Pressure Distribution on a Center-Pivot Sprinkler Irrigation System

1970 ◽  
Vol 13 (5) ◽  
pp. 0556-0558 ◽  
Author(s):  
D. C. Kincaid and D. F. Heermann
Irriga ◽  
2019 ◽  
Vol 1 (1) ◽  
pp. 8-17
Author(s):  
Victor Buono da Silva Baptista ◽  
Alberto Colombo ◽  
Thiago Henrique Burgarelli Teixeira ◽  
Pietros André Balbino dos Santos ◽  
Adriano Valentim Diotto ◽  
...  

INFLUÊNCIA DO CANHÃO FINAL NA DISTRIBUIÇÃO DE PRESSÃO E VAZÃO DA LINHA LATERAL DE UM PIVÔ CENTRAL     VICTOR BUONO DA SILVA BAPTISTA1; ALBERTO COLOMBO2; THIAGO HENRIQUE BURGARELLI TEIXEIRA3; PIETROS ANDRÉ BALBINO SANTOS4; ADRIANO VALENTIM DIOTTO5 E LESSANDRO COLL FARIA6   1  Professor Assistente, Departamento de Engenharia, Universidade Federal de Lavras, Campus Universitario, s/n, Caixa Postal 3034, CEP 37200-000, Lavras, MG, Brasil. Email: [email protected] 2  Professor Titular, Departamento de Recursos Hídricos e Saneamento, Universidade Federal de Lavras, Campus Universitario, s/n, Caixa Postal 3034, CEP 37200-000, Lavras, MG, Brasil. Email: [email protected] 3  Doutorando, Programa de Pós-graduação em Recursos Hídricos, Universidade Federal de Lavras, Campus Universitario, s/n, Caixa Postal 3034, CEP 37200-000, Lavras, MG, Brasil. Email:  [email protected] 4  Doutorando, Programa de Pós-graduação em Recursos Hídricos, Universidade Federal de Lavras, Campus Universitario, s/n, Caixa Postal 3034, CEP 37200-000, Lavras, MG, Brasil. Email: [email protected] 5  Professor Adjunto, Departamento de Recursos Hídricos e Saneamento, Universidade Federal de Lavras, Campus Universitario, s/n, Caixa Postal 3034, CEP 37200-000, Lavras, MG, Brasil. Email: [email protected] 6  Professor Associado, Centro de Desenvolvimento Tecnológico, Universidade Federal de Pelotas, Rua Gomes Carneiro, Centro, CEP 96010-610, Pelotas, RS, Brasil. Email: [email protected]     1 RESUMO   O objetivo deste trabalho foi analisar a influência da presença do canhão final, com diferentes vazões, na distribuição de pressão e vazão da linha lateral de um sistema de irrigação do tipo pivô central utilizando o simulador hidráulico EPANET em comparação com um modelo analítico. Foram realizadas simulações de uma linha lateral do pivô central, localizado em Lavras/MG, com a inserção de um canhão final fictício de altas vazões. Houve também a diminuição do diâmetro da linha lateral, visando provocar maior perda de carga. Os resultados obtidos pelo EPANET foram comparados com resultados determinados a partir de um método analítico. Dessa forma, este estudo demonstrou a influência do acréscimo de vazão na distribuição de pressão da linha lateral do pivô central, devido à presença do canhão final. Os resultados também demonstraram a qualidade da simulação hidráulica do EPANET, que apresentou desvio relativo máximo de 1% em relação ao método analítico.   Keywords: simulação hidráulica, distribuição de pressão, EPANET, modelagem.     BAPTISTA, V. B. S.; COLOMBO, A.; TEIXEIRA, T. H. B.; SANTOS, P. A. B.; DIOTTO, A. V.; FARIA, L. C. INFLUENCE OF END GUN IN THE PRESSURE AND FLOW RATE DISTRIBUTION OF A CENTER PIVOT LATERAL LINES     2 ABSTRACT   The aim of this work was to analyze the influence of the presence of the end gun, with different flow rates, on the pressure distribution and lateral line flow of a center pivot irrigation system using the EPANET hydraulic simulator compared to an analytical model. Simulations were performed on center pivot lateral line located in Lavras/MG. In the simulations was inserted an end gun operating under high flow. There was also decrease lateral line diameter aiming to cause greater head loss. The results obtained were compared with the use of EPANET parameters and with an analytical method. Thus, this study showed the influence from flow increase in the pressure distribution of the pivot lateral line, since there was an end gun in the end of the lateral. The results also demonstrated a satisfied estimative of EPANET's hydraulic theory.   Keywords: hydraulic simulation, pressure distribution, EPANET, modeling.


Author(s):  
Kasa MekonenTiku ◽  
Pratap Singh

The study was carried out to study on identification of performance gaps for improvement of center pivot sprinkler system in the Tigray region of Northwest Ethiopia. The objective of the study was to identify center pivot sprinkler irrigation system gaps and suggest remedial measures for improvement of the center pivot sprinkler irrigation system. The methods used for gap Identification were observation, Interview, measurement, and using design document. Center pivot sprinkler gaps identification study revealed that Excess runoff due to leaky boots and higher application depth, absence of regular checkup for emitting devices, and improper scheduling were dominant gaps and Making functional an Automatic control system, regular checkup and maintenance of emitting accessories and proper scheduling could minimize the identified problems and finally the irrigation efficiency would be amended.


Author(s):  
Kasa Mekonen Tiku ◽  
Pratap Singh

Irrigation practice evaluation of center pivot sprinkler irrigation system at Hiwot Agricultural Mechanization farm, North/west Ethiopia was conducted. The aim of the study was evaluating the existing center pivot irrigation practice in terms of irrigation scheduling. Measuring flow rate of center pivot machines for existing irrigation practice and Crop water requirement based scheduling was used to evaluate the system. The highest value of crop water requirement at location m6, m7 and m12 was 5.24 mm/day in September at mid-stage and for location m4 and m8 in October at mid-stage equal to 4.99 mm/day. Whereas, the lowest crop water requirement at location m6, m7 and m12 was 2.52 mm/day in July at the initial stage which was and for location m4 and m8 in august at initial stage equal to 2.08 mm/day. The actual flow rate of center pivot machines varies from 0.7l/s for m7 to a maximum of 1l/s for m4 whereas estimated crop water requirement flow rate varies from 0.6l/s for m6 to a maximum of 0.8l/s for m4. The study also revealed that the actual flow rate of the nozzles was excess. Therefore improvement of center pivot sprinkler irrigation system can be amended by using proper irrigation scheduling and by introducing an automatic control system.


Irriga ◽  
2009 ◽  
Vol 14 (4) ◽  
pp. 481-491
Author(s):  
José Dantas Neto ◽  
Jonas Carlos Santino Silva ◽  
Maria Salludeladia Sobral de Farias ◽  
Carlos Henrique de Azevedo de Farias ◽  
Carlos Alberto Vieira de Azevedo

DESEMPENHO DO SISTEMA DE IRRIGAÇÃO POR ASPERSÃO, TIPO PIVÔ CENTRAL REBOCÁVEL.  José Dantas Neto; Jonas Carlos Santino Silva; Maria Sallydelâdia Sobral de Farias; Carlos Henrique de Azevedo de Farias; Carlos Alberto Vieira de Azevedo.Departamento de Engenharia Agrícola, Universidade Federal de Campina Grande, Campina Grande, PB, [email protected]  1 RESUMO O objetivo deste trabalho foi avaliar a performance de um pivô central rebocável em nível de campo, na Fazenda Capim, localizada no município de Capim-PB. Os resultados da avaliação do equipamento nas três bases estudada levaram a concluir que: o equipamento apresentou bons resultados quando analisado como um todo para as base, constatou-se problemas de uniformidade e de eficiência em alguns setores quando a análise foi feita por raio individualmente, indicando setores com déficit e outros com excesso de água, o equipamento apresentou seus piores resultados quando foi avaliado na base 5, verificou-se que existe uma dispersão das lâminas de água aplicadas em relação ao valor médio, em todas as bases estudadas, as pressões de entrada do pivô nas bases, 4 e 5 estão muito abaixo da pressão recomendada o que resultou numa baixa vazão nestas bases. UNITERMOS: irrigação, manejo, variabilidade. DANTAS NETO, J.; SILVA, J. C. S.; FARIAS, M. S. S. de; FARIAS, C. HENRIQUE de A. de; AZEVEDO, C. A. V. de. PERFORMANCE OF TOWABLE CENTER PIVOT TYPE SPRINKLER IRRIGATION SYSTEM  2 ABSTRACT The objective of this work was to evaluate the performance of a towable pivot center in the field on Fazenda Capim in the municipal district of Capim-PB. The results of the equipment evaluation of the three studied bases showed that the equipment presented good results when analyzed as a whole for them. Uniformity and efficiency problems in some sections were analyzed when the analysis was individually made by ratio, indicating sections with deficit and other with excess of water. The equipment presented their worst results when it was evaluated in base 5. It was verified a dispersion of the applied water sheets in relation to the mean value, in all studied bases. The pressures on pivot in bases 4 and 5 are a lot below the recommended pressure and resulted in low flow in these bases.  KEYWORDS: irrigation, management, variability 


Author(s):  
Amin Seyedzadeh ◽  
Amir Panahi ◽  
Eisa Maroufpoor ◽  
Abdolmajid Liaghat

2018 ◽  
Vol 31 (2) ◽  
pp. 370-378
Author(s):  
JÚLIO JUSTINO DE ARAÚJO ◽  
VANDER MENDONÇA ◽  
MARIA FRANCISCA SOARES PEREIRA ◽  
MATHEUS DE FREITAS SOUZA

ABSTRACT The banana tree is grown in an extensive tropical region throughout the world, usually by small producers. The present work had the objective of evaluating irrigation systems in banana production in the Açu-RN Valley, aiming at alternatives so that they can be recommended to farmers in the Açu Valley region. The experiment was carried out in the area of the School Farm of the IFRN Campus Ipanguaçu, located in the municipality of Ipanguaçu-RN. The experiment was carried out in a randomized complete block design with subdivided plots and eight replications. The irrigation systems were: irrigation, drip irrigation, micro sprinkler and alternative irrigation. The plots were composed of eight useful plants with spacing in double rows 4 x 2 x 2 m. Eight characteristics related to production were evaluated: bunch mass (MC); number of leaves (NP); number of fruits per cluster (NFC); mean mass of the leaves (MMP); diameter of the fruit of the second seed (DF2P); length of the fruit of the second seed (CF2P); mean fruit mass (MMF); productivity (Prod). The data were submitted to analysis of variance and the means were compared by the Tukey test at 5% of probability. In the first cycle of production the sprinkler irrigation system was the one that presented better results the productivity of the Pacovan banana tree; in the 3rd cycle the alternative irrigation system was the one that showed better results the productivity of the banana tree; where the electrical conductivity correlated with the sodium adsorption ratio in the irrigation water, contributed to a moderate limitation of use.


2018 ◽  
Vol 48 (2) ◽  
pp. 153-162 ◽  
Author(s):  
Orivaldo Arf ◽  
José Roberto Portugal ◽  
Salatiér Buzetti ◽  
Ricardo Antônio Ferreira Rodrigues ◽  
Marco Eustáquio de Sá

ABSTRACT The Brazilian Savannah region presents a great potential for the expansion of upland rice crops. However, studies are necessary to identify practices that can improve the crop performance, especially in no-tillage systems. This study aimed to assess the effect of cover crops in association with corn on the development and yield of rice cultivated in rotation and cover fertilized with nitrogen doses. The sprinkler irrigation system was used and the experiment was developed in the 2014/2015 and 2016/2017 harvest years, using a randomized block design, in a 5 × 4 factorial scheme. The treatments consisted of the crop remains combinations of single corn crop, corn + Crotalaria spectabilis, corn + pigeon pea, corn + jack bean and corn + Urochloa ruziziensis, as well as cover nitrogen doses (0 kg ha-1, 40 kg ha-1, 80 kg ha-1 and 120 kg ha-1) in the rice. The cultivation of upland rice in rotation with corn + pigeon pea was favored by the greater soil cover and nitrogen supply via cycling, if compared to the rotation with single corn crop. The intercropped corn + pigeon pea cultivation in the previous summer resulted in a 15 % increase in the yield of rice grains seeded in the rotation, when compared to the single corn crop. The cover nitrogen application positively influenced the grain yield with the maximum estimated doses of 46 kg ha-1 and 105 kg ha-1 of nitrogen, respectively in the 2014/2015 and 2016/2017 harvest years.


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