Utah HUC Boundaries

This data set is a subset of the complete digital hydrologic unit boundary layer to the Subwatershed (12-digit) 6th level for the State of Utah. The State Watershed Boundary (WBD) was dissolved to the 8 digit, 4th level sub-basin.
The State WBD consists of geo-referenced digital data and associated attributes created in accordance with the "FGDC Proposal, Version 1.0 - Federal Standards For Delineation of Hydrologic Unit Boundaries 3/01/02"(http://www.ftw.nrcs.usda.gov/huc_data.html). Polygons are attributed with hydrologic unit codes for 4th level sub-basins, 5th level watersheds, 6th level subwatersheds, name, size, downstream hydrologic unit, type of watershed, non-contributing areas and flow modification. Arcs are attributed with the highest hydrologic unit code for each watershed, linesource and a metadata reference file.

本数据集为犹他州完整数字水文单元边界层至子流域（12位数字）第六级的一个子集。州级流域边界（WBD）已分解至8位数字，第四级子盆地。州级WBD包含根据“联邦地理数据委员会提案，版本1.0 - 水文单元边界划定的联邦标准 3/01/02”（http://www.ftw.nrcs.usda.gov/huc_data.html）创建的地理参照数字数据和相关的属性。多边形被赋予第四级子盆地、第五级流域、第六级子流域、名称、面积、下游水文单元、流域类型、非贡献区域和流量修改等属性。弧线则被赋予每个流域的最高水文单元代码、线源以及一个元数据参考文件。