IRRIGATION UNIFORMITY OPTIMISATION OF A MINI-CENTRE PIVOT SYSTEM

Applying water efficiently is increasingly important for dairy farmers and other users of surface and groundwater resources to maintain sustainable production. However, irrigation is rarely monitored. We used a questionnaire survey and measurements of five spray irrigation systems working in normal farm conditions to make observations on how efficiently irrigation is being managed. Survey results from 93 dairy farmers showed that, although the farmers believe they know how much water is being applied during irrigation, only 60% make measurements, and about 18% measure irrigation uniformity. Catch-can measurement of irrigation application depth for the different spray systems indicated large variability in application depths during irrigation, and field distribution uniformity ranged greatly between the different systems, decreasing in the order of centre pivots >travelling irrigators> K-line. Changes in irrigation system settings were sometimes made without considering application depths or uniformity. If our five case studies are typical, they may explain the large range of seasonal irrigation amounts recorded in the survey. We recommend that farmers monitor irrigation application depths and uniformity to help manage irrigation water efficiently and to help them estimate the value of irrigation to their enterprise. Keywords: distribution uniformity, water use efficiency, catch cans

Download Full-text

Evaluation of the Quality of Irrigation Machinery by Monitoring Changes in the Coefficients of Uniformity and Non-Uniformity of Irrigation

Agronomy ◽

10.3390/agronomy11081499 ◽

2021 ◽

Vol 11 (8) ◽

pp. 1499

Author(s):

Ján Jobbágy ◽

Peter Dančanin ◽

Koloman Krištof ◽

Juraj Maga ◽

Vlastimil Slaný

Keyword(s):

Repeated Measurements ◽

Joint Stock Company ◽

Stock Company ◽

Uniformity Coefficient ◽

Quality Of Work ◽

Total Length ◽

Irrigation Uniformity ◽

Wide Range ◽

The Impact

Recently, the development of agricultural technology has been focused on achieving higher reliability and quality of work. The aim of the presented paper was to examine the possibilities of evaluating the quality of work of wide-area irrigation machinery by monitoring the coefficients of uniformity and non-uniformity of irrigation. The object of the research was pivot irrigation machinery equipped with sprinklers with a total length from 230 to 540 m. The commonly applied quality of work parameter for wide-range irrigators is the irrigation uniformity coefficient according to Heermann and Hein CUH. Work quality evaluations were also carried out through other parameters applicable in practice, such as irrigation uniformity coefficients calculated according to Christiansen CU, Wilcox and Swailes Cws, and our introduced parameters, the coefficient ar (derived from the degree of unevenness according to Oehler) and the degree of uniformity γr (derived from the degree of non-uniformity according to Voight). Other applied parameters for determining the quality of work of wide-range irrigation machinery were the coefficients of irrigation uniformity according to Hart and Reynolds CUhr, further according to Criddle CUcr and subsequently according to Beale and Howell CUbr. Next, the parameters of the non-uniformity coefficient according to Oehler a, the coefficient of variation according to Stefanelli Cv, the degree of non-uniformity according to Voigt γ and the degree of non-uniformity according to Hofmeister Ef were evaluated. Field tests were performed during the growing season of cultivated crops (potatoes, corn and sugar beet) in the village of Trakovice (agricultural enterprise SLOV-MART, southwest of the Slovakia) and in the district of Piešťany (Agrobiop, joint stock company). During the research, the inlet operating parameters (speed stage, inlet pressure, irrigation dose), technical parameters (number of sprayers, total length, number of chassis) and weather conditions (wind speed and temperature) were recorded. The obtained results were examined by one-way ANOVA analysis depending on the observed coefficient or input conditions and subsequently verified by Tukey and Duncan tests as needed. Irrigation uniformity values ranged from 67.58% (Cws) to 95.88% (CUbh) depending on the input conditions. Irrigation non-uniformity values ranged from 8.58 (a, Ef) to 32.42% (Cv). The results indicate a statistically significant effect of the site of interest and thus the impact of particular field conditions (p < 0.05). When evaluating the application of different coefficients of irrigation uniformity, the results showed a statistically significant effect only in the first test (p = 0.03, p < 0.05). During further repeated measurements, the quality of work increased due to the performed inspection of all sprayers and the reduction in the influence of the wind.

Download Full-text

Manufacturing Variation and Drip Irrigation Uniformity

Transactions of the ASAE ◽

10.13031/2013.34209 ◽

1981 ◽

Vol 24 (1) ◽

pp. 0113-0119 ◽

Cited By ~ 68

Author(s):

Vincent F. Bralts ◽

I-Pai Wu ◽

Harris M. Gitlin

Keyword(s):

Drip Irrigation ◽

Irrigation Uniformity ◽

Manufacturing Variation

Download Full-text

Assessing sprinkler irrigation uniformity using a ballistic simulation model

Agricultural Water Management ◽

10.1016/j.agwat.2006.01.006 ◽

2006 ◽

Vol 84 (1-2) ◽

pp. 89-100 ◽

Cited By ~ 55

Author(s):

E. Playán ◽

N. Zapata ◽

J.M. Faci ◽

D. Tolosa ◽

J.L. Lacueva ◽

...

Keyword(s):

Simulation Model ◽

Sprinkler Irrigation ◽

Irrigation Uniformity

Download Full-text

Analisisis Kinerja Sprinkler Mini Meganet 24 D Netafim Terhadap Variasi Debit dan Jarak Penempatan Sprinkler

Jurnal Sains Teknologi & Lingkungan ◽

10.29303/jstl.v0i0.253 ◽

2021 ◽

pp. 186-195

Author(s):

I Dewa Gede Jaya Negara ◽

Ida Bagus Giri Putra ◽

Anid Supriadi ◽

Made Anggitha Dewi

Keyword(s):

Data Analysis ◽

Flow Rate ◽

Sprinkler Irrigation ◽

Irrigation Performance ◽

Irrigation Uniformity

Currently, there are many efficient and effective sprinkler irrigation tools on the market, so it is necessary to be careful in choosing for irrigation. Among them, the Meganet 24D Netafim, including the type of irrigation tool, which still needs testing to know its performance. This study aims to examine the sprinkler irrigation performance of Meganet 24D Netafim, on variations in flow rate and distance between sprinklers, related to irrigation uniformity (CU) and irrigation radius (Rn). This test was carried out on an area of about 1 acre, at a flow rate of Q1=0.42/sec, Q2=0.51 l/sec, Q3=0.52/sec, Q4=0.56 and the test sprinkler distance, r1=2 ,5m, r2=3m,r3 = 3.5m and r4 = 4m. The results of data analysis are presented in the form of tables and graphs and concluded descriptively. The results showed that, in all variations of Q and sprinkler spacing r1, r2, r3 obtained irrigation uniformity (CU) above 85% which was classified as high, while in the r4, Q1 and Q2 tests, CU was obtained below 85% which was considered low. All discharge variations, showing irrigation radius (R) about 5 m. So at r4 sprinkler spacing, it is not recommended in irrigation applications.

Download Full-text

COMPOSIÇÃO DE PERFIS RADIAIS DE DISTRIBUIÇÃO DE ÁGUA DE ASPERSORES

Irriga ◽

10.15809/irriga.2009v14n1p41-53 ◽

2009 ◽

Vol 14 (1) ◽

pp. 41-53 ◽

Cited By ~ 4

Author(s):

Giuliani Do Prado ◽

Alberto Colombo

Keyword(s):

Key Words ◽

Flow Rate ◽

Linear Relation ◽

Water Distribution ◽

Test Bench ◽

Application Rate ◽

Water Application ◽

Irrigation Uniformity ◽

Nozzle Configuration ◽

Composition Process

COMPOSIÇÃO DE PERFIS RADIAIS DE DISTRIBUIÇÃO DE ÁGUA DE ASPERSORES Giuliani do Prado; Alberto ColomboDepartamento de Engenharia, Universidade Federal de Lavras, Lavras, MG, [email protected] 1 RESUMO Este trabalho descreve um procedimento de composição do perfil radial de aspersores que operam com dois bocais. Foram determinados na bancada de ensaios de aspersores da Universidade Federal de Lavras, em Lavras/MG, os valores de vazão e perfil radial do aspersor PLONA-RL250 operando, individualmente, com os bocais principais 14 e28 mme com os bocais auxiliares 5, 6 e7 mm, e operando, nas diferentes seis combinações de bocal auxiliar e principal do aspersor, sob cinco pressões de serviço (292, 392, 490, 588 e 696 kPa). No processo de composição do perfil radial realizado, ajustando a vazão dos bocais auxiliar e principal, operando individualmente, a vazão do aspersor operando com o conjunto de bocais auxiliar e principal, verificou-se um coeficiente de determinação médio de 88,57% entre as intensidades de precipitação adimensionais dos perfis radiais compostos com os perfis radiais do conjunto. Na relação linear, ajustada, entre os valores de uniformidade de equipamentos autopropelidos de irrigação, obtidos com os perfis radiais compostos e do conjunto, a inclinação da reta foi igual a 44°12’com um erro relativo médio de 2,34%. Estes resultados mostram que o procedimento de composição do perfil radial de aspersores não influencia, de maneira significativa, na uniformidade de aplicação de água de aspersores. UNITERMOS: bocais do aspersor, vazão do aspersor, uniformidade de irrigação. PRADO, G. DO; COLOMBO, A. SPRINKLER WATER DISTRIBUTION COMPOSITIONS 2 ABSTRACT This paper described a procedure to compose a sprinkler pattern for a sprinkler that operates with two nozzles. To compose the pattern, discharge values and patterns of the PLONA-RL250 sprinkler were determined at the sprinkler test bench of the Universidade Federal de Lavras, in Lavras/MG. The tests were conducted with all possible combinations using 14mm and28 mmmain nozzles and the 5, 6 and7 mmauxiliary nozzles as well as with each nozzle functioning individually. Five working pressures (294, 392, 490, 588 and 686 kPa) were used for each nozzle configuration. In the pattern composition process, by adjusting the main and auxiliary nozzle discharges operating individually, and by adjusting the sprinkler discharge operating with the corresponding pair of main and auxiliary nozzles, it was verified that the average determination coefficient was 88.57% between the dimensionless water application rate of the composed and pair patterns. In the adjusted linear relation, between the uniformity values of a travel irrigation machine obtained from the composed and pair patterns, the inclination was 44° 12' with an average relative error of 2.34%. These results show that the procedure to compose a sprinkler pattern for sprinklers does not influence significantly the water application uniformity of sprinklers. KEY WORDS: sprinkler nozzles, sprinkler flow rate, irrigation uniformity

Download Full-text

DIAGNÓSTICO DA APLICAÇÃO DE ÁGUAS RESIDUÁRIAS DA SUINOCULTURA NA CAFEICULTURA IRRIGADA II. AVALIAÇÃO DA UNIFORMIDADE DE APLICAÇÃO DE ÁGUA

Irriga ◽

10.15809/irriga.2006v11n3p402-414 ◽

2006 ◽

Vol 11 (3) ◽

pp. 402-141

Author(s):

Roberta Alessandra Bruschi Gonçalves ◽

Everardo Chartuni Mantovani ◽

Márcio Mota Ramos ◽

Luiz Otávio Carvalho de Souza

Keyword(s):

Irrigation System ◽

Crop Productivity ◽

Distribution Coefficients ◽

Minas Gerais ◽

Water Application ◽

Coffee Plantations ◽

Uniformity Coefficient ◽

Filtration System ◽

Irrigation Uniformity ◽

Minas Gerais State

DIAGNÓSTICO DA APLICAÇÃO DE ÁGUAS RESIDUÁRIAS DA SUINOCULTURA NA CAFEICULTURA IRRIGADAII. AVALIAÇÃO DA UNIFORMIDADE DE APLICAÇÃO DE ÁGUA Roberta Alessandra Bruschi Gonçalves; Everardo Chartuni Mantovani; Márcio Mota Ramos; Luiz Otávio Carvalho de SouzaDepartamento de Engenharia Agrícola, Universidade Federal de Viçosa , Viçosa-MG, [email protected] 1 RESUMO A uniformidade de aplicação de água influencia diretamente a produtividade das culturas, que tende a aumentar com a uniformidade de irrigação. O objetivo deste trabalho foi determinar os coeficientes de uniformidade de distribuição de água residuária da suinocultura (ARS) em 6 propriedades cafeeiras, que aplicam ARS via sistema de irrigação, localizadas em 5 diferentes municípios da região de cerrado de Minas Gerais. Do total de sistemas avaliados, 50% apresentaram coeficientes de uniformidade de distribuição de água residuária (CUC/CUD) abaixo do recomendado. Os melhores resultados estão associados ao sistema de irrigação localizada por gotejamento, mostrando a viabilidade da utilização do mesmo, desde que haja manejo adequado ao longo de todo o processo de tratamento do efluente, inclusive no sistema de filtragem do equipamento. UNITERMOS: café, reuso, irrigação GONÇALVES, R. A. B.; MANTOVANI, E. C.; RAMOS, M. M.; SOUZA, L. O. C. de; ANALYSIS OF SWINE CULTURE WASTEWATER APPLICATION ON IRRIGATED COFFEE CROP - II. EVALUATION OF WATER APPLICATION UNIFORMITY 2 ABSTRACT Water application uniformity influences crop productivity that is likely to increase with irrigation uniformity. The objective of this work was to determine the uniformity distribution coefficients of swine culture wastewater on coffee plantations (SCW); the analysis was carried out on 6 farms in the Minas Gerais State cerrado region that use SCW through their irrigation system. Half of the assessed systems presented water application uniformity coefficient below the recommended limit. The best results were associated to drop irrigation, showing the viability of this irrigation system use if there is an appropriate management throughout the entire treatment process, including equipment filtration system management. KEYWORDS: coffee, irrigation, reuse

Download Full-text

Evaluation of the coefficient of uniformity and non-uniformity of irrigation for wide-range irrigators in various field conditions

Research in Agricultural Engineering ◽

10.17221/8/2017-rae ◽

2018 ◽

Vol 64 (No. 2) ◽

pp. 55-62

Author(s):

Jobbágy Ján ◽

Krištof Koloman

Keyword(s):

Linear Model ◽

Evaluation Methods ◽

Field Conditions ◽

Work Quality ◽

Specific Field ◽

Irrigation Uniformity ◽

Wide Range ◽

Coefficient Of Uniformity ◽

Input Variables

The aim of this paper is to address an issue of work quality of irrigation machines with eight parameters that were selected and defined as input variables. The objective of the study was to determine possibilities of different evaluation methods for a wide range of irrigation machines and their versatility. All input conditions that could affect the results were recorded and analysed. The results were statistically analysed by a linear model (ANOVA). The results confirm that there are no statistically significant differences in used evaluation methods (p > 0.05) when the effect of locality was not considered. When the effect of locality was considered, statistically significant differences were observed (p < 0.05). When considering the coefficient of non-uniformity, statistically significant differences were not observed, however in case of considering different irrigation machines, statistically significant differences were observed. The obtained results indicate that the evaluation of irrigation uniformity is possible to carry out with other methods; however, the specific field conditions are not interchangeable as a parameter.

Download Full-text

Effect of Combination Factors of Operating Pressure, Nozzle Diameter and Riser Height on Sprinkler Irrigation Uniformity

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.695.380 ◽

2014 ◽

Vol 695 ◽

pp. 380-383 ◽

Cited By ~ 2

Author(s):

Manal Osman ◽

Suhaimi B. Hassan ◽

Khamaruzaman B. Wan Yusof

Keyword(s):

Irrigation System ◽

Sprinkler Irrigation ◽

Nozzle Diameter ◽

Operating Pressure ◽

Irrigation Uniformity ◽

Distribution Uniformity ◽

Coefficient Of Uniformity ◽

Riser Height ◽

Design Factors ◽

Pressure Nozzle

The irrigation uniformity of sprinkler irrigation system depends on many design factors such as nozzle type, nozzle diameter, operating pressure and riser height. An experimental study was performed to investigate the effect of combination factors of operating pressure, nozzle diameter and riser height on sprinkler irrigation uniformity. Different operating pressures, nozzle diameters and riser heights have been used. The irrigation uniformity coefficients such as coefficient of uniformity (CU) and distribution uniformity of low quarter (DUlq) have been studied. This study concluded that, the irrigation uniformity of sprinkler irrigation system was more affected by the combination of operating pressure, nozzle diameter and riser height.

Download Full-text