Evaluation Performance of several types of pressure compensating emitters available in Iranian Market
One of the most important factors in trickle irrigation system is selecting the emitter, this is due to the fact that, the drip irrigation function depends on the emitter type and design method. In the present study, performance of 11 types of pressure compensating emitters available on the market,...
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Shahid Chamran University of Ahvaz
2009-06-01
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doaj-1e9afb65b1c7493ea19f1c337a1db61b2020-11-25T03:17:49ZfasShahid Chamran University of Ahvazعلوم و مهندسی آبیاری2588-59522588-59602009-06-01331163010.22055/jise.2009.1339313393Evaluation Performance of several types of pressure compensating emitters available in Iranian MarketMasoomeh Farasati0Majid Behzad1Saeed Boroomand-Nasab2Ph.D. Student, Department of Irrigation & Drainage. Shahid Chamran University, Ahwaz, Iran.Professors, Water Sciences Engineering Facualty, Shahid Chamran University, Ahwaz, Iran.Shahid Chamran University of Ahwaz, Faculty of Water Sciences EngineeringOne of the most important factors in trickle irrigation system is selecting the emitter, this is due to the fact that, the drip irrigation function depends on the emitter type and design method. In the present study, performance of 11 types of pressure compensating emitters available on the market, have been investigated regarding their uniformity of discharge. For this purpose, 18 samples of each kind of emitters with nominal discharges 2, 4, 8 and 24 L/hr, were chosen randomly and different discharges were examined in various operating pressures. The experiments were conducted according to ISO 9261, in the Water Sciences Engineering lab of Shahid Chamran University Ahwaz, Iran. The emitters were coded from A<sub>1</sub> to M<sub>4</sub> respectively. Ten operating pressure levels of 3, 4, 5, 6, 10, 15, 20, 30, 35 and 40 m were used in each sample. Emitters used in the study were classified based on the 3 indexes, emitter exponent (x) in the emitter function (q=kh<sup>x</sup>), determination coefficient (R<sup>2</sup>) and relative error (E<sub>r</sub>). The emitter exponent (x) ranged from -0.0067 to -0.4969 which the minimum belongs to C<sub>2 </sub>and the maximum belongs to C<sub>1</sub>. The determination coefficient (R<sup>2</sup>), varied from 0.0007 to 0.609 where the lowest range belongs to M<sub>4 </sub>and the highest range belongs to D<sub>1</sub>. The variation of E<sub>r</sub> was between 0.1 and 34.6 corresponding to E<sub>2</sub> and A<sub>2</sub> respectively. The results indicated that, regarding pressure compensation, emitter J ranked the best while emitter D<sub>1</sub> ranked last.http://jise.scu.ac.ir/article_13393_bbba3488b9ee5f80e9a2f10266d4ace2.pdfdrip irrigationpressure compensating emitterdripperdischarge |
collection |
DOAJ |
language |
fas |
format |
Article |
sources |
DOAJ |
author |
Masoomeh Farasati Majid Behzad Saeed Boroomand-Nasab |
spellingShingle |
Masoomeh Farasati Majid Behzad Saeed Boroomand-Nasab Evaluation Performance of several types of pressure compensating emitters available in Iranian Market علوم و مهندسی آبیاری drip irrigation pressure compensating emitter dripper discharge |
author_facet |
Masoomeh Farasati Majid Behzad Saeed Boroomand-Nasab |
author_sort |
Masoomeh Farasati |
title |
Evaluation Performance of several types of pressure compensating emitters available in Iranian Market |
title_short |
Evaluation Performance of several types of pressure compensating emitters available in Iranian Market |
title_full |
Evaluation Performance of several types of pressure compensating emitters available in Iranian Market |
title_fullStr |
Evaluation Performance of several types of pressure compensating emitters available in Iranian Market |
title_full_unstemmed |
Evaluation Performance of several types of pressure compensating emitters available in Iranian Market |
title_sort |
evaluation performance of several types of pressure compensating emitters available in iranian market |
publisher |
Shahid Chamran University of Ahvaz |
series |
علوم و مهندسی آبیاری |
issn |
2588-5952 2588-5960 |
publishDate |
2009-06-01 |
description |
One of the most important factors in trickle irrigation system is selecting the emitter, this is due to the fact that, the drip irrigation function depends on the emitter type and design method. In the present study, performance of 11 types of pressure compensating emitters available on the market, have been investigated regarding their uniformity of discharge. For this purpose, 18 samples of each kind of emitters with nominal discharges 2, 4, 8 and 24 L/hr, were chosen randomly and different discharges were examined in various operating pressures. The experiments were conducted according to ISO 9261, in the Water Sciences Engineering lab of Shahid Chamran University Ahwaz, Iran. The emitters were coded from A<sub>1</sub> to M<sub>4</sub> respectively. Ten operating pressure levels of 3, 4, 5, 6, 10, 15, 20, 30, 35 and 40 m were used in each sample. Emitters used in the study were classified based on the 3 indexes, emitter exponent (x) in the emitter function (q=kh<sup>x</sup>), determination coefficient (R<sup>2</sup>) and relative error (E<sub>r</sub>). The emitter exponent (x) ranged from -0.0067 to -0.4969 which the minimum belongs to C<sub>2 </sub>and the maximum belongs to C<sub>1</sub>. The determination coefficient (R<sup>2</sup>), varied from 0.0007 to 0.609 where the lowest range belongs to M<sub>4 </sub>and the highest range belongs to D<sub>1</sub>. The variation of E<sub>r</sub> was between 0.1 and 34.6 corresponding to E<sub>2</sub> and A<sub>2</sub> respectively. The results indicated that, regarding pressure compensation, emitter J ranked the best while emitter D<sub>1</sub> ranked last. |
topic |
drip irrigation pressure compensating emitter dripper discharge |
url |
http://jise.scu.ac.ir/article_13393_bbba3488b9ee5f80e9a2f10266d4ace2.pdf |
work_keys_str_mv |
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