Using stable water isotopes to assess the influence of irrigation structural configurations on evaporation losses in semiarid agricultural systems

Al-Oqaili, Firas; Good, Stephen P.; Peters, R. Troy; Finkenbiner, Catherine; Sarwar, Abid

doi:10.1016/j.agrformet.2020.108083

Cited by 23 publications

(19 citation statements)

References 38 publications

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“…In past 20 years of Shiyang River Basin, irrigated area has increased 30%, and irrigation water accounts for 94.7% of the total agricultural, industrial and domestic water use (Niu et al, 2013). The main irrigation method of crops in the study area is flood irrigation, which is extremely unreasonable and will cause a large amount of water loss due to evaporation (Al‐Oqaili et al, 2020) point out that compared to the spray systems, flood irrigation have higher non‐productive water losses and will significantly reduce the efficiency of water use. In short, the increase in water area and irrigated area will undoubtedly resulted in an increase in annual evaporation in the Shiyang River Basin.…”

Section: Discussionmentioning

confidence: 99%

Identifying surface water evaporation loss of inland river basin based on evaporation enrichment model

Sun

Zhu

Zhang

et al. 2021

Hydrological Processes

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Accurately quantifying the evaporation loss of surface water is essential for regional water resources management, especially in arid and semi-arid areas where water resources are already scarce. The long-term monitoring of stable isotopes (δ 18 O and δ 2 H) in water can provide a sensitive indicator of water loss by evaporation. In this study, we obtained surface water samples of Shiyang River Basin from April to October between 2017 and 2019. The spatial and temporal characteristics of stable isotopes in surface water show the trend of enrichment in summer, depletion in spring, enrichment in deserts and depletion in mountains. The Local Evaporation Line (LEL) obtained by the regression of δ 2 H and δ 18 O in surface water has been defined by the lines: δ 2 H = 7.61δ 18 O + 14.58 for mountainous area, δ 2 H = 4.19δ 18 O − 17.85 for oasis area, δ 2 H = 4.08δ 18 O − 18.92 for desert area. The slope of LEL shows a gradual decrease from mountain to desert, indicating that the evaporation of surface water is gradually increasing. The evaporation loss of stable isotopes in surface water is 24.82% for mountainous area, 32.19% for oasis area, and 70.98% for desert area, respectively. Temperature and air humidity are the main meteorological factors affecting the evaporation loss, and the construction of reservoirs and farmland irrigation are the main man-made factors affecting the evaporation loss.

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Section: Discussionmentioning

confidence: 99%

Identifying surface water evaporation loss of inland river basin based on evaporation enrichment model

Sun

Zhu

Zhang

et al. 2021

Hydrological Processes

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“…After Al‐Oqaili et al. (2020), a linear mixed effects model (LMEM) was applied to evaluate the relationship between irrigation location and timing with the soil moisture and its isotopic composition. Higher similarities of soil samples that were collected during the same month from three different depths at a single core, as well as similarities between numerous cores collected at the same location or field, result in hierarchically nested samples that can be controlled for within LMEMs (Barlow, Jashami, Sova, Hurwitz, & Olsen, 2019; Jashami, Hurwitz, Monsere, & Kothuri, 2019).…”

Section: Methodsmentioning

confidence: 99%

“…Overall, it remains unanswered how transpiration and evaporation vary between row and interrow positions. Stable isotopes ( 2 H and 18 O) in soil water are a sensitive indicator of water loss by evaporation because evaporation enriches soil water in heavy isotopes while root water uptake and subsurface leakage do not (Al-Oqaili, Good, Peters, Finkenbiner, & Sarwar, 2020;Soderberg, Good, Wang, & Caylor, 2012;Wang et al, 2012). This property has propelled stable isotopes to be an established method for soil water flux monitoring (Busari et al, 2013) and the partitioning of moisture losses (Al-Oqaili et al, 2020).…”

Section: Core Ideasmentioning

confidence: 99%

“…Recently, Al‐Oqaili et al. (2020) were able to demonstrate differences in stable isotope ratios as a result of changes in sprinkler irrigation structural configurations.…”

Section: Introductionmentioning

confidence: 99%

“…Stable isotopes ( 2 H and 18 O) in soil water are a sensitive indicator of water loss by evaporation because evaporation enriches soil water in heavy isotopes while root water uptake and subsurface leakage do not (Al‐Oqaili, Good, Peters, Finkenbiner, & Sarwar, 2020; Soderberg, Good, Wang, & Caylor, 2012; Wang et al., 2012). This property has propelled stable isotopes to be an established method for soil water flux monitoring (Busari et al., 2013) and the partitioning of moisture losses (Al‐Oqaili et al., 2020). Van den Akker, Simmons, and Hutson (2011) found differences in isotope enrichment among irrigation bays due to evaporation losses driving isotope enrichment within the local pan at different stages of irrigation.…”

Section: Introductionmentioning

confidence: 99%

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Differences in soil evaporation between row and interrow positions in furrowed agricultural fields

Al-Oqaili

Good

Frost

et al. 2020

Vadose Zone Journal

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Although large‐scale center pivot sprinkler irrigation has replaced surface irrigation in many locations, the agricultural practice of growing crops in furrows remains common. Still, how the presence of elevated soil rows under sprinkler irrigation influences evaporation losses remains unclear, even while quantifying nonproductive water losses becomes increasingly important for informing new water conservation and irrigation strategies. In this study at the Hermiston Agricultural Research and Extension Center in Hermiston, OR, soil evaporation from the row and interrow positions within potato (Solanum tuberosum L.) fields of contrasting irrigation timing (daytime vs. nighttime) was estimated based on hydrogen and oxygen isotope ratios. Samples collected throughout the 2016 growing season were analyzed and used to calculate soil evaporation (E) losses relative to applied irrigation (I). On average, row positions were more enriched in heavy isotopes than interrow positions, indicating that the evaporated fraction of applied irrigation (E/I) depends on the position. Within the day‐irrigated field, the estimated (mean ± standard deviation) E/I ratios determined from both stable isotopes for May, July, and September were 18 ± 8%, 10 ± 3%, and 19 ± 5% for row and 15 ± 6%, 7 ± 2%, and 12 ± 4% for interrow samples. Within the night‐irrigated field during these same months, the E/I ratios were 13 ± 12%, 16 ± 7%, and 13 ± 5% for row and 12 ± 7%, 9 ± 2%, and 6 ± 2% for interrow samples, respectively. For these fields, these results reveal that there is more evaporation from row, as compared with interrow, positions. Therefore, management practices for water conservation should account for larger nonproductive evaporation from within rows in order to minimize evaporative losses.

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Soil moisture variability affected by sand mulch: An isotope‐based assessment of irrigated farmland in Northwest China

et al. 2022

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As a practical agricultural technique in Northwest China, the sand mulch reduces the soil moisture loss of irrigated farmland under an arid setting. To understand the soil moisture variability affected by sand mulch, we selected an irrigated orchard of peach (Amygdalus persica L.) in Northwest China and examined the soil moisture movement conditioned by irrigation using a stable water isotope method. Based on the isotopic variability of continuously collected soil, plant, and irrigation water samples, the infiltration and evaporation of soil moisture were assessed. The results showed that (1) during the sampling period, the average soil water content and infiltration volume of the sand mulch plot were 1.63% and 6.82%, respectively, which are higher than those of the uncovered plot, indicating a better soil water retention after sand mulch. (2) The slope of the evaporation line of the sand mulch plot (4.79) was greater than that of the uncovered plot (4.11), and the average evaporation loss of the sand mulch plot (0–30 cm) was 10.29% lower than that of the uncovered plot. The average evaporation rate of the sand mulch plot was 5.02% per day, which is lower than that of the uncovered plot 8.41% per day. The isotope‐based evidence shows that sand mulch effectively reduces soil water evaporation, which provides a theoretical basis for agricultural water management and optimization of water‐saving methods for arid land.

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Using stable water isotopes to assess the influence of irrigation structural configurations on evaporation losses in semiarid agricultural systems

Cited by 23 publications

References 38 publications

Identifying surface water evaporation loss of inland river basin based on evaporation enrichment model

Identifying surface water evaporation loss of inland river basin based on evaporation enrichment model

Differences in soil evaporation between row and interrow positions in furrowed agricultural fields

Soil moisture variability affected by sand mulch: An isotope‐based assessment of irrigated farmland in Northwest China

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