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首页> 外文期刊>Catena: An Interdisciplinary Journal of Soil Science Hydrology-Geomorphology Focusing on Geoecology and Landscape Evolution >Three geomorphological rainfall-runoff models based on the linear reservoir concept
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Three geomorphological rainfall-runoff models based on the linear reservoir concept

机译：基于线性水库概念的三种地貌降雨径流模型

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Three geomorphological models, based on linear reservoirs cascade, are developed; two of the models are unit hydrograph (UH) models and one contains a non-linear routing approach. In the first UH model, each sub-basin is represented as a cascade of equal linear reservoirs (Nash's model) which directly discharges to the watershed outlet through a linear channel. In the second UH model each sub-basin is represented as a linear reservoir arranged in a sequence based on the drainage network. For both unit hydrograph models, parameters are explicitly derived, which make the models simple and applicable for real world problems. In the third model, output hydrographs of the sub-basins are calculated by the Nash model but with consideration of geomorphological properties of the sub-basins. Then, the obtained hydrographs are routed through the main channel using a non-linear kinematic wave model. Combination of the kinematic wave routing model (a non-linear routing model) and the Nash model (a linear lumped model) makes this third model more appropriate for runoff modeling.Two important properties of these three models are that they consider the effect of watershed geomorphology and include only one parameter which can be estimated using observed rainfall-runoff data. GIS tools are used for determining the watershed geomorphological parameters. The results of these models are compared with the Nash's black box and the geomorphological SCS models for the Amameh watershed, Iran. Although the results show that the proposed models yield good efficiency in rainfall-runoff modeling, the semi-distributed routing ability in the second and third models produces better results. (c) 2008 Elsevier B.V. All rights reserved.
机译：建立了基于线性储层级联的三种地貌模型。其中两个模型是单位水位（UH）模型，一个包含非线性路由方法。在第一个UH模型中，每个子流域均表示为级联的等线性蓄水池（纳什模型），这些蓄水池通过线性通道直接排放到集水区出口。在第二个UH模型中，每个子流域都表示为一个线性水库，该水库基于排水网络按顺序排列。对于这两种单位水文模型，都明确导出了参数，这使模型变得简单且适用于实际问题。在第三个模型中，通过Nash模型计算子流域的输出水文图，但要考虑到子流域的地貌特征。然后，使用非线性运动波模型将获得的水文图路由通过主通道。运动波路由模型（非线性路由模型）和Nash模型（线性集总模型）的结合使第三个模型更适合于径流建模。这三个模型的两个重要特性是它们考虑了分水岭的影响地貌学，仅包含一个参数，可以使用观测到的降雨径流数据进行估算。 GIS工具用于确定流域地貌参数。将这些模型的结果与Nash的黑匣子和伊朗Amameh流域的地貌SCS模型进行了比较。尽管结果表明所提出的模型在降雨径流建模中具有良好的效率，但是第二种和第三种模型的半分布式路由能力却产生了更好的结果。 （c）2008 Elsevier B.V.保留所有权利。

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