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首页> 外文期刊>Hydrological Processes >Multi-site calibration using a grid-based event rainfall-runoff model: a case study of the upstream areas of the Nakdong River basin in Korea
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Multi-site calibration using a grid-based event rainfall-runoff model: a case study of the upstream areas of the Nakdong River basin in Korea

机译：使用基于网格的活动降雨 - 径流模型的多站点校准：韩国中龙河流域上游地区的案例研究

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摘要

Most runoff analyses using a grid-based distributed model use one parameter group calibrated at the outlet of a watershed, instead of dividing the watershed into subwatersheds. Significant differences between the observed value and the simulation result of the subwatersheds can occur if just one parameter group is used in all subwatersheds that have different hydrological characteristics from each other. Therefore, to improve the simulation results of the subwatersheds within a watershed, a model calibrated at every subwatershed needs to be used to reflect the characteristics of each subwatershed. In this study, different parameter groups were set up for one or two sites using a distributed model, the GRM (Grid based Rainfall-runoff Model), and the evaluations were based on the results of rainfall-runoff analysis, which uses a multi-site calibration (MSC) technique to calibrate the model at the outlet of each site. The Hyangseok watershed in Naeseong River, which is a tributary of Nakdong River in Korea, was chosen as the study area. The watershed was divided into five subwatersheds each with a subwatershed outlet that was applied to the calibration sites. The MSC was applied for five cases. When a site was added for calibration in a watershed, the runoff simulation showed better results than the calibration of only one site at the most downstream area of the watershed. The MSC approach could improve the simulation results on the calibrated sites and even on the non-calibrated sites, and the effect of MSC was improved when the calibrated site was closer to the runoff site. Copyright (c) 2014 John Wiley & Sons, Ltd.
机译：大多数径流分析使用基于网格的分布式模型使用一个参数组在流域的出口处校准，而不是将流域划分为副过程。如果只有一个参数组用于彼此不同的水文特征的所有水学特征，则可能会发生观察到的值与子流域的模拟结果之间的显着差异。因此，为了改善流域内的亚流域的仿真结果，需要使用在每个副过程中校准的模型来反映每个副过程的特征。在本研究中，使用分布式模型，GRM（基于网格的降雨 - 径流模型）为一个或两个站点设置了不同的参数组，评估基于降雨径流分析的结果，它使用多个站点校准（MSC）技术在每个站点的出口处校准模型。在纳西松河的Hyangseok流域，是韩国中山东河的支流，被选为研究区。分流物分为五个副分为五个副分裂，每个次曲面都有一个涂抹于校准点的副出口。 MSC应用于五种情况。当在流域中添加站点进行校准时，径流模拟显示出比在流域的最下游区域的一个网站的校准更好的结果。 MSC方法可以改善校准位点上的仿真结果，甚至在非校准点上，当校准场地更接近径向网站时，MSC的效果得到改善。版权所有（c）2014 John Wiley＆Sons，Ltd。

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