Global Water Provinces

Retirement Notice: This item is in mature support as of April 2026 and will be retired in December 2027. A new version of this item is available for your use. Esri recommends updating your maps and apps to use the new version. River basins or hydrologic units are often the spatial unit used for aggregating and analyzing components of the water cycle such as precipitation, runoff, riverine discharge, etc. The hydroSHEDS dataset, derived from the Shuttle Radar Topography Mission, are the most commonly used global hydrologic unit for these analyses. But when planning water use or gaps, political boundaries need to be considered. Water provinces (Straatsma et al 2020) provide a much more realistic hydrologic unit for such purposes. Esri’s World Administration Divisions (2011) defines 3,300 subnational units. Areas less than 150,000 sq km were aggregated into 1,099 regions. The water provinces were then calculated by overlaying these regions with the major basins from hydroSHEDS. After sliver polygons were removed, the result was 1,604 unique units based on river basins but constrained by political boundaries. These water provinces provide a suitable unit for longterm water use planning, especially at local scales. A more detailed description can be accessed here. Dataset Summary Phenomenon Mapped: Water provinces of the world Geographic Extent: Global Layer Projection: Web Mercator Auxiliary Sphere Update Frequency: Semi-annual Source: PCR-GLOBWB Data Vintage: June 2013 Publication Date: March 2021 Questions? Please leave a comment below if you have a question about this layer, and we will get back to you as soon as possible.停用通知：本产品自2026年4月起进入成熟支持阶段，将于2027年12月正式停用。目前已有可用的新版本，Esri建议您更新相关地图与应用程序以使用新版本。 流域或水文单元常被用作聚合与分析水循环各组成部分（如降水、径流、河道流量等）的空间单元。基于航天飞机雷达地形测绘任务（Shuttle Radar Topography Mission）生成的hydroSHEDS数据集，是此类分析中最常用的全球水文单元。但在规划水资源利用或评估缺口时，需考虑政治边界因素。水资源分区（Water provinces，Straatsma等，2020）可为此类场景提供更贴合实际的水文单元。Esri发布的2011版世界行政区划（World Administration Divisions）共定义了3300个次国家级行政单元，面积小于15万平方千米的区域被聚合为1099个大区。随后通过将这些大区与hydroSHEDS的主要流域进行叠加分析，计算得到水资源分区。移除碎多边形（sliver polygons）后，最终得到1604个以流域为基础、受政治边界约束的独立水文单元。该水资源分区适用于长期水资源利用规划，尤其适合局域尺度的规划工作。可通过此处获取更详细的说明。 数据集摘要 制图对象：全球水资源分区 地理覆盖范围：全球 图层投影：Web墨卡托辅助球体投影 更新频率：每半年一次 数据源：PCR-GLOBWB 数据版本时间：2013年6月 发布日期：2021年3月 如有疑问？若您对该图层有任何问题，请在下方留言，我们将尽快回复您。