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A method to employ the spatial organization of catchments into semi-distributed rainfall–runoff models

机译：一种将流域空间组织应用于半分布式降雨-径流模型的方法

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A distributed or semi-distributed deterministic hydrological model should consider the hydrologically most relevant catchment characteristics. These are heterogeneously distributed within a watershed but often interrelated and subject to a certain spatial organization which results in archetypes of combined characteristics. In order to reproduce the natural rainfall–runoff response the reduction of variance of catchment properties as well as the incorporation of the spatial organization of the catchment are desirable. In this study the width-function approach is utilized as a basic characteristic to analyse the succession of catchment characteristics. By applying this technique we were able to assess the context of catchment properties like soil or topology along the streamflow length and the network geomorphology, giving indications of the spatial organization of a catchment. Moreover, this information and this technique have been implemented in an algorithm for automated sub-basin ascertainment, which included the definition of zones within the newly defined sub-basins. The objective was to provide sub-basins that were less heterogeneous than common separation schemes. The algorithm was applied to two parameters characterizing the topology and soil of four mid-European watersheds. Resulting partitions indicated a wide range of applicability for the method and the algorithm. Additionally, the intersection of derived zones for different catchment characteristics could give insights into sub-basin similarities. Finally, a HBVsub96/sub case study demonstrated the potential benefits of modelling with the new subdivision technique.
机译：分布式或半分布式确定性水文模型应考虑水文最相关的流域特征。它们在流域内异质分布，但经常相互关联，并受某种空间组织的影响，从而形成了综合特征的原型。为了重现自然的降雨－径流响应，需要减少流域特性的方差以及纳入流域的空间组织。在这项研究中，宽度函数法被用作分析流域特征演替的基本特征。通过应用该技术，我们能够评估沿河流长度和网络地貌的流域属性（如土壤或拓扑）的背景，从而指示流域的空间组织。此外，此信息和此技术已在用于自动确定子盆地的算法中实现，该算法包括在新定义的子盆地内定义区域。目的是提供比常规分离方案异质性较低的子流域。将该算法应用于表征四个欧洲中部流域的地形和土壤的两个参数。结果分区表明该方法和算法具有广泛的适用性。此外，针对不同集水区特征的导出区域的交集可以深入了解子流域的相似性。最后，HBV 96 案例研究证明了使用新细分技术进行建模的潜在好处。

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