scholarly journals MODIFICATION OF WATER APPLICATION UNIFORMITY AMONG CLOSED CIRCUIT TRICKLE IRRIGATION SYSTEMS

2010 ◽  
Vol 27 (3) ◽  
pp. 903-923
Author(s):  
H.A. Abdel-Ghani ◽  
M.Y. Tayel ◽  
D.A. Lightfoot ◽  
A. M. El-Gindy
Keyword(s):  
Closed Circuit ◽  
Water Application ◽  
Trickle Irrigation ◽  
Irrigation Systems

scholarly journals Modification of water application uniformity among closed circuit trickle irrigation systems

2010 ◽  
Vol 01 (01) ◽  
pp. 1-9 ◽  
Author(s):  
Hani A.-G. Mansour ◽  
Mohamed Yousif Tayel ◽  
Mohamed A. Abd El-Hady ◽  
David A. Lightfoot ◽  
Abdel-Ghany Mohamed El-Gindy
Keyword(s):  
Closed Circuit ◽  
Water Application ◽  
Trickle Irrigation ◽  
Irrigation Systems

Soil moisture distribution under trickle irrigation: a review

2020 ◽  
Vol 20 (3) ◽  
pp. 761-772 ◽  
Author(s):  
Arpna Bajpai ◽  
Arun Kaushal
Keyword(s):  
Soil Moisture ◽  
Drip Irrigation ◽  
Moisture Distribution ◽  
Soil Conditions ◽  
Initial Water Content ◽  
Water Application ◽  
Trickle Irrigation ◽  
Irrigation Systems ◽  
Application Rates ◽  
Soil Moisture Distribution

Abstract The wetting pattern of soil under trickle (drip) irrigation is governed by soil texture, structure, initial water content, emitter spacing, discharge rate and irrigation frequency. For efficient management of trickle irrigation moisture distribution plays an important role. The degree of soil wetted volume in an irrigation system determines the amount of water required to wet the root zone. This article helps in understanding moisture distribution for different lateral spacing, emitter spacing, emitter discharge rates and drip line installation depth for trickle irrigation under various soil conditions all over the world. This review reveals that soil moisture distribution and uniformity within the soil profile were affected by the distance between emitters rather than the distance between drip lines. In drip irrigation systems, the less the dripper spacing, the greater the moisture distribution as well as water use efficiency and crop yield. The radial spread of moisture was greater at lower water application rates, whereas the vertical spread was greater at higher water application rates. The vertical movement of soil moisture was greater than the horizontal movement under surface as well as subsurface drip irrigation systems. Deeper drip tape installations had a potential risk of not providing moisture to shallow rooted crops.

scholarly journals Salt Distribution in a Soil Irrigated by Subsurface Emitter

2020 ◽  
Vol 26 (8) ◽  
pp. 69-82
Author(s):  
Ali Raheem Waseen ◽  
Maysoon Basheer Abid
Keyword(s):  
Distribution Patterns ◽  
Application Rate ◽  
Water Application ◽  
Trickle Irrigation ◽  
Irrigation Systems ◽  
Water Losses ◽  
Transient Distribution ◽  
Numerical Result ◽  
Root Extraction ◽  
Salt Distribution

The best design of subsurface trickle irrigation systems requires knowledge of water and salt distribution patterns around the emitters that match the root extraction and minimize water losses. The transient distribution of water and salt in a two-dimensional homogeneous Iraqi soil domain under subsurface trickle irrigation with different settings of an emitter is investigated numerically using 2D-HYDRUS software. Three types of Iraqi soil were selected. The effect of altering different values of water application rate and initial soil water content was investigated in the developed model. The coefficient of correlation (R2) and the root-mean-square error (RMSE) was used to validate the predicted numerical result. This statistical analysis revealed that there was no much difference between the predicted numerical results, and the measured values. R2 varied from 0.75 to 0.93 and the (RMSE) from 0.079 to 0.116. The comparison confirms the accuracy of the developed model, and it shows that it can be used to simulate the front wetting patterns of water and salt distribution under subsurface trickle irrigation systems. The simulation outcome showed that as the distance from the emitter increased, soil salinity far from the emitter decreased. As expected, irrigation duration and amount affects the dimension of the solute distribution.

Simulation of Variable Water Application with Linear-move Irrigation Systems

1995 ◽  
Vol 38 (5) ◽  
pp. 1371-1376 ◽  
Author(s):  
C. W. Fraisse ◽  
D. F. Heermann ◽  
H. R. Duke
Keyword(s):  
Water Application ◽  
Irrigation Systems ◽  
Variable Water

scholarly journals COMPARISON OF ALTERNATIVE IRRIGATION SYSTEMS FOR CONTAINER NURSERY STOCK PRODUCTION

HortScience ◽  
1992 ◽  
Vol 27 (6) ◽  
pp. 602b-602
Author(s):  
James B. Calkins ◽  
Bert T. Swanson ◽  
Daniel G. Krueger ◽  
Karin R. Lundquist
Keyword(s):  
Plant Growth ◽  
Water Use ◽  
Sprinkler Irrigation ◽  
Trickle Irrigation ◽  
Irrigation Systems ◽  
Nursery Stock ◽  
Use Efficiency ◽  
Irrigation Treatments ◽  
And Performance ◽  
Production Areas

A study was designed to ascertain the efficacy, water use efficiency, runoff potential, and cost effectiveness of four container irrigation systems: overhead sprinkler irrigation, in-line trickle irrigation, capillary mat with leaky hose, and sub-irrigation. Results were species dependent. Plant growth was best under capillary mat and trickle irrigation treatments, however, differences in plant growth and performance between irrigation treatments were minimal. Differences in water use, however, were quite significant. Overhead irrigation was inefficient regarding water use while capillary mat and trickle systems used much lower volumes of water. Conservative irrigation systems which maintain acceptable plant growth using less water and reduce runoff from container production areas can clearly benefit growers by reducing production and environmental costs.

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