Surface irrigation models should take two-dimensional infiltration of water in furrows into account for better representation and more accuracy. The Warrick–Lazarovitch infiltration model (W–L model) has been proposed to estimate the two-dimensional infiltration of water in furrow irrigation. This model consists of several parameters, including γ as an empirical parameter, which is often obtained through calibration of the model. This study aimed to evaluate the W–L model performance in determining the cumulative and lateral infiltrations under conventional furrow irrigation (CFI) and alternate furrow irrigation (AFI) schemes and two different initial and boundary conditions. The results indicate that the W–L model adequately estimated the cumulative and lateral infiltration, and the two-dimensional infiltration was estimated with less error than the lateral infiltration. In both irrigation schemes, for an increased surface boundary head from 5 to 10 cm and for a reduced initial water content from 0.21 to 0.16 cm³/cm³, the value of γ would increase. Generally, γ values in AFI were greater than those in CFI. The W–L model estimated the two-dimensional infiltration with more accuracy than the relative lateral infiltration for both CFI and AFI. Proper representation of infiltration is important in both irrigation management and in tracing footprints of chemicals used in agriculture.

中文翻译：

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常规和交替沟灌的显式渗透函数的现场评估

地表灌溉模型应考虑沟槽中水的二维渗透，以获得更好的代表性和更高的准确性。已提出 Warrick–Lazarovitch 渗透模型（W–L 模型）来估计沟灌中水的二维渗透。该模型由几个参数组成，包括γ作为经验参数，通常通过模型的校准获得。本研究旨在评估 W-L 模型在确定常规沟灌 (CFI) 和交替沟灌 (AFI) 方案以及两种不同的初始和边界条件下的累积和横向渗透方面的性能。结果表明，W-L 模型充分估计了累积和横向渗透，二维渗透的估计误差小于横向渗透。在两种灌溉方案中，如果地表边界水头从 5 厘米增加到 10 厘米，初始含水量从 0.21 减少到 0.16 厘米³ /厘米³，则γ的值会增加。一般来说，γAFI 中的值大于 CFI 中的值。W-L 模型估计二维渗透比 CFI 和 AFI 的相对横向渗透更准确。正确表示渗透对于灌溉管理和追踪农业中使用的化学品的足迹都很重要。