scholarly journals Study of the Hydraulic Performance Parameters of the Drip Irrigation System at Various Operating Pressures

2020 ◽  
Author(s):  
Parth J. Kapupara ◽  
Hina M. Bhatu ◽  
Jay Gohel
Keyword(s):  
Performance Evaluation ◽  
Drip Irrigation ◽  
Irrigation System ◽  
High Water ◽  
Hydraulic Performance ◽  
Operating Pressure ◽  
Drip Irrigation System ◽  
Uniformity Coefficient ◽  
Pressure Discharge ◽  
American Society

Background: Drip irrigation system is one of the best water application methods that have been used in the world among the other irrigation methods because of its upright and high uniformity and high-water use efficiency. Hydraulic performance evaluation is widely accepted for the evaluation of overall uniformity of a drip irrigation system. Methods: In an experimental study carried out at School of Engineering, RK University, Rajkot; hydraulic performance evaluation parameters viz., Pressure discharge relationship, Christiansen’s uniformity coefficient (CU), manufacturing coefficient of variation (CVm) and emission uniformity (EU) of non-pressure compensating emitters were calculated for 2 lph inline and 2 lph, 4 lph, 8 lph online emitter at various operating pressure of 0.8, 0.9, 1.0, 1.1 and 1.2 kg/cm2 as per American Society of Agricultural and Biological Engineers (ASAE) standards. Result: The study concluded that rated discharge of the emitter can be obtained at the operating pressure of 1.0 kg/cm2. Pressure discharge relationship revealed that discharge of the emitter upsurges as pressure rises. CU and EU were more than 95% for all the cases and they were maximum at 1.0 kg/cm2. CVm was less than 0.0200 for all the cases and it was minimum at 1.0 kg/cm2. Study concludes that all the parameter viz., CU, EU and CVm were excellent and very good categories for all emitters as per American Society of Agricultural and Biological Engineers (ASAE) standards.

scholarly journals Hydraulic Performance Analysis of Drip Irrigation System Using Pressure Compensated Dripper at Low Operating Pressure

2021 ◽  
Author(s):  
Eddy Herman Sharu
Keyword(s):  
Drip Irrigation ◽  
Irrigation System ◽  
Low Pressure ◽  
Hydraulic Performance ◽  
Uniform Flow ◽  
Hydraulic Parameters ◽  
Operating Pressure ◽  
Drip Irrigation System ◽  
Flow Variation ◽  
Flow Rate Coefficient

Irrigation is the most important component in ensuring that crops can produce optimal yields. The use of drip irrigation can help farmers in providing water to crops in the amount required by the crop. Drip irrigation usually uses an uncompensated dripper and also a pressure compensated dripper. The use of an uncompensated dripper requires precise pressure to ensure a uniform flow for each dripper while the use of a pressure compensated dripper will also provide a uniform flow when operating pressure was used within the range specified by the dripper manufacturer. The purpose of this study is to evaluate the hydraulic performance of the drip irrigation system using low pressure compared to the minimum pressure recommended by dripper manufacturers. The pressure operation recommended by the manufacturer is 1.5-4 bars. This study uses pressures as low as 1 bar (low pressure), 2 bars, and 2.5 bars (recommended by manufacture) to operate this irrigation system. The volumetric approach was used to calculate each emitter's flow rate. Coefficient uniformity (CU), emission uniformity (EU), coefficient of variation (CV), and emitter flow variation (EFV) were the hydraulic parameters evaluated. The results show that CU, CV, and EU are in excellent classification, and the value for CU and the EU is more than 95 percent efficiency. The CV value is below 0.03 which is a very good classification. Meanwhile, emitter flow variation is 10% when operating at 2.5 bars and 2.0 bars and is considered the desirable classification. On the other hand, the emitter flow variation was reported at 6% for the 1 bar operating pressure and the classification was also recorded in the desirable classification. The results conclude that the use of low operating pressure compared to the minimum operating pressure proposed by the manufacturer can also operate in excellent condition according to the hydraulic parameters evaluated.

scholarly journals Hydraulic Performance and Modelling of Pressurized Drip Irrigation System

Water ◽  
2020 ◽  
Vol 12 (8) ◽  
pp. 2295
Author(s):  
Eddy Herman Sharu ◽  
Mohd Shahrizal Ab Razak
Keyword(s):  
Power Consumption ◽  
Drip Irrigation ◽  
Irrigation System ◽  
Hydraulic Performance ◽  
Mean Bias Error ◽  
Small Scale ◽  
Bias Error ◽  
Hydraulic Parameters ◽  
Operating Pressure ◽  
Drip Irrigation System

This study was conducted at Laman Sayur, Malaysia Agro Exposition Park Serdang (MAEPS), to investigate the hydraulic performance of a small-scale drip irrigation system. The modelling was carried out using EPANET software to understand how the drip irrigation system is operated. Model results show that the errors are small, i.e., 2.2% and 3.0% for pressures, and 1.7% for discharge in lateral pipe 1 and lateral pipe 2. The root mean square error (RMSE) and the mean bias error (MBE) for discharge were recorded at 0.04 L/h and 0.03 L/h for lateral pipe 1 and 0.04 L/h and 0.02 L/h for lateral pipe 2. RMSE and MBE for pressure were recorded at 0.61 m and 0.68 m for lateral pipe 1, and 0.79 m and 0.68 m for lateral pipe 2, respectively. These results show that the model yields good performance. For hydraulic performance, the field measurement was conducted with four operating pressures: P1 (15.3), P2 (20.4), P3 (25.5), and P4 (28.6) meters. The hydraulic parameters evaluated were the coefficient of uniformity (CU), the emission uniformity (EU), the coefficient of variation (CV), and the emitter flow variation (EFV). The operating pressure during the measurement is constant according to the specified pressure. The results show that CU, CV, and EU are in the excellent classification, and values of CU and EU have more than 95% efficiency. The value for CV is below 0.03, which is excellent. The EFV is 10% when operating at 25.5 m and 15.3 m and is considered desirable. On the other hand, for the 28.6 m and 15.3 m operating pressures, the EFV parameters were recorded at 13.6% and 10.29%, respectively, and are classified acceptable. This study concluded that the operating pressures, P2 (20.4 m) and P3 (25.5 m), were performed under excellent classification for all hydraulic parameters evaluated. Based on the outputs from the model, it is inferred that the existing drip irrigation system at Laman Sayur MAEPS is operated in an over-powered state. With the current pump power consumption, the irrigation system could be operated at a minimum of four times the capacity of the existing irrigation system. To reduce the power consumption, it is suggested that the system is operated at a lower pumping power. This would minimize the operating costs especially for the development of a new drip irrigation system that has the same capacity as the drip irrigation system that is currently being operated at Laman Sayur, MAEPS Serdang.

scholarly journals PERFORMANCE EVALUATION OF HYDRAULIC PARAMETERS OF A DEVELOPED DRIP IRRIGATION SYSTEM

2019 ◽  
Vol 31 (2) ◽  
Author(s):  
Olorunwa Eric Omofunmi ◽  
Oluwaseun Ayodele Ilesanmi ◽  
Toluwalase Orisabinone
Keyword(s):  
Drip Irrigation ◽  
Irrigation System ◽  
Chemical Properties ◽  
Application Rate ◽  
Drip Irrigation System ◽  
Flow Variation ◽  
Agricultural Engineering ◽  
Normal Soil ◽  
Coefficient Of Uniformity ◽  
American Society

Experiment was carried out in the department of Agricultural and Bioresources Engineering, during the period of August to October, 2017. The hydraulic performance of a developed drip irrigation system was assessed. The experimental work was conducted on field with irrigated field area of 7 m x 3 m and lateral spacing was 0.35 m. Sixty (60) hospital drip sets (given sets) were used for the experiment as improved emitters. Volumetric method was used to determine application rate (PR) and emitters discharge. The emission uniformity, emitter flow variation, co-efficient of uniformity and co-efficient of variation were determined accordance with the equations described by the American Society of Agricultural Engineering (ASAE). Soil chemical properties were determined accordance with the American Public Health Association (APHA). The findings revealed that the soil in the area is classified as sand clay loam and normal soil. Results indicated that the mean and standard deviation of the emitters were 9.639 L/hr and 0.07 L/hr respectively. There were no emitters clogging. The emitter flow variation was 2.5 % and less than 10 % which was desirable range, while coefficient of variation was 0.07 and less than 0.11 which was marginal. The application rate was 17 mm hr-1 which was within the recommended range of 15 – 25 mm hr-1. The emission uniformity and coefficient of uniformity were 99.4% and 99.2% respectively, which shows that the system was well-designed. This finding indicated that hospital drip sets proved to the high quality. Therefore, it can be used as standard emitter.

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 Evaluation of Drip Irrigation System and Profitability Analysis of Leafy Vegetables under Polyhouse

2020 ◽  
pp. 20-26
Author(s):  
A. Kishore ◽  
Nithin Deshai ◽  
R. Savitha Rathdo ◽  
J. Surya Prakash ◽  
Y. Siva Lakshmi
Keyword(s):  
Performance Evaluation ◽  
Drip Irrigation ◽  
Irrigation System ◽  
Leafy Vegetables ◽  
Cost Ratio ◽  
Drip Irrigation System ◽  
Green Leafy Vegetables ◽  
Benefit Cost Ratio ◽  
Profitability Analysis ◽  
Benefit Cost

The present experiment on Performance evaluation of drip irrigation system and profitability analysis of leafy vegetables under polyhouse was conducted to study the performance parameters of the drip irrigation systems relating to crop performance. This was done by taking existing drip tapeline, new drip tape line and new inline drip irrigation system under the Polyhouse at the college of Agricultural Engineering, Kandi, Sangareddy, Telangana during the year 2018. Profitability of five green leafy vegetables viz. Palak, Sorrel, Methi, Amaranths and Coriander was also evaluated. The results reveal that the three drip line systems in-line got more uniform coefficient of 98% followed by new drip tape with 96% and preinstalled drip tape with 95%. Among the five green leafy vegetables methi has recorded highest gross (306000Rs acre-1) and net returns (285833) and benefit cost ratio (14.2) followed by Palak, Sorrel whereas Amaranthus has recorded lowest benefit cost ratio (7.6).  In terms of performance characteristics, drip tape and in line system performed better in maintaining uniformity discharge and the designed drip irrigation operated excellently.  Methi, Palak ad sorrel found suitable and profitable in polyhouse where year- round cultivation of vegetables is feasible compared to open field in which crop establishment was very poor and could not be raised successfully due the heavy rains and growth characters of the leafy crops.

Sign in / Sign up

Export Citation Format

Share Document