Pressure Distribution on Center Pivot Lateral Lines: Analytical Models Compared to EPANET 2.0

Baptista, Victor Buono Silva; Colombo, Alberto; Barbosa, Brenon Diennevan Souza; Alvarenga, Lívia Alves; Diotto, Adriano Valentim

doi:10.1061/(asce)ir.1943-4774.0001488

Cited by 3 publications

(2 citation statements)

References 17 publications

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“…Detecting errors before they happen is hard due to checking every part (gearbox, gearmotor, tires, and more) of each device, leaving only aftereffects. Moreover, fixing damage after malfunction or crashes can be costly, potentially leading to overspend or unplanned costs (Ouazaa et al, 2015;Buono et al, 2020).…”

Section: Center Pivot Irrigation System Maintenancementioning

confidence: 99%

Intelligent Control System for Monitoring the Maintenance of the Center Pivot Irrigation System

Ismail,

Zin El-Abedin,

Shawky

et al. 2024

Misr Journal of Agricultural Engineering

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The national Egypt strategy for sustainable agricultural development (SADS-2030),focuses on increasing agricultural area by approximately 1.5 million feddan to address the food gap. The central pivot irrigation system is one of the most effective ways to achieve this goal. Maintaining a center pivot device is hard. Moreover, repairing the damage that happens after the malfunction of the device will be timeconsuming and costly. So, the main goal of this study was to monitor, detect early error and warn the operator before starting any irrigation process, which prevents a malfunction or crash of the center pivot. The developed monitoring systems use NTC thermistors and an oil level sensor to monitor oil temperature and leaks in the gear box and motor. Tire pressure monitoring sensor (TPMS) was used to monitor towers' tires pressure. These sensors were installed in a unit known as "Tower/central node board" which consists of two ESP32 microcontrollers installed inside the main control panel. The main control panel of the device collects all the vital readings from all towers and communicates them with the cloud server using the internet, which allows the remote control of the device. Field tests were performed by using a "Valley" center Pivot System at the Egyptian Ismailia governorate's conditions, for detecting the sensitivity and accuracy of the system. Data was collected from two towers of the center pivot system and analyzed in a simple digital model that was used to process and decide on possible maintenance instructions.

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Section: Center Pivot Irrigation System Maintenancementioning

confidence: 99%

Intelligent Control System for Monitoring the Maintenance of the Center Pivot Irrigation System

Ismail,

Zin El-Abedin,

Shawky

et al. 2024

Misr Journal of Agricultural Engineering

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“…The CPIS design procedure suggested by Baiamonte et al [26] for one-diameter lateral could be extended for three or more sectors, but for a simplified description of the procedure, only two sectors will be considered here. Under constant q n , for sector I and for sector II, i.e., for the outer lateral and for the inner laterals (Figures 5 and 6), the PHD line can be expressed as: 1.852 s * i,I I for j > N I , (9) respectively, where h *j is the pressure head at the sprinkler j; h *min is the minimum pressure head to be imposed at the first sprinkler j = 1, both normalized with respect to r 0 , h j /r 0 and h min /r 0 , respectively; and K I and K II denote the parameters of sector I and of sector II, accounting for the friction losses (friction head loss gradient) and according to the well-accepted Hazen-Williams's resistance equation [5,32], also recently considered for CPIS [33]:…”

Section: Hydraulic Designmentioning

confidence: 99%

Dual-Diameter Laterals in Center-Pivot Irrigation System

Baiamonte

2022

Water

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Design strategies to enhance modern irrigation practices, reduce energy consumption, and improve water use efficiency and crop yields are fundamental for sustainability. Concerning Center-Pivot Irrigation Systems, different design procedures aimed at optimizing water use efficiency have been proposed. Recently, following a gradually decreasing sprinkler spacing along the pivot lateral with constant diameter and sprinkler flow rate, a new design method providing a uniform water application rate has been introduced. However, no suggestions were given to design multiple-diameter laterals characterized by different values of the inside pipe diameter. In this paper, first the previous design procedure is briefly summarized. Then, for the dual-diameter center pivot laterals a design procedure is presented, which makes it possible to determine pipe diameters that always provide sprinkler pressure heads within an admitted range. The results showed that for the assigned input parameters, many suitable solutions can be selected. The lateral pressure head distributions were compared to those derived by the common numerical step by step solutions, validating the suggested simplified procedure. An error analysis was performed, showing that the relative error, in pressure heads, RE, was less than 2.3%. If imposing the mean weight diameter, Dm, equal to its minimum value, the optimal pressure head tolerance of the outer lateral, δI, amounting to about 2%, with the RE in pressure heads being less than 0.4%, which makes the suggested procedure very accurate. Several applications were performed, compared, and discussed.

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Geostatistical Approach to Determining the Pressure Head Spatial Distribution along the Center-Pivot Lateral Line

Barbosa,

Ferraz,

Colombo

et al. 2024

J. Irrig. Drain Eng.

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Pressure Distribution on Center Pivot Lateral Lines: Analytical Models Compared to EPANET 2.0

Cited by 3 publications

References 17 publications

Intelligent Control System for Monitoring the Maintenance of the Center Pivot Irrigation System

Intelligent Control System for Monitoring the Maintenance of the Center Pivot Irrigation System

Dual-Diameter Laterals in Center-Pivot Irrigation System

Geostatistical Approach to Determining the Pressure Head Spatial Distribution along the Center-Pivot Lateral Line

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