Hydraulic performance evaluation of mini sprinkler system

Dwivedi, D.; Gontia, Narendra Kumar; Chavda, Jaypalsinh Mahobatsinh

doi:10.5897/ajar2015.10422

Afr. J. Agric. Res.

2015

DOI: 10.5897/ajar2015.10422

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Hydraulic performance evaluation of mini sprinkler system

D. Dwivedi¹,

Narendra Kumar Gontia²,

Jaypalsinh Mahobatsinh Chavda³

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Cited by 3 publications

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Effect of some design parameters on the performance of side access nozzle and grooved plate of centre pivot sprinkler

JM,

AS,

et al. 2024

IJH

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This research evaluates the effect of various heights, pressures, nozzle size and groove numbers on the uniformity distribution of a developed pivot sprinkler. The experiment was set up at an open space in Niger State College of Agriculture Mokwa. The wind speed and temperature during the experiment were at an average of 2.2mph and 25°C. A nozzle of size 6mm, and deflection plate of 6 curved grooves were used in a centre pivot spray unit. In evaluating the performance of the spray unit components i.e. the nozzle and deflection plate, three different pressures of 5, 10, and 15 Psi and heights of 1, 1.2, and 1.5mm were used. The support structure for the experiment is an inverted U-shaped frame designed to support a spray sprinkler at different heights. The water source was a reservoir with a capacity of 3m3and a 1.5hp electric centrifugal pump was used. The volumetric or bucket method was used to measure flow rate. The application rate was measured using catch can method. The duration of each test was approximately 30min. The data obtained from the measurements were statistically analyzed with line graphs using Excel. Relationships were also established between discharge and pressure. The highest index of jet break up was 4.89 at 15Psi and 3.74 at 10Psi. The result shows that as the pressure increases with height the CU also increases. The highest uniformity of 79.4% was obtained at 1.5m height and 15Psi.

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Effect of some design parameters on the performance of side access nozzle and grooved plate of centre pivot sprinkler

JM,

AS,

et al. 2024

IJH

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Condition and Performance Assessment of Irrigation Infrastructure at Agri-Parks in Gauteng Province, South Africa

2023

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South African agriculture accounts for 62% of the national water demand. Almost 45% of the water is wasted. Therefore, irrigation systems need to improve their water-use efficiency (WUE). However, the WUE of smallholder irrigation schemes in the country, including Agri-Parks, is not precisely known. A study was performed at four Agri-Parks (Rooiwal, Soshanguve, Tarlton, and Westonaria) in Gauteng province to assess the condition and performance of the irrigation systems, as part of a project that aimed to develop a WUE model for smallholder irrigation systems. The Agri-Parks were equipped with efficient irrigation systems in forms of drip and microjets. The assessments were performed at the system component level in February–March 2021. A Condition Assessment Model (CAM), developed by ARC-NRE/AE, was used for the condition assessment. Enumerators observed the system components visually and assigned conditions, which they uploaded into the model to generate condition indices (CIs). Water conveyance efficiency (CE) and distribution uniformity (DU) were assessed on delivery and infield systems, respectively. The CI values ranged 4–6, implying significant deterioration had occurred. The CE was 61–78%, while the DU was 60–95%. The infield system CI correlated positively with the DU, suggesting the CI could predict the DU in drip systems, which was encouraging for the proposed WUE model. However, further research covering a longer period and more Agri-Parks is recommended.

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Competitive strategies applied to agribusiness in South-Eastern Paran, Brazil

Senff¹,

Bendlin²,

Lucimara³

et al. 2016

Afr. J. Agric. Res.

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Agriculture plays a key role in the economy and quality of life. How to best employ available resources in order to improve productivity, profitability and sustainability of these processes has been the subject of many studies. This study aims to analyse by multi-index methodology the expected return and risks associated with investment in agribusiness, particularly on what concerns the implantation viability of a vegetable-washing machine. It thus listed the production and maintenance costs of carrot and cucumber cultures, as well as cleaning costs and the profitability and inherent risks of the implementation. Having in mind that this research requires empirical and analytical evidences as well as a case study, a company located in South-eastern Brazil was chosen by means of an applied research. Data from a Minimum Acceptable Rate of Return (MARR) of 6% per year was collected by documental research and semi-structured interviews systematized in a cash flow projected within the respective deadlines. Results indicate an Additional Return Over the Investment (AROI, 16.06%) higher than the MARR for carrots and 14.94% higher for cucumbers. These results show that when a competitive strategy of vegetable cleaning through a machine is employed, with expectation for return in 24 months, the impacts are positive, signalling high profitability and compatible risks with the expected return, reinforcing the soundness of such an investment in agribusiness.

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Hydraulic performance evaluation of mini sprinkler system

Cited by 3 publications

References 2 publications

Effect of some design parameters on the performance of side access nozzle and grooved plate of centre pivot sprinkler

Effect of some design parameters on the performance of side access nozzle and grooved plate of centre pivot sprinkler

Condition and Performance Assessment of Irrigation Infrastructure at Agri-Parks in Gauteng Province, South Africa

Competitive strategies applied to agribusiness in South-Eastern Paran, Brazil

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