation of clay tennis courts.

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Section: Resultsmentioning

confidence: 75%

Section: Resultsmentioning

confidence: 99%

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Proposition of irrigation system for wetting the clay surface of tennis courts

et al. 2022

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“…The irrigation system consisted of four polyethylene drip tapes (5 m long and 17 mm diameter), spaced 0.3 m from each other, totaling 17 drippers per tape (Figure 2). The four lines were subjected to a uniformity test to determine the Christiansen uniformity coefficient (CUC), distribution uniformity coefficient (DUC), and statistical uniformity coefficient (SUC) to evaluate the hydraulic characteristics of the system, as suggested by Frizzone et al (2012) and Araújo et al (2020). The system was pressurized by gravity at a pressure of 4.4 mH2O, provided by the water supply system of ESALQ.…”

Section: Irrigation Management and Uniformitymentioning

confidence: 99%

Development of a Low-Cost Open-Source Platform Connected to the Internet for Acquisition of Environmental Parameters and Soil Moisture

Pinto¹,

Camargo²,

Duarte³

2021

Eng. Agríc.

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The development of the Internet and the technologies associated with it has allowed disseminating and cheapening of communication equipment, prototyping services, electronic sensors, and all types of devices. Agriculture has benefited from these technological advances to boost its productivity and profitability. This study presents the development of a data acquisition and device control platform to obtain, in real-time and remotely, information from the field for decision-making and process automation. All electronic components are low-cost and "open hardware", and the software is "opensource". The developed platform was validated during a development cycle of two lettuce varieties (Japanese and crisp), in which the soil water matric potential was monitored at two depths (10 and 25 cm), while solar irradiation, air temperature, and soil temperature were evaluated only to monitor the cycle. The platform automatically and satisfactorily controlled the applied irrigation depths using only the data of matric potential by activating a solenoid valve and made the information from the sensors available on the ThingSpeak Internet of Things (IoT) platform.

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“…The efficiency of any irrigation system related to the uniformity of water distribution and affected by any change that occurs to it [10]. In addition, managing the irrigation system requires finding efficient irrigation and distribution [11].…”

Section: Introductionmentioning

confidence: 99%

Efficiency, Adequacy, and Uniformity for Normal Distribution of the Application Depths

Yasin¹,

Ghazal²

2021

(AREJ)

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The research aims to find a set of figures in case of the normal distribution of application depths that represent relationships for the parameters used to describe the performance characteristics of the irrigation system. Using 6010 values for each of the dimensionless application depth, dimensionless cumulative area, and the coefficient of variation, with the help of the SPSS statistical program, an empirical equation was obtained to estimate the dimensionless application depth as a function of the dimensionless cumulative area and the coefficient of variation. Five figures were developed containing the relationships between dimensionless net depth of irrigation, application uniformity, coefficient of variation or uniformity coefficient, application efficiency or deep percolation losses, and storage efficiency or deficit coefficient. By knowing two of these parameters, the rest of them can be easily found from these figures.

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Predictive Models of Water Application and Distribution Efficiency in Conventional Sprinkling

Cited by 7 publications

References 24 publications

Proposition of irrigation system for wetting the clay surface of tennis courts

Proposition of irrigation system for wetting the clay surface of tennis courts

Development of a Low-Cost Open-Source Platform Connected to the Internet for Acquisition of Environmental Parameters and Soil Moisture

Efficiency, Adequacy, and Uniformity for Normal Distribution of the Application Depths

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