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 %.

scholarly journals A field study on hydraulic performance of drip irrigation system for optimization of operating pressure

2017 ◽  
Vol 9 (4) ◽  
pp. 2261-2263
Author(s):  
Mairaj Hussain ◽  
Sudhiranjan Prasad Gupta
Keyword(s):  
Field Experiment ◽  
Field Study ◽  
Coefficient Of Variation ◽  
Drip Irrigation ◽  
Irrigation System ◽  
Pressure Head ◽  
Maximum Efficiency ◽  
Operating Pressure ◽  
Drip Irrigation System ◽  
Irrigation Technology

Drip irrigation technology will undoubtedly plays an important role in the future of the agriculture. A field experiment was conducted to evaluate the performance of drip system with five operating pressure viz. I1 (0.4 kg/ cm2), I2 (0.6 kg/cm2), I3 (0.8 kg/cm2), I4 (1.0 kg/cm2), I5 (1.2 kg/cm2). It was observed that the average discharge of drippers was 1.08 lph, 1.24 lph, 1.50 lph, 1.62 lph and 1.74 lph and emission uniformity was 80.55%, 84.89%, 86.30%, 88.88% and 90.80 in each treatment respectively and coefficient of variation was observed 0.12, 0.13, 0.12, 0.11, and 0.09. Flow component was found 0.450 and the value of k was 0.572 while R2 was observed 0.986.Based on the result it can be concluded that the operation of drip irrigation system at 1.2 kg/cm2 pressure head, gives the maximum efficiency in respect of discharge, emission uniformity and coefficient of variation.

scholarly journals Study of Some Hydraulic Parameters of A solar-Powered Drip Irrigation System

2021 ◽  
Vol 910 (1) ◽  
pp. 012015
Author(s):  
Hussein Razzaq Nayyef
Keyword(s):  
Coefficient Of Variation ◽  
Drip Irrigation ◽  
Irrigation System ◽  
Hydraulic Parameters ◽  
Drip Irrigation System ◽  
Variance Ratio ◽  
Consistency Coefficient ◽  
Design Discharge ◽  
Solar Powered

Abstract An experiment was carried out in Al-Rifai District - Dhi Qar Governorate, to study the effect of the distance between drippers and their discharge on friction losses, coefficient of variation, and emission consistency of the drip irrigation system. Spiral drippers with a design discharge of 4 and 8 L.hr"1. While the emitters were installed at distances of 20, 40, 60 (cm). The actual discharge of the droplets was measured and the friction losses, emission consistency coefficient, and discharge variance ratio were calculated. The results showed that the distance between the emitters 60 cm gave the lowest percentage of friction losses, which amounted to 0.165, 0.204 (m) for drippers with design drainage of 4, 8 L.hr-1. The best values of the emission consistency coefficient and the variance ratio in the emitters discharge were 95.44 and 28.41% when using the 8L.hr-1 and the distance between the emitters is 60 cm, respectively.

Analyzing Soil Moisture Uniformity for Surface Drip Irrigation System in Multi-layered soil

2011 ◽  
Author(s):  
Soon Goon Choi ◽  
Jin-Yong Choi ◽  
Won-Ho Nam ◽  
Eun Mi Hong ◽  
Sang-Ho Jeon
Keyword(s):  
Soil Moisture ◽  
Drip Irrigation ◽  
Irrigation System ◽  
Layered Soil ◽  
Drip Irrigation System ◽  
Surface Drip Irrigation

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 Re-designing irrigated intensive cereal systems through bundling precision agronomic innovations for transitioning towards agricultural sustainability in North-West India

2019 ◽  
Vol 9 (1) ◽  
Author(s):  
H. S. Jat ◽  
P. C. Sharma ◽  
Ashim Datta ◽  
Madhu Choudhary ◽  
S. K. Kakraliya ◽  
...  
Keyword(s):  
Irrigation Water ◽  
Drip Irrigation ◽  
Irrigation System ◽  
Water Productivity ◽  
Crop Productivity ◽  
Drip Irrigation System ◽  
Flood Irrigation ◽  
Energy Productivity ◽  
North West ◽  
Surface Drip Irrigation

AbstractA study was conducted to design productive, profitable, irrigation water¸ nitrogen and energy use efficient intensive cereal systems (rice-wheat; RW and maize-wheat; MW) in North-West India. Bundling of conservation agriculture (CA) with sub-surface drip irrigation termed as CA+ were compared with CA alone and conventional tillage based and flood irrigated RW rotation (farmer’s practice; ScI). In contrast to conventional till RW rotation which consumed 1889 mm ha−1 irrigation water (2-yr mean), CA+ system saved 58.4 and 95.5% irrigation water in RW and MW rotations, respectively. CA+ practices saved 45.8 and 22.7% of irrigation water in rice and maize, respectively compared to CA with flood irrigation. On a system basis, CA+ practices saved 46.7 and 44.7% irrigation water under RW (ScV) and MW (ScVI) systems compared to their respective CA-based systems with flood irrigation (ScIII and ScIV). CA+ in RW system recorded 11.2% higher crop productivity and improved irrigation water productivity by 145% and profitability by 29.2% compared to farmers’ practice. Substitution of rice with maize (MW system; ScVI) recorded 19.7% higher productivity, saved 84.5% of irrigation water and increased net returns by 48.9% compared to farmer’s practice. CA+ RW and MW system improved energy productivity by 75 and 169% and partial factor productivity of N by 44.6 and 49.6%, respectively compared to ScI. The sub-surface drip irrigation system saved the fertilizer N by 20% under CA systems. CA+ in RW and MW systems recorded ~13 and 5% (2-yr mean) higher profitability with 80% subsidy on installing sub-surface drip irrigation system and similar profitability without subsidy scenario compared with their respective flood irrigated CA-based systems.

Effect of Low Pressure on Irrigation Uniformity of Solid Set Sprinkler Irrigation System

2014 ◽  
Vol 567 ◽  
pp. 26-31
Author(s):  
Manal Osman ◽  
Suhaimi B. Hassan ◽  
Khamaruzaman Wan Yusof
Keyword(s):  
Coefficient Of Variation ◽  
Rotation Speed ◽  
Irrigation System ◽  
Sprinkler Irrigation ◽  
Low Pressure ◽  
Nozzle Diameter ◽  
Operating Pressure ◽  
Irrigation Uniformity ◽  
Distribution Uniformity ◽  
Design Factors

The irrigation requires an efficient and effective method of water application to realize maximum return and conserve water resources. The low pressure sprinkler irrigation system is the most commonly used due to: its low energy cost, but the irrigation uniformity of this system is not constantly good because it is affecting by the design factors such as: nozzle type, nozzle diameter, operating pressure and spacing layout. But the most important factors are the operating pressure and nozzle diameter. In this study the effect of low pressure on the irrigation uniformity of the solid set sprinkler irrigation system was studied. Different low operating pressures (62, 82, 102 and122 kPa) were selected and different nozzle diameters (4, 5 and 7 mm) were used. The solid set layout was square (12 m between the sprinklers along the line and 12 m among the line). The catch-cans test was used to determine the uniformity coefficients such as: Christiansen’s coefficient of uniformity (CU), coefficient of variation (CV), distribution uniformity of low quarter (DUlq) and distribution uniformity of low half (DUlh). The distribution characteristics such as: throw radius and rotation speed were monitored. A comparison was made between the results obtained from different combination of operating pressures and nozzle diameters. The results of this study showed that, CU, DUlqand DUlhwere increased when the pressure increased for all the nozzles. The greater values of CU, DUlqand DUlhwere found with the combination of 7 mm nozzle diameter and 122 kPa. The coefficient of variation was increased when the pressure decreased for all the nozzles. The throw radius and rotation speed were increased gradually when the pressure increased. The throw radius was not significantly affected by the nozzle diameter while the rotation speed was more affected by the nozzle diameter.

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