Do we still need the Rational Formula? An alternative empirical procedure for peak discharge estimation in small and ungauged basins
Do we still need the Rational Formula? An alternative empirical procedure for peak discharge estimation in small and ungauged basins
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DOI：
10.1080/02626667.2014.880546
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发表时间：
2015-01-01
期刊：
影响因子：
--
通讯作者：
Petroselli, Andrea
中科院分区：
文献类型：
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作者：
Grimaldi, Salvatore;Petroselli, Andrea
有理公式因其简单性和理论与数据有效性之间的有效折衷而成为实际水文中应用最广泛的公式。虽然有理公式有几个缺点，但考虑到输入信息的缺乏，它是可靠的，并且令人惊讶地准确。然而，经过一个多世纪，在计算能力，理论和大规模监测的最新进展迫使我们试图提出一个更先进的，但仍然是经验的小流域和无资料流域的峰值流量估计程序。在本文中，一个替代的经验程序的描述和讨论，然后讨论是否合理的公式仍然是必要的。所提出的方法集成了三个标准步骤的共同事件为基础的方法（设计雨型线，降雨过量和降雨径流转换）准确地适应应用缺乏观测数据。建议的程序需要相同的输入信息，为应用合理的公式（土壤特性，强度-持续时间-频率降雨曲线和T-C），并提供了峰值流量和设计过程线形状，最重要的是，减少了水文学家在其应用中的主观性。[图片]编辑D.库措伊亚尼斯
The Rational Formula is the most applied equation in practical hydrology due to its simplicity and the effective compromise between theory and data availability. Although the Rational Formula has several drawbacks, it is reliable and surprisingly accurate considering the paucity of input information. However, after more than a century, the recent progress in computational ability, theory and large-scale monitoring compel us to try to suggest a more advanced yet still empirical procedure for estimating peak discharge in small and ungauged basins. In this paper, an alternative empirical procedure is described and discussed, and then a discussion as to whether the Rational Formula is still necessary is presented. The presented methodology integrates the three standard steps of the common event-based approach (design hyetograph, rainfall excess and rainfall-runoff transformation) accurately adapted for application with a lack of observed data. The proposed procedure requires the same input information as necessary for application of the Rational Formula (soil properties, intensity-duration-frequency rainfall curves and T-c) and provides both the peak discharge and the design hydrograph shape and, most importantly, reduces the subjectivity of the hydrologist in its application.[GRAPHICS]Editor D. Koutsoyiannis