Integrated Hydrological Units of the United Kingdom: Catchments

This dataset is part of Integrated Hydrological Units (IHU) of the UK, a set of geographical reference units for hydrological purposes including river flow measurement and hydrometric data collection. This dataset was derived from the Integrated Hydrological Terrain Model. A Catchment represents the full area upstream from a Section outlet, which is a cell upstream of a confluence of two watercourses with known names. While Sections do not overlap, Catchments can overlap because one Catchment contains Catchments for all upstream Sections. This layer currently covers Great Britain only as no dataset with river geometries and names with suitable detail is available for Northern Ireland. Full details about this dataset can be found at https://doi.org/10.5285/10d419c8-8f65-4b85-a78a-3d6e0485fa1f

本数据集隶属于英国综合水文单元（Integrated Hydrological Units, IHU），为一套用于水文目的的地理参考单元，包括河流流量测量和水文数据收集。该数据集源自综合水文地形模型。流域指从某一段落出口上游的全部区域，段落出口位于两个已知名称水道汇合处上游的单元格。尽管段落之间不重叠，但流域可以相互重叠，因为一个流域包含所有上游段落的流域。当前该图层仅覆盖大不列颠岛，因为北爱尔兰尚无包含河流几何形状和名称的详尽数据集。关于本数据集的详细信息可在以下链接查阅：https://doi.org/10.5285/10d419c8-8f65-4b85-a78a-3d6e0485fa1f