Abstract The main objective of the paper was to propose and evaluate the performance of a regional approach to estimate CN values and to test the impact of different initial abstraction ratios. The curve number (CN) was analyzed for five Slovak and five Polish catchments situated in the Carpathian Mountains. The L-moment based method of Hosking and Wallis and the ANOVA test were combined to delineate the area in two homogenous regions of catchments with similar CN values. The optimization condition enabled the choice of the initial abstraction ratio, which provided the smallest discrepancy between the tabulated and estimated CNs and the antecedent runoff conditions. The homogeneity in the CN within the regions of four Slovak and four Polish catchments was revealed. Finally, the regional CN was proposed to be at the 50% quantile of the regional theoretical distribution function estimated from all the CNs in the region. The approach is applied in a group of Slovak and Polish catchments with physiographic conditions representative for the Carpathian region. The main benefit of introducing a common regional CN is the opportunity to apply this procedure in catchments of similar soil-physiographic characteristics and to verify the existing tabulated CN. The paper could give rise to an alternative way of estimating the CN values in forested catchments and catchments with a lack of data or without observations.

中文翻译：

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基于 L 矩的斯洛伐克和波兰喀尔巴阡流域曲线数的区域方法

摘要 本文的主要目的是提出并评估区域方法的性能，以估计 CN 值并测试不同初始提取率的影响。分析了位于喀尔巴阡山脉的五个斯洛伐克和五个波兰流域的曲线数 (CN)。基于 L 矩的 Hosking 和 Wallis 方法与方差分析测试相结合，以划定具有相似 CN 值的两个流域的同质区域的区域。优化条件允许选择初始取水率，这使得列表和估计的 CNs 与先前径流条件之间的差异最小。揭示了四个斯洛伐克和四个波兰流域内 CN 的同质性。最后，建议区域 CN 位于从该区域所有 CN 估计的区域理论分布函数的 50% 分位数。该方法应用于具有代表喀尔巴阡地区自然地理条件的一组斯洛伐克和波兰流域。引入通用区域 CN 的主要好处是有机会在具有相似土壤地貌特征的集水区应用此程序并验证现有的列表 CN。该论文可能会产生一种替代方法来估计森林集水区和缺乏数据或没有观察的集水区的 CN 值。引入通用区域 CN 的主要好处是有机会在具有相似土壤地貌特征的集水区应用此程序并验证现有的列表 CN。该论文可能会产生一种替代方法来估计森林集水区和缺乏数据或没有观察的集水区的 CN 值。引入通用区域 CN 的主要好处是有机会在具有相似土壤地貌特征的集水区应用此程序并验证现有的列表 CN。该论文可能会产生一种替代方法来估计森林集水区和缺乏数据或没有观察的集水区的 CN 值。