Abstract. The Global Runoff Data Centre provides time series of observed discharges that are valuable for calibrating and validating the results of hydrological models. We address a common issue in large-scale hydrology that has not been satisfactorily solved, though investigated several times. To compare simulated and observed discharge, grid-based hydrological models must fit reported station locations to the resolution-dependent gridded river network. We introduce an Intersection over Union ratio approach to selected station locations on a coarser grid-scale, reducing the errors in assigning stations to the correct upstream basin. We update the 10-year-old database of watershed boundaries with additional stations based on a high-resolution (3 arc seconds) river network and provide source codes and high- and low-resolution watershed boundaries. The dataset is stored on Zenodo with the associated DOI https://doi.org/10.5281/zenodo.6906577.

中文翻译：

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使用 GRDC 测量站校准大型水文模型

摘要。全球径流数据中心提供观测到的流量的时间序列，这对于校准和验证水文模型的结果很有价值。我们解决了大型水文中的一个常见问题，尽管经过多次调查，该问题仍未得到令人满意的解决。为了比较模拟和观察到的流量，基于网格的水文模型必须将报告的站点位置与分辨率相关的网格化河网相匹配。我们在较粗的网格尺度上对选定的站点位置引入了交叉联合比率方法，从而减少了将站点分配到正确的上游盆地的错误。我们使用基于高分辨率（3 角秒）河网的附加站点更新了已有 10 年历史的流域边界数据库，并提供源代码和高分辨率和低分辨率流域边界。