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Investigating the midpoint of a two-point method for predicting advance and infiltration in surface irrigation*
Irrigation and Drainage ( IF 1.6 ) Pub Date : 2021-06-09 , DOI: 10.1002/ird.2618
Amir Panahi 1 , Amin Seyedzadeh 1 , Eisa Maroufpoor 2
Affiliation  

This study used the location of the average advance time (method 1) and the mean infiltration opportunity time (method 2) as the midpoint of the two-point method for determining “power advance” and Kostiakov–Lewis infiltration parameters. Experiments were carried out in three border-irrigated fields. The results showed that calibration of the power advance equation obtained by the Elliot and Walker method had high accuracy, with an average relative error of 11.3% in the time to complete the advance phase. The root mean square deviation (dRMS) index used by Elliot and Walker showed that method 1, with an average dRMS value of 15.7 min, has the lowest dRMS, which estimates the advance time with mean dRMS values of 5.1 and 1.8 min less than the proposed method 2 and the method of Elliot and Walker, respectively. Furthermore, using all methods, the Kostiakov–Lewis infiltration equation parameters were determined. In estimating infiltration depth, method 1 had the highest accuracy with a minimum relative error of 0%, a maximum relative error of 8.7%, and an average relative error of 3.8%. Based on both the dRMS index and the accuracy of the infiltration equation, method 1 had a higher accuracy.

中文翻译:

研究用于预测地表灌溉推进和入渗的两点法的中​​点*

本研究使用平均提前时间(方法 1)和平均渗透机会时间(方法 2)的位置作为确定“功率提前”和 Kostiakov-Lewis 渗透参数的两点法的中​​点。在三个边灌区进行了试验。结果表明,Elliot和Walker方法得到的功率超前方程的标定精度较高,在完成超前阶段的时间内平均相对误差为11.3%。Elliot 和 Walker 使用的均方根偏差 ( d RMS ) 指数表明,方法 1 的平均d RMS值为 15.7 分钟,具有最低的d RMS ,它用平均d估计提前时间RMS值分别比建议的方法 2 和 Elliot 和 Walker 的方法小 5.1 和 1.8 分钟。此外,使用所有方法,确定了 Kostiakov-Lewis 渗透方程参数。在估算入渗深度时,方法 1 的准确度最高,最小相对误差为 0%,最大相对误差为 8.7%,平均相对误差为 3.8%。基于d RMS指数和入渗方程的精度,方法1具有更高的精度。
更新日期:2021-06-09
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