Modern analysis of surface irrigation systems with WinSRFR

Bautista, E.; Clemmens, A. J.; Strelkoff, Theodor; Schlegel, James L.

doi:10.1016/j.agwat.2009.03.007

Cited by 131 publications

(91 citation statements)

References 22 publications

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“…Table 4 compares parameters k and α for different soil texture and bulk densities; their estimated values based on Equations (18) and (19) are shown in Figure 10. The simulated values of k and α were in good agreement with almost all estimated values, indicating that the simplified model, Equation (20), is suitable for infiltration estimation for various soils with different D and ρ values. In addition, α was observed to be numerically stable at approximately 0.9; however, this requires further analysis.…”

Section: Effect Of Film Hole Diameter and Opening Ratio On Cumulativesupporting

confidence: 63%

Influencing Factors and Simplified Model of Film Hole Irrigation

Fan

Liu

2017

Water

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Film hole irrigation is an advanced low-cost and high-efficiency irrigation method, which can improve water conservation and water use efficiency. Given its various advantages and potential applications, we conducted a laboratory study to investigate the effects of soil texture, bulk density, initial soil moisture, irrigation depth, opening ratio (ρ), film hole diameter (D), and spacing on cumulative infiltration using SWMS-2D. We then proposed a simplified model based on the Kostiakov model for infiltration estimation. Error analyses indicated SWMS-2D to be suitable for infiltration simulation of film hole irrigation. Additional SWMS-2D-based investigations indicated that, for a certain soil, initial soil moisture and irrigation depth had the weakest effects on cumulative infiltration, whereas ρ and D had the strongest effects on cumulative infiltration. A simplified model with ρ and D was further established, and its use was then expanded to different soils. Verification based on seven soil types indicated that the established simplified double-factor model effectively estimates cumulative infiltration for film hole irrigation, with a small mean average error of 0.141-2.299 mm, a root mean square error of 0.177-2.722 mm, a percent bias of −2.131-1.479%, and a large Nash-Sutcliffe coefficient that is close to 1.0.

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Section: Effect Of Film Hole Diameter and Opening Ratio On Cumulativesupporting

confidence: 63%

Influencing Factors and Simplified Model of Film Hole Irrigation

Fan

Liu

2017

Water

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“…This program supplies performance contours that depict the variation of AE and DU min (among others) as a function of q and T co . These contour plots are generated by interpolation from simulation results computed at discrete grid points on a rectangular solution region, and the limits are defined by the user (Bautista et al, 2009a). These plots also present a dotted line representing the solutions that satisfy the irrigation requirement everywhere (i.e., minimum depth equals the required depth).…”

Section: Optimized Irrigation Managementmentioning

confidence: 99%

“…WinSRFR 3.1 (ALARC, 2009;Bautista et al, 2009a) is the software package used to determine these parameters and also to optimize them. For this optimization, the program compared DU min values, so this value was the uniformity parameter presented for the entire study.…”

Section: Field Evaluation Proceduresmentioning

confidence: 99%

“…Simulations with WinSRFR 3.1 were conducted to find the n values that minimized the difference between observed and simulated advance and recession times, which were used for analyzing the irrigation performance (Bautista et al, 2009a).…”

Section: Field Evaluation Proceduresmentioning

confidence: 99%

“…Two of the remarkable software are WinSRFR (ALARC, 2009;Bautista et al, 2009a), which was developed by the US Arid Land Agricultural Research Center, and SIRMOD (Walker, 2003), developed by Utah State University. Both are one-dimensional models and they are similar in many aspects; their accuracy has been tested in a wide range of conditions (McClymont et al, 1999).…”

Section: Introductionmentioning

confidence: 99%

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Furrow-irrigated chufa crops in Valencia (Spain). II: Performance analysis and optimization

Pascual-Seva¹,

Bautista²,

López-Galarza³

et al. 2013

Span. j. agric. res.

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Chufa (Cyperus esculentus L. var. sativus Boeck.) is a traditional crop in the Mediterranean region of Spain, where it is only furrow irrigated. This article analyzes the irrigation performance for this crop, conducting field studies over three consecutive seasons in Valencia (Spain). Irrigation schedule was based on the volumetric soil water content, which was measured with capacitance sensors. Infiltrability was measured with blocked-furrow infiltrometers. An area velocity flow module measured the water flow, the cross-sectional geometry of furrows was determined using furrow profilometers, and times for advance and recession were recorded. WinSRFR software was used to analyze every irrigation event, determining the application efficiency (AE) and distribution uniformity of the minimum (DU min ), and to optimize the combination of furrow inflow (q) and cut-off time (T co ). Average values obtained for AE were 30. 1%, 25.6%, and 26.7% in 2007, 2008, and 2009, respectively, and the corresponding DU min values were 0.54, 0.61, and 0.67. Optimized results showed that it is possible to reach AE and DU min values up to 87% and 0.86, respectively. However, understanding the q-T co relationship that maximizes both AE and DU min is more important than knowing the specific values. A function that related q and T co was obtained for the typical plot dimensions, and this was validated in 2011. Therefore, this function can be used in most of the plots in the cultivation area.Additional key words: application efficiency; cut-off time; distribution uniformity; furrow inflow rate; irrigation management; vegetable crop. * Corresponding author: bpascual@prv.upv.es Received: 31-07-12. Accepted: 09-01-13.Abbreviations used: AE (application efficiencies); D app (average depth of the water applied to the field); D av (average depth of the water infiltrated to the field); D min (minimum depth of the water applied to the field); D req (average depth of the water required to fill the root zone); DOY (day of the year); DU (distribution uniformity); DU min (distribution uniformity of the minimum); EY (experimental year); FC (field capacity); n (roughness coefficient); Q (water flow); q (furrow inflow); RP (refill point); T co (cut-off time); VSWC (volumetric soil water content.

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Evaluation of Fertigation in Different Soils and Furrow Irrigation Regimes

Abbasi

Rezaee

Jolaini

et al. 2012

Irrigation and Drainage

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The application of plant nutrients with irrigation water (fertigation) is a cost‐effective and efficient method for fertilizer application to enhance crop production and reduce potential environmental problems in comparison to conventional methods. In this study, the distribution uniformity of fertigation and fertilizer losses through runoff and deep percolation were evaluated at field scale in different furrow irrigation regimes and soils. A numerical fertigation model was calibrated and validated. Experiments were carried out in three soil textures and potassium nitrate was injected during the first half of the irrigation (FH), in the second half (SH) and during the entire irrigation event (T). These options were conducted under free‐draining and blocked‐end conditions with a cutback method. The distribution uniformities of low half (DULH) and low quarter (DULQ) of water and fertilizer were calculated to evaluate different fertigation scenarios. There were no significant differences among distribution uniformities in the three fertilizer application treatments (FH, SH, T). However, injection in the first half and during the entire irrigation event was better in terms of distribution uniformity and infiltrated fertilizer. The best case in blocked‐end conditions was injection in the second half of the irrigation event, preferably starting before completion of the advanced phase. In this case, fertilizer losses due to runoff from the outlet were zero and distribution uniformity was somewhat higher, whereas in free‐drainage conditions, fertilizer application during the first half of the irrigation provided acceptable fertilizer uniformity and lower fertilizer losses due to runoff. No significant difference was observed between the distribution uniformity of free‐drainage and blocked‐end experiments. A fertigation model was applied to the experimental data and the results showed good agreement with the field data. Measurements also showed that water and fertilizer losses due to deep percolation in fertigation was not a concern when proper irrigation parameters were selected, such as inflow rate. Copyright © 2012 John Wiley & Sons, Ltd.

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Modern analysis of surface irrigation systems with WinSRFR

Cited by 131 publications

References 22 publications

Influencing Factors and Simplified Model of Film Hole Irrigation

Influencing Factors and Simplified Model of Film Hole Irrigation

Furrow-irrigated chufa crops in Valencia (Spain). II: Performance analysis and optimization

Evaluation of Fertigation in Different Soils and Furrow Irrigation Regimes

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