Irrigation distribution uniformity analysis on a lateral-move irrigation system

Faria, Lessandro Coll; Nörenberg, Bernardo Gomes; Colombo, Alberto; Dukes, Michael D.; Timm, Luís Carlos; Beskow, Samuel; Caldeira, Tamara Leitzke

doi:10.1007/s00271-019-00619-5

Cited by 11 publications

(4 citation statements)

References 14 publications

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“…In the abovementioned CU–DU linear relationship, the slope coefficient represents the ratio between half of the difference ( S l /2) of the difference between the sprinkler water depth and the mean value of the sprinkler water amount at each radial point and the water deviation ( m ) of the low value of the N /4 sprinkler water amount and the mean value of the sprinkler water amount. Evidently, the value of the slope coefficient is related to the actual sprinkler water distribution characteristics of the sprinklers, and many factors, such as the sprinkler type, working pressure, combination spacing, wind speed and wind direction, affect the actual sprinkler water distribution characteristics of the sprinklers (Faria et al, 2019; Mateos, 1998; Wąsik et al, 2018), which also explains why the CU and DU relationship equations had different slope coefficients in previous studies. The plots of the linear regression relationship between DU and CU, as well as the deviation relationship between DU and CU by Seniwongse and Reynolds (1972), Keller and Bliesner (1990), Jiusheng et al (1998), among others, are shown in Figure 2, where the deviation relationship is expressed as the relative deviation rate

ζ

(Equation ), and the relative deviation explains the relative distance between the two and objectively describes the gap between them.…”

Section: Effect Of the Slope Coefficient On The Numerical Relationshi...mentioning

confidence: 98%

Sprinkler irrigation uniformity assessment: Relational analysis of Christiansen uniformity and Distribution uniformity

Xue

Wei

et al. 2023

Irrigation and Drainage

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Christiansen uniformity (CU) and Distribution uniformity (DU) are the most commonly used irrigation quality evaluation indicators, focusing on overall uniformity and local water deficit, respectively. Clarifying the quantitative relationship between the CU and DU has important production value for determining the water distribution characteristics of whole and localized areas in the evaluation of sprinkler irrigation water uniformity and improving the quality of sprinkler irrigation. This paper analyses the relationship between the calculation formulas of CU and DU based on mathematical analysis. The results reveal a prominent linear relationship between CU and DU, and the sum of the slope coefficient and the constant term of the linear relationship equation is 1. The value of the slope coefficient of the CU–DU linear relationship characterizes the differentiated form of the sprinkler water distribution. The slope coefficient is determined by the nozzle type, operating parameters and working scenarios. Notably, the specific form of the linear relationship obtained by fitting the experimental results in the literature is not universal. The mapping relationship between the value of the slope coefficient and the distribution form of sprinkler irrigation water quantity was established, and the influence of the value range of the slope coefficient on the DU of the overall and local sprinkler irrigation water quantity was demonstrated. The results show that the deviation rates of CU and DU decrease with increasing slope coefficient. When the slope coefficient is less than 1, CU is greater than DU; and the slope coefficient ranges from 0.46 to 1.36. When the slope coefficient is 0.625, the possibility of uniform irrigation is the highest. This research helps to overcome the limitations of CU and DU for irrigation uniformity evaluation and provides a reference for carrying out sprinkler irrigation uniformity evaluation with comprehensive characterization capabilities.

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ζ

(Equation ), and the relative deviation explains the relative distance between the two and objectively describes the gap between them.…”

Section: Effect Of the Slope Coefficient On The Numerical Relationshi...mentioning

confidence: 98%

Sprinkler irrigation uniformity assessment: Relational analysis of Christiansen uniformity and Distribution uniformity

Xue

Wei

et al. 2023

Irrigation and Drainage

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“…This indicates how evenly the water is distributed over the field. A high uniformity value implies that the applied water depth is similar across different parts of the field (Faria et al, 2019). The data in Table ( 5) displays the degrees of homogeneity for various irrigation techniques.…”

Section: Uniformity Coefficient Of Applied Watermentioning

confidence: 99%

Furrow irrigation design and evaluation for enhancing indices of water usage performance and productivity of canola crop in North Nile Delta soils

Khalifa,

Shabana,

EL-Ghannam

2024

EBSS

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IELD study carried out at Sakha farm in the Governorate of Kafr EL-Sheikh, Egypt during two winter seasons, aimed to optimize the furrow irrigation design and management for canola crop in soils at North Nile Delta, and to assessment its effects on the water usage performance, productivity, and profitability of the crop. The study investigated the effects of different furrow design, cut-off irrigation, alternate furrow irrigation, with irrigation discharge 4 Lps m -1 , and biomineral fertilization treatments on the characteristics of infiltration, intake family, and selected irrigation characters, along with post-irrigation performance. Also, conducted an economic evaluation of the treatments. The findings demonstrated that in both seasons, the infiltration rate dropped down quickly at 4 hours as time passed, and that for both alternate furrow irrigation and distinct cut-off irrigation, the applied water distribution uniformity was greater than 0.9. When the intake family shrank from 0.35 to 0.33, the application efficiency rose and was deemed suitable for a 2 lps/m furrow influx rate. There was a difference between the designed and measured irrigation time, advance time, and recession time. The designed irrigation time/advance time ratio was also greater than the observed values. Although the design was deemed acceptable on clay soil, the ratio of inflow time to advance time for the design parameters was greater than 2. The cut-off at 85% of the furrow length produced the highest ratio. The maximum irrigation application efficiency values were found when the design and measured parameters were cut off at 85% of the furrow length. In terms of the economic analysis, the interaction between I3 and F3 produced the highest values of net return and benefit-cost ratio. Additionally, it was discovered that I3 and I4 in conjunction with F3 and F4 produced the lowest specific cost values.

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“…The uniform distribution has been a useful tool for describing the distribution of some water-related elements such as irrigated water depth 39 and daily streamflow 40 . Given the rapid development of the agricultural industry and population growth, data for the first three years of the forecasted years were used for the historical data analysis.…”

Section: Proposed Frameworkmentioning

confidence: 99%

Water resources allocation considering water supply and demand uncertainties using newsvendor model-based framework

He,

Zheng,

Chen

et al. 2023

Sci Rep

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A novel newsvendor model-based framework for regional industrial water resources allocation that considers uncertainties in water supply and demand was proposed in this study. This framework generates optimal water allocation schemes while minimizing total costs. The total cost of water allocation consists of the allocated water cost, the opportunity loss for not meeting water demand, and the loss of the penalty for exceeding water demand. The uncertainties in water demand and supply are expressed by cumulative distribution functions. The optimal water allocation for each water use sector is determined by the water price, the unit loss of the penalty and opportunity loss, and the cumulative distribution functions. The model was then applied to monthly water allocation for domestic, industrial, and agricultural water use in two counties of Huizhou City, China, whose water supply mainly depends on Baipenzhu Reservoir. The water demand for each water use sector and the monthly reservoir inflow showed good fits with the uniform and P-III distributions, respectively. The water demand satisfied ratio for each water use sector was stable and increased for the optimal water allocation scheme from the newsvendor model-based framework, and the costs were lower compared with the actual water allocation scheme. The novel framework is characterized by less severe water shortages, lower costs, and greater similarity to actual water use compared with the traditional deterministic multi-objective analysis model, and demonstrates strong robustness in the advantages of lower released surplus water and higher water demand satisfied ratio. This novel framework yields the optimal water allocation for each water use sector by integrating the properties of the market (i.e., determining the opportunity loss for not meeting water demand) with the government (i.e., determining the water price and the loss of the penalty for exceeding water demand) under the strictest water resources management systems.

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Irrigation distribution uniformity analysis on a lateral-move irrigation system

Cited by 11 publications

References 14 publications

Sprinkler irrigation uniformity assessment: Relational analysis of Christiansen uniformity and Distribution uniformity

Sprinkler irrigation uniformity assessment: Relational analysis of Christiansen uniformity and Distribution uniformity

Furrow irrigation design and evaluation for enhancing indices of water usage performance and productivity of canola crop in North Nile Delta soils

Water resources allocation considering water supply and demand uncertainties using newsvendor model-based framework

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