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Temporal properties of rainfall events in Calabria (southern Italy)

机译：卡拉布里亚（意大利南部）降雨事件的时间特性

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摘要

Temporal properties of 152 575 rainfall events, recorded at time steps of 5 min, having different durations and occurring between 1989 and 2008 at 155 localities of Calabria (Italy), have been analysed in this paper. Samples from 45 533 storms have been selected to classify rainfall events as "significant" with regard to their contribution to soil erosion, flooding and/or other geo-hydrological processes. The samples are representative of a wide variety of situations in terms of duration, total rainfall, intensity, etc. The use of standardized rainfall profiles (SRP) is proposed to describe the within-storm temporal pattern. The main attraction of this method lies in the fact that it is based on actual data of regional precipitation. Its weak point is that large samples of data are required to obtain regional profiles. The research necessities for improving the use of Huff curves for storm disaggregation and its the potential use are summarized in this paper on the basis of the specific literature. A new criterion - based on the comparison of the areas A_1, A_2, A_3 and A_4 that underlie the four 25% of durations of a given SRP, and the corresponding four values of the "uniform" SRP (USRP), is suggested here with the aim of improving the use of the information content of SRP. Some interesting results concerning the sample frequency and the characterization of parameters for hydrological applications are commented on. The study conducted so far has produced important, albeit preliminary, results for different contexts of Calabria concerning the use of SRP among the methods for constructing design storm hyetographs.
机译：本文分析了152 575次降雨事件的时间特征，这些事件以5分钟的时间步长记录，持续时间不同，发生在1989年至2008年之间，发生在卡拉布里亚（意大利）的155个地区。就降雨事件对土壤侵蚀，洪水和/或其他地理水文过程的贡献而言，已选择了45 533次风暴的样本，将降雨事件归类为“重大”事件。这些样本在持续时间，总降雨，强度等方面代表了各种各样的情况。建议使用标准化降雨剖面（SRP）来描述暴风雨内的时间模式。这种方法的主要吸引力在于它基于区域降水的实际数据。它的弱点是需要大量数据样本才能获得区域概况。本文在具体文献的基础上，总结了改进霍夫曲线用于风暴分解的研究必要性及其潜在用途。在此建议一个新的标准-基于对给定SRP持续时间的四个25％持续时间下面的区域A_1，A_2，A_3和A_4的比较，以及“统一” SRP（USRP）的四个对应值。目的是改善对SRP信息内容的使用。评论了一些有关采样频率和水文应用参数表征的有趣结果。到目前为止，针对卡拉布里亚地区在使用SRP的设计方法中，关于SRP的使用，不同的背景产生了重要的结果，尽管是初步的。

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