scholarly journals PRESSÕES DE SERVIÇOS E SEUS EFEITOS NO DESEMPENHO DE UM SISTEMA DE IRRIGAÇÃO POR GOTEJAMENTO

Irriga ◽  
2018 ◽  
Vol 1 (2) ◽  
pp. 14-18
Author(s):  
Taiane de Almeida Pereira ◽  
Alexandre Reuber Almeida da Silva ◽  
Marcos Makeison Moreira de Sousa ◽  
Cristian De França Santos ◽  
Daniel Lima dos Santos
Keyword(s):  
Drip Irrigation ◽  
Water Distribution ◽  
Irrigation System ◽  
Drip Irrigation System ◽  
Mean Values ◽  
Uniformity Coefficient ◽  
Lateral Lines ◽  
Distribution Uniformity ◽  
Water Volumes ◽  
Micro Irrigation

PRESSÕES DE SERVIÇOS E SEUS EFEITOS NO DESEMPENHO DE UM SISTEMA DE IRRIGAÇÃO POR GOTEJAMENTO     TAIANE DE ALMEIDA PEREIRA1; ALEXANDRE REUBER ALMEIDA DA SILVA2; MARCOS MAKEISON MOREIRA DE SOUSA3; CRISTIAN DE FRANÇA SANTOS1 E DANIEL LIMA DOS SANTOS1   1Graduandos em Tecnologia em Irrigação e Drenagem, Instituto Federal de Educação Ciência e Tecnologia do Ceará – campus Iguatu, Rodovia Iguatu/Várzea Alegre, Km 05 – Vila Cajazeiras – Iguatu-CE. CEP: 63.503-790; taianeirrigacao@gmail; [email protected]; [email protected]; 2Professores do Curso de Tecnologia em Irrigação e Drenagem, Instituto Federal de Educação Ciência e Tecnologia do Ceará – campus Iguatu, Rodovia Iguatu/Várzea Alegre, Km 05 – Vila Cajazeiras – Iguatu-CE. CEP: 63.503-790, [email protected]; 3Mestrando em Engenharia Agrícola, Departamento de Engenharia Agrícola, Universidade Federal do Ceará – campus do Pici, Centro de Ciências Agrárias – CCA/UFC, Bloco 804, Fortaleza CE, CEP: 60.455-760; [email protected].     1 RESUMO   O presente trabalho teve como objetivo analisar a uniformidade de distribuição de em um sistema de irrigação localizada, do tipo gotejamento operando em condições de campo sob diferentes pressões de serviços, por meio da determinação dos Coeficiente de Uniformidade de Christiansen (CUC), do Coeficiente de Uniformidade de Distribuição (CUD) e do Coeficiente de Uniformidade Estatística (Us). Em campo, foram utilizadas 4 linhas laterais escolhidas ao acaso e com o auxílio de proveta e cronômetro, foram aferidos os volumes de água em 4 gotejadores de parede delgada, em três repetição em um tempo de 60 segundos, observando as 3 diferentes pressões de serviço (5,1; 10,2 e 15,3 mca). A média dos valores encontrados para o Coeficiente de Uniformidade de Christiansen (CUC), Coeficiente de Uniformidade de Distribuição (CUD) e o Coeficiente de Uniformidade Estatística (Us) são considerados pela literatura especializada como excelentes.  Todavia, na pressão de serviço de 5,1 mca, a uniformidade de distribuição de água tende a ser comprometida. Infere-se, portanto, que o sistema de irrigação está bem dimensionado evitando assim danos financeiros, independente das pressões de serviços nas quais o mesmo esteja operando.   Palavras-Chave: uniformidade, microirrigação, alturas manométricas.     PEREIRA, T. DE A.; SILVA, A. R. A. DA; SOUSA, M. M. M. DE; SANTOS, C. DE F.; SANTOS, D. L. DOS SERVICE PRESSURES AND THEIR EFFECTS ON THE PERFORMANCE OF A DRIP IRRIGATION SYSTEM     2 ABSTRACT   The objective of this work was to analyze the distribution uniformity of a drip irrigation system located in field conditions under different service pressures, through the determination of the Coefficient of Uniformity of Christiansen (CUC), Coefficient of Distribution Uniformity (CUD) and Statistical Uniformity Coefficient (Us). In the field, 4 randomly selected lateral lines were used and with the aid of a beaker and stop watch, the water volumes were measured in 4 thin-walled drippers in three repetitions in a time of 60 seconds, observing the 3 different service pressures (5.1, 10.2 and 15.3 microns). The mean values found for the Christiansen Uniformity Coefficient (CUC), Uniform Distribution Coefficient (CUD) and the Statistical Uniformity Coefficient (Us) are considered by the specialized literature to be excellent. However, in the service pressure of 5.1 mca, the uniformity of water distribution tends to be compromised. It is inferred, therefore, that the irrigation system is well-sized working, thus avoiding financial damages, regardless of the pressures of services in which it is operating.   Keywords: uniformity, micro-irrigation, manometric heights.

scholarly journals Head and lateral length on water distribution uniformity of a PVC drip irrigation system

2014 ◽  
Vol 9 (30) ◽  
pp. 2298-2305 ◽  
Author(s):  
Evans ASENSO ◽  
Jiuhao LI ◽  
Hai-Bo CHEN ◽  
Emmanuel OFORI ◽  
Fuseini ISSAKA ◽  
...  
Keyword(s):  
Drip Irrigation ◽  
Water Distribution ◽  
Irrigation System ◽  
Drip Irrigation System ◽  
Distribution Uniformity ◽  
Lateral Length

scholarly journals Effect of Pulse Drip Irrigation Duration on Water Distribution Uniformity

Water ◽  
2020 ◽  
Vol 12 (8) ◽  
pp. 2276
Author(s):  
David Lozano ◽  
Natividad Ruiz ◽  
Rafael Baeza ◽  
Juana I. Contreras ◽  
Pedro Gavilán
Keyword(s):  
Drip Irrigation ◽  
Water Distribution ◽  
Crop Yields ◽  
Irrigation System ◽  
Irrigation Schedule ◽  
Sandy Soils ◽  
Field Evaluation ◽  
Irrigation Performance ◽  
Standard Procedures ◽  
Distribution Uniformity

Developing an appropriate irrigation schedule is essential in order to save water while at the same time maintaining high crop yields. The standard procedures of the field evaluation of distribution uniformity do not take into account the effects of the filling and emptying phases of the irrigation system. We hypothesized that, in sloping sandy soils, when short drip irrigation pulses are applied it is important to take into account the total water applied from the beginning of irrigation until the emptying of the irrigation system. To compute distribution uniformity, we sought to characterize the filling, stable pressure, and emptying phases of a standard strawberry irrigation system. We found that the shorter the time of the irrigation pulse, the worse the distribution uniformity and the potential application efficiency or zero deficit are. This effect occurs because as the volume of water applied during filling and emptying phases increases, the values of the irrigation performance indicators decrease. Including filling and emptying phases as causes of non-uniformity has practical implications for the management of drip irrigation systems in sloping sandy soils.

scholarly journals Evaluation of Uniformity Coefficient and Soil Moisture Distribution under Drip Irrigation System

2019 ◽  
pp. 1-9
Author(s):  
A. Selvaperumal ◽  
E. Sujitha ◽  
I. Muthuchamy
Keyword(s):  
Soil Moisture ◽  
Drip Irrigation ◽  
Goodness Of Fit ◽  
Irrigation System ◽  
Block Design ◽  
Moisture Distribution ◽  
Drip Irrigation System ◽  
Uniformity Coefficient ◽  
Rate Of Increase ◽  
Soil Moisture Distribution

Drip irrigation system uniformity can preserve a higher crop yield and deplete the initial investment of cost. The experiment was conducted at precision farming development centre research farm, Tamil Nadu Agricultural University, Coimbatore, to evaluate the uniformity coefficient and soil moisture distribution under drip irrigation system. The experiment was designed under Factorial Randomized Block Design (FRBD) which included three fertigation levels 80%, 100% and 120% of Recommended Dose of fertilizers which were replicated thrice. The Coefficient of Variation (CV) was obtained as 0.0207 per cent kept at a constant pressure of 50.66 kPa, Statistical Uniformity (SU) as 97 per cent and Coefficient of Uniformity (CU) as 0.9518. As the elapsed time increased, the rate of increase of wetted zone diameter decreased. A high R2 value of 0.97 shows the goodness of fit for the horizontal movement. The mean soil moisture distribution 39.2 per cent was observed below the emitter at the depth of 10 cm immediately after irrigation.

scholarly journals Design, Development and Evaluation of a Bucket Drip Irrigation System for Dry Season Vegetable Production in South-Eastern Nigeria

2021 ◽  
Vol 2 (1) ◽  
pp. 183-192
Author(s):  
Donatus Okwudiri IGBOJIONU ◽  
Christopher Ikechi OBINECHE ◽  
Juliet Nnennaya IGBOJIONU
Keyword(s):  
Drip Irrigation ◽  
Irrigation System ◽  
Dry Season ◽  
Internal Diameter ◽  
Vegetable Production ◽  
Drip Irrigation System ◽  
Design Development ◽  
Short Supply ◽  
Uniformity Coefficient ◽  
South Eastern

In South-Eastern Nigeria, during the dry season from November to April, vegetables are always in short supply and consequently expensive. Hence, there is a need to design, develop an affordable and simple bucket drip irrigation system that can be used to grow vegetables under limited water supply conditions. Using the estimated consumptive use of the proposed crop okra and the area occupied by the crop stands, the capacity of the bucket as a source of water was computed. The bucket filled with water was placed at a head of 1 m. The water was allowed to flow through emitters located at 30 cm intervals along the lateral lines laid at the land slope of 2%. Two lengths of PVC tubes 11 m long, 1 mm thick and internal diameters 16 mm, Micro-tubes 5 cm long and internal diameter 1.2 mm, were used. The discharge from each emitter was determined through volumetric measurements. The system was then evaluated using the Christiansen’s method and the Merriam and Keller’s method and assessed using ASAE standards 1996(a) and 1996(b) performance rating. 22 sampled emitters evaluated from the lateral line showed total energy drop of 2.5 x 10-5 m, flow variation (FV) of 8%, coefficient of variation (CV) of emitter discharge of 0.02, uniformity coefficient (UC) of 97% and emission uniformity (EU) of 73%. The results show that the system is efficient and can be used by farmers to meet the demands for vegetables in the dry season.

scholarly journals Performance Assessment of Drip System of Irrigation used for Cultivating Tomato in Premises of the Centre of Excellence Protected Cultivation, Raipur, Chhattisgarh, India

2021 ◽  
pp. 34-40
Author(s):  
Vijay Sahu ◽  
Jeet Raj ◽  
Sanket Kolambe ◽  
. Aman
Keyword(s):  
Performance Assessment ◽  
Lateral Line ◽  
Drip Irrigation ◽  
Irrigation System ◽  
Maximum Flow ◽  
Drip Irrigation System ◽  
Flow Variation ◽  
Protected Cultivation ◽  
Centre Of Excellence ◽  
Lateral Lines

A technical report was conducted for checking performance assessment of drip irrigation system which was used for cultivating tomato in premises of the Centre of Excellence Protected Cultivation, Raipur (Chhattisgarh). A uniformity coefficient was found for drip irrigation system which ranges from 73.2 % to 83.6%. The coefficient of variance varies between 0.0055 to 0.0068 for the measured discharges of four laterals laid in the field. It shows that there is the least variation between the obtained flow rates of different laterals under study. The application efficiency of four different lateral lines operating at a pressure of 1.25 kg/cm2 was calculated and it found to be more than 90.00 %, excluding lateral line (L2). Almost same amount of flow variation (8-9%) is found in lateral lines L1, L3 and L4, although Lateral line (L2) discharges 11.00 % more water among others. The maximum flow variation was found for the lateral line (L3) and the least flow variation was for the lateral line (L1). The distribution efficiency of all the laterals was found more than 97.45 %.

scholarly journals Methodology for designing lateral lines with microtubes operated under variable inlet pressure

2017 ◽  
Vol 21 (9) ◽  
pp. 594-599
Author(s):  
Geancarlo T. Katsurayama ◽  
Ezequiel Saretta ◽  
Antonio P. de Camargo ◽  
Tarlei A. Botrel ◽  
Conan A. Salvador
Keyword(s):  
Lateral Line ◽  
Water Distribution ◽  
Electrical Power ◽  
Step Method ◽  
Power Sources ◽  
Wide Range ◽  
Lateral Lines ◽  
Alternative Power ◽  
Distribution Uniformity ◽  
Micro Irrigation

ABSTRACT Design of lateral lines consisting of microtubes enables to optimize water distribution uniformity. In addition, there must exist a range of pressures at the lateral line inlet in which the water distribution uniformity remains acceptable. Thus, such emitters are interesting for use in micro-irrigation systems supplied by alternative power sources, in which temporal variability in the electrical power supplied to the pumping systems normally occurs. This study presents a methodology for designing lateral lines with microtubes operated under varying pressure, using the step-by-step method in order to establish the recommended range of lateral line inlet pressures. The proposed methodology was validated over three replicates by testing maximum, minimum and optimum pressures. Deviation between estimated and observed values of flow rate was lower than 6%, indicating a satisfactory accuracy. Distribution uniformity of the system was higher than 95% under all pressures within the estimated range of values. Lateral lines can operate within a wide range of operating pressures and even so satisfactory results of distribution uniformity are obtained.

scholarly journals Effect of pipe type and Emitters discharge on performance criteria of surface drip irrigation system

2021 ◽  
Vol 904 (1) ◽  
pp. 012013
Author(s):  
B A AL-Dulaimi ◽  
Sh M AL-Mehmdy
Keyword(s):  
Coefficient Of Variation ◽  
Drip Irrigation ◽  
Irrigation System ◽  
Performance Criteria ◽  
Research Station ◽  
Operating Pressure ◽  
Drip Irrigation System ◽  
Design Discharge ◽  
Distribution Uniformity ◽  
Surface Drip Irrigation

Abstract A field experiment was conducted in Jazeerah Al-Ramadi/Al-Hamidiyah research station (latitude33^o 27^’ 〖 11.9 〗 ^(՚՚)N, longitude 43^o 23^’ ^(՚՚) E (duration 2020. This study was conducted to investigate the effect of pipe types and emitters discharge on performance criteria of surface drip irrigation system. Therefore, a two factorial experiment was set as randomized complete block design with three replications. The first factor included the type of pipes and emitters, namely Turbo, GR and T-Tape. While the second factor involved the emitters discharge which consist of two levels i.e., 4 (D4) and 8 (D8) L.h-1. The irrigation system was initially evaluated in the field before planting by testing three operating pressures (50, 100 and 150 Kpa) to determine the actual discharge of the emitters closed to their design discharge (4 and 8 L.h-1) for each emitter to calculate the manufacturing coefficient of variation (CV), distribution uniformity and the discharge variation ratio at each operating pressure. Results showed that the best discharge (Closed to design discharge of 4 L.h-1) was obtained at the 50 Kpa operating pressure which gave 3.99,3.90 and 3.81 L.h-1 when using the T-Tape pipe and GR and Turbo emitter compare when the discharge of 8L.h-1 has been used which gave 7.96, 7.84 and 7.59 L.h-1 when the former pipe and emitters were used. The best coefficient of variation was observed when the T-Tape pipe and GR and Turbo emitter were used with discharge of 4 L.h-1 up to 0.1300, 0.2200 and 0.2600 compare to 0.1300, 0.2700 and 0.3500 when the same former pipe and emitters were used with discharge of 8L. h-1. Similarly, the best distribution uniformity was obtained when the T-Tape pipe and GR and Turbo emitter has been used with discharge of 4 L.h-1 which gave 94.68, 91.74 and 90%. Likewise, the most acceptable variety discharge ratio was observed when the same prior pipe and emitters were used with discharge of 4 L.h-1 by giving 7.23, 11.90 and 12.19 %.

Sign in / Sign up

Export Citation Format

Share Document