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

Laboratory Evaluation of Variable Water Application with Pulse Irrigation

1995 ◽  
Vol 38 (5) ◽  
pp. 1363-1369 ◽  
Author(s):  
C. W. Fraisse ◽  
H. R. Duke ◽  
D. F. Heerman
Keyword(s):  
Laboratory Evaluation ◽  
Water Application ◽  
Variable Water

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

scholarly journals A simplified method to improve water distribution and application uniformity for sprinkler irrigation on sloping land: adjustment of riser orientation

2020 ◽  
Author(s):  
Xin Hui ◽  
Haijun Yan ◽  
Lin Zhang ◽  
Junying Chen
Keyword(s):  
Soil Erosion ◽  
Water Distribution ◽  
Sprinkler Irrigation ◽  
Water Application ◽  
Irrigation Systems ◽  
Irrigation Projects ◽  
Irrigation Uniformity ◽  
Simplified Method ◽  
Investment Cost ◽  
Sloping Land

Abstract To improve the water application uniformity for sprinkler irrigation on sloping land, indoor tests were conducted on an artificial slope (slopes of 0, 0.05, 0.10 and 0.15) to evaluate the effects of two riser orientations, vertical (VO) and perpendicular (PO) to the slope, on the uniformity of sprinkler rotation, radius of throw, water distribution of an individual sprinkler and the overlapped water application uniformity (WAU). Compared with the VO, the PO could effectively improve the water distribution on sloping land and minimize the risk of soil erosion. Additionally, the PO was superior in the WAU, and a rectangular arrangement could dramatically enhance the WAU at smaller sprinkler spacing, while larger acceptable sprinkler spacing was accepted in a triangular arrangement. The riser orientation and sprinkler spacing had the most significant effect on the WAU, followed by the slope and sprinkler arrangement, suggesting that the adjustment of riser orientation or sprinkler spacing was helpful in improving the WAU. However, from the aspects of investment cost and installation convenience for irrigation projects, the method of PO was recommended. Therefore, when designing the sprinkler irrigation systems on the slope, choosing PO is the simplest and most effective way to achieve good irrigation uniformity.

scholarly journals Economic viability of retrofiting emitters in center pivot irrigation systems

2012 ◽  
Vol 32 (3) ◽  
pp. 602-608 ◽  
Author(s):  
Cornélio A. Zolin ◽  
Rubens D. Coelho ◽  
Janaina Paulino ◽  
Marcos V. Folegatti
Keyword(s):  
Decision Making ◽  
Irrigation System ◽  
Potato Crop ◽  
Economic Viability ◽  
Water Application ◽  
Economic Perspective ◽  
Sale Price ◽  
Irrigation Systems ◽  
Uniformity Coefficient ◽  
Center Pivot

Although several studies have been conducted to evaluate the uniformity of water application under center pivot irrigation systems, there are few studies concerning the economic perspective of such coefficient. The aim of this study is to present a methodology to accomplish an economic analysis as support for the decision-making to retrofit emitters in center pivot irrigation systems, and to attribute an economic meaning to the uniformity coefficient of water application taking into account the response function productivity to the amount of water applied and the sale price of the crops. In the hypothetic calculation example considering the variation of revenue of potato crop under center pivot irrigation system, it was verified that the area with uniformity coefficient of water application of 90% brought an income increase of BR$ 1,992.00, considering an area about 1,0 ha. Thus, it can be concluded that the methodology presented has met the objectives proposed in the study and made it possible to attribute an economical meaning to the coefficient of water uniformity application.

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.

Analysis of water application cost with permanent set sprinkler irrigation systems

2004 ◽  
Vol 23 (3) ◽  
pp. 103-110 ◽  
Author(s):  
J. Montero Mart�nez ◽  
R. S. Mart�nez ◽  
J. M. Tarjuelo Mart�n-Benito
Keyword(s):  
Sprinkler Irrigation ◽  
Water Application ◽  
Irrigation Systems ◽  
Permanent Set
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