Estimating Ephemeral Streams QGIS Layer Packages, Map Files, and Methods

This dataset was used to estimate total ephemeral stream length within the Coeur d'Alene, Fort Apache, and Menominee Reservations. It includes data that is publicly available through the USGS "The National Map" (USGS TNM Download v2.0), including NHDPlus High Resolution hydrography data, and Contour (1:24,000-scale) elevation data. It also includes geographic boundaries for the above mentioned Native American Reservations, as well as "eph5ha" raster data (Fesenmyer et al. 2021), which was used to approximate ephemeral stream locations. The remaining layers in the dataset include exported, site-specific NHDPlus hydrography data, and hand-digitized, estimated ephemeral streams, based on the eph5ha raster data. A map PNG of all three reservations is also included, as well as the map file used to create that map image. Lastly, a PDF of the methods used for this mapping project is also attached.

本数据集用于估算科达伦、阿帕奇堡及梅诺米尼印第安保留地内的暂时性河流总长度。数据集包含通过美国地质调查局（United States Geological Survey, USGS）"国家地图"（The National Map）v2.0下载渠道公开获取的数据，其中包括NHDPlus高分辨率水文数据以及1:24000比例尺等高线高程数据。此外，数据集还涵盖上述印第安保留地的地理边界数据，以及用于估算暂时性河流分布的"eph5ha"栅格数据（Fesenmyer等，2021）。数据集其余图层包括导出的、针对本研究区域的NHDPlus水文数据，以及基于eph5ha栅格数据经手工数字化得到的估算暂时性河流矢量图层。数据集同时包含三个保留地的PNG格式地图文件，以及用于生成该PNG地图的源地图文件。最后，本数据集还附带了本次制图项目所采用方法的PDF文档。