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首页> 外文期刊>Environmental research >Rainfall erosivity in Slovenia: Sensitivity estimation and trend detection
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Rainfall erosivity in Slovenia: Sensitivity estimation and trend detection

机译：斯洛文尼亚的降雨侵蚀力：敏感性估算和趋势检测

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摘要

Slovenia is one of the EU countries with the largest values and largest amounts of variability in rainfall erosivity, with maximum annual values exceeding 10,000 MJ mm ha(-1) h(-1) yr(-1). Five-minute rainfall data was analysed from 10 Slovenian rainfall stations with data-length availability longer than 25 years with a maximum data length of 69 years and a total data-station length equal to 443 years. Trends in the rainfall erosivity R-factor were detected for four different sub-samples using monthly, half-year, and annual rainfall erosivity values. The results indicate that rainfall erosivity trends for the selected Slovenian stations are mostly statistically insignificant, with the selected significance level of 0.05. However, a larger share of identified trends are positive than negative. The maximum annual rainfall erosivity values were obtained for one specific mountain station. Furthermore, a sensitivity analysis regarding the rainfall erosivity factor R calculation showed that the rainfall threshold parameter (12.7 mm) that is used to remove the small-magnitude rainfall events in order to reduce the computational burden can attribute up to 10% of the average annual R-values in cases where this threshold is not used. Other parameters have, on average, a smaller impact on the calculated rainfall erosivity. Furthermore, the application of local kinetic energy equations resulted in, on average, about 20% higher annual rainfall erosivity values compared to the equation that is proposed by the Revised Universal Soil Loss Equation (RUSLE) manual and was not developed specifically for this region.
机译：斯洛文尼亚是欧盟最大的国家之一，其降雨侵蚀力的变化最大，每年的最大值超过10,000 MJ mm ha（-1）h（-1）yr（-1）。分析了来自10个斯洛文尼亚降雨台站的五分钟降雨数据，这些数据站的数据长度超过25年，最大数据长度为69年，总数据站长度等于443年。使用月度，半年度和年度降雨侵蚀度值，针对四个不同的子样本检测了降雨侵蚀度R因子的趋势。结果表明，所选斯洛文尼亚站的降雨侵蚀力趋势在统计学上无明显意义，所选显着性水平为0.05。但是，在确定的趋势中，积极趋势多于消极趋势。获得了一个特定山区站的最大年降雨侵蚀力值。此外，对降雨侵蚀力因子R计算的敏感性分析表明，用于消除小幅度降雨事件以减轻计算负担的降雨阈值参数（12.7 mm）最多可占年均10％在不使用此阈值的情况下的R值。平均而言，其他参数对计算得出的降雨侵蚀力影响较小。此外，与修订的通用土壤流失方程（RUSLE）手册提出的方程式相比，局部动能方程式的应用平均导致年降雨侵蚀度值平均高出约20％，而该方程式并非专门针对该地区而开发。

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