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首页> 外文期刊>Irrigation Science >Accounting for temporal inflow variation in the inverse solution for infiltration in surface irrigation
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Accounting for temporal inflow variation in the inverse solution for infiltration in surface irrigation

机译：考虑表层灌溉入渗逆解中的瞬时入流变化

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摘要

A simple modification of the volume balance equation of the IPARM model is presented to facilitate the use of variable inflow. Traditional approaches for estimating infiltration from advance and/or runoff have merely considered the constant or step inflow case. Whenever this assumption is violated, significant uncertainty is introduced into the estimated infiltration parameters. Evaluation of the procedure with a number of data sets has demonstrated significant improvements in the estimates of infiltration parameters. Furthermore, the technique has shown that a portion of the apparent variability in estimated soil intake rates between furrows in the same field is a consequence of the constant inflow assumption. Accounting for the variable inflow to estimate infiltration functions, both standardised the shape of the infiltration curve and reduced the magnitude of the variation between curves. The proposed technique remains restricted by limitations similar to that of other volume balance models but offers greater performance under typical inflow variations often experienced in practice.
机译：提出了对IPARM模型的体积平衡方程式的简单修改，以促进变量流入的使用。用于估计来自进水和/或径流的入渗的传统方法仅考虑了恒定或逐步流入的情况。只要违反了这一假设，就会将很大的不确定性引入估计的渗透参数中。利用许多数据集对该程序进行评估已显示出渗透参数估计值的显着改善。此外，该技术已经表明，同一田间犁沟之间的土壤吸收速率的估计表观变异性的一部分是恒定流入假设的结果。考虑到变量入流以估算入渗函数，既可以使入渗曲线的形状标准化，也可以减小曲线之间变化的幅度。所提出的技术仍然受到与其他体积平衡模型相似的局限性的限制，但是在实践中经常遇到的典型流入量变化下提供了更高的性能。

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  • 来源
    《Irrigation Science》 |2007年第2期|87-97|共11页
  • 作者

    M. H. Gillies; R. J. Smith; S. R. Raine;

  • 作者单位

    National Centre for Engineering in Agriculture and Cooperative Research Centre for Irrigation Futures University of Southern Queensland Toowoomba QLD 4350 Australia;

    National Centre for Engineering in Agriculture and Cooperative Research Centre for Irrigation Futures University of Southern Queensland Toowoomba QLD 4350 Australia;

    National Centre for Engineering in Agriculture and Cooperative Research Centre for Irrigation Futures University of Southern Queensland Toowoomba QLD 4350 Australia;

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