The African market garden: The development of a low-pressure drip irrigation system for smallholders in the sudano sahel

2011 ◽  
Vol 60 (5) ◽  
pp. 613-621 ◽  
Author(s):  
Lennart Woltering ◽  
Dov Pasternak ◽  
Jupiter Ndjeunga
Keyword(s):  
Drip Irrigation ◽  
Irrigation System ◽  
Low Pressure ◽  
Drip Irrigation System

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.

Drip irrigation technology for potatoes through applying low-pressure semistationary small-capacity

2021 ◽  
Vol 0 (6) ◽  
pp. 4-8
Author(s):  
Daler Domullodzhanov
Keyword(s):  
Drip Irrigation ◽  
Laboratory Experiments ◽  
Irrigation System ◽  
Low Pressure ◽  
Annual Precipitation ◽  
Drip Irrigation System ◽  
Irrigation Technology ◽  
Small Capacity ◽  
Irrigation Requirements

The article describes the results of field and laboratory experiments on the study of the technology of drip irrigation of potatoes via using the semi-stationary low-pressure small-capacity drip irrigation system (LDIS) developed by us. Reinforced aluminium micro-tubes ensure uniform watering. Depending on the annual precipitation sufficiency, the potatoes irrigation requirements 1700…3400 m3/ha, the number of irrigations varied from 10 to 20 times, and the yield was between 54…58,2 tons per ha.

scholarly journals Energy Reduction and Uniformity of Low-Pressure Online Drip Irrigation Emitters in Field Tests

Water ◽  
2019 ◽  
Vol 11 (6) ◽  
pp. 1195 ◽  
Author(s):  
Julia Sokol ◽  
Susan Amrose ◽  
Vinay Nangia ◽  
Samer Talozi ◽  
Elizabeth Brownell ◽  
...  
Keyword(s):  
Drip Irrigation ◽  
Energy Cost ◽  
Irrigation System ◽  
Low Pressure ◽  
Field Trials ◽  
Capital Cost ◽  
Energy Reduction ◽  
Treated Wastewater ◽  
Irrigation Season ◽  
Drip Irrigation System

A promising way of addressing the issue of growing water scarcity is through wider use of drip irrigation, which delivers water and fertilizer to crops in a slow, targeted manner, and has been shown to increase yields and water use efficiency. Yet, drip irrigation system adoption is low, primarily due to the high capital cost of the pressurized piping network and the pump, and operating energy cost. Lowering the water pressure needed for drip emitters to deliver water can reduce both capital and operating costs of drip systems. Here we present the results from field trials of new pressure-compensating online drip emitters that operate with a minimum compensating inlet pressure of 15 kPa (0.15 bar), in comparison to typical commercial emitters with minimum pressures of 50–100 kPa (0.5–1.0 bar). The field trials were carried out on nine farms in Morocco and Jordan over the course of one irrigation season with freshwater and treated wastewater. Low-pressure emitters are shown to reduce hydraulic energy per unit volume of water delivered by 43% on average compared to commercial emitters, without significantly sacrificing water emission uniformity (low-pressure emitters show uniformities of 81–91%, compared to 87–96% for commercial emitters). This energy reduction could lead to savings of 22–31% in the capital cost of a pump and emitters and the energy cost for a typical drip irrigation system. Thus, the low-pressure online emitters can be used as substitutes to commercial emitters that require higher water pressures, leading to reduced environmental impact and lower system costs.

Optimization of Low-Pressure Hydrocyclone Sizes for Drip Irrigation System

2020 ◽  
Vol 12 (05-SPECIAL ISSUE) ◽  
pp. 191-198
Author(s):  
Aleksander Kalashnikov ◽  
Nurlan Abduramanov ◽  
Pavel Kalashnikov ◽  
Aigul Bayzakova ◽  
Nurzhau Rysmahanov
Keyword(s):  
Drip Irrigation ◽  
Irrigation System ◽  
Low Pressure ◽  
Drip Irrigation System

ESTIMATION OF CONSUMPTIVE USE OF POTATO CROP PIANTED UNDER DRIP IRRIGATION SYSTEM BY USING SWRT TECHNOLOGY

2020 ◽  
Vol 10 (1) ◽  
pp. 271-282
Author(s):  
J.N. Abedalrahman ◽  
R.J. Mansor ◽  
D.R. Abass
Keyword(s):  
Water Consumption ◽  
Drip Irrigation ◽  
Soil Depth ◽  
Irrigation System ◽  
Potato Crop ◽  
Block Design ◽  
Organic Fertilizer ◽  
Control Treatment ◽  
Drip Irrigation System ◽  
Spring Season

A field experiment was carried out in the field of the College of Agriculture / University of Wasit, located on longitude  45o   50o   33.5o   East and latitude 32o 29o 49.8o North, in Spring season of the agricultural season 2019, in order to estimate the water consumption of potato crop using SWRT technology and under the drip irrigation system. The experiment was designed according to Randomized Complete Block Design (RCBD) with three replications and four treatments that include of the SWRT treatment (the use of plastic films under the plant root area in an engineering style), and the treatment of vegetal fertilizer (using Petmos), organic fertilizer (sheep manure), and the control treatment . Potato tubers (Solanum tuberosum L.)  var. Burin was planted for spring season on 10/2/2019 at the soil depth of 5-10 cm. The highest reference water consumption for the potato crop during the season was calculated by Najeeb Kharufa, which was 663.03 mm. The highest actual water consumption for the potato crop during the season for the control treatment was 410.1 mm. The results showed increase in the values of the crop coefficient (Kc) in the stages of tubers formation and tubers filling stage as compared to the vegetative and ripening stages, ranged from 1.37-1.92 for the two stages of tubers formation and tubers filling. The SWRT treatment gave the highest water use efficiency during the season, was 3.46 kg m-3 .

A kinetic model for the chemical clogging of drip irrigation system using saline water

2019 ◽  
Vol 223 ◽  
pp. 105696 ◽  
Author(s):  
Lili Zhangzhong ◽  
Peiling Yang ◽  
Wengang Zhen ◽  
Xin Zhang ◽  
Caiyuan Wang
Keyword(s):  
Kinetic Model ◽  
Drip Irrigation ◽  
Saline Water ◽  
Irrigation System ◽  
Drip Irrigation System
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