NorWeST Observed Stream Temperature Points (Feature Layer)

This layer indicates the location of the observed stream temperature records used for the NorWeST database summaries. NorWeST summer stream temperature scenarios were developed for all rivers and streams in the western U.S. from the greater than 20,000 stream sites in the NorWeST database where mean August stream temperatures were recorded. The resulting dataset includes stream lines (NorWeST_PredictedStreams) and associated mid-points NorWest_TemperaturePoints) representing 1 kilometer intervals along the stream network. Stream lines were derived from the 1:100,000 scale NHDPlus dataset (USEPA and USGS 2010; McKay et al. 2012). Shapefile extents correspond to NorWeST processing units, which generally relate to 6 digit (3rd code) hydrologic unit codes (HUCs) or in some instances closely correspond to state borders. The line and point shapefiles contain identical modeled stream temperature results. The two feature classes are meant to complement one another for use in different applications. In addition, spatial and temporal covariates used to generate the modeled temperatures are included in the attribute tables at https://www.fs.usda.gov/rm/boise/AWAE/projects/NorWeST/ModeledStreamTemperatureScenarioMaps.shtml. The NorWeST NHDPlusV1 processing units include: Salmon, Clearwater, Spokoot, Missouri Headwaters, Snake-Bear, MidSnake, MidColumbia, Oregon Coast, South-Central Oregon, Upper Columbia-Yakima, Washington Coast, Upper Yellowstone-Bighorn, Upper Missouri-Marias, and Upper Green-North Platte. The NorWeST NHDPlusV2 processing units include: Lahontan Basin, Northern California-Coastal Klamath, Utah, Coastal California, Central California, Colorado, New Mexico, Arizona, and Black Hills.This record was taken from the USDA Enterprise Data Inventory that feeds into the https://data.gov catalog. Data for this record includes the following resources: ISO-19139 metadata ArcGIS Hub Dataset ArcGIS GeoService CSV Shapefile GeoJSON KML For complete information, please visit https://data.gov.本图层展示了用于西北溪流温度情景数据库（NorWeST）汇总分析的实测溪流温度记录点位。NorWeST夏季溪流温度情景针对美国西部所有河流与溪流构建，其数据源自NorWeST数据库中超过20000个监测点位的8月平均溪流温度记录。生成的数据集包含溪流线要素（NorWeST_PredictedStreams）及配套的中点点位要素（NorWest_TemperaturePoints），沿溪流网络以1公里为间隔布设。溪流线要素源自比例尺1:100000的NHDPlus数据集（美国环境保护署与美国地质调查局，2010；McKay等人，2012）。形状文件（Shapefile）的空间范围与NorWeST处理单元对应，此类处理单元通常对应6位水文单元代码（HUCs，即第三级编码），部分场景下则与州界高度吻合。线要素与点要素形状文件包含完全一致的模拟溪流温度结果，两类要素类互为补充，可适配不同应用场景。此外，用于生成模拟温度的空间与时间协变量已存储于属性表中，相关资源可访问：https://www.fs.usda.gov/rm/boise/AWAE/projects/NorWeST/ModeledStreamTemperatureScenarioMaps.shtml。NorWeST的NHDPlusV1处理单元包括：萨蒙流域、克利尔沃特流域、斯波科特流域、密苏里河源流域、斯内克-贝尔流域、中斯内克河流域、中哥伦比亚河流域、俄勒冈海岸流域、俄勒冈中南部流域、上哥伦比亚-亚基马流域、华盛顿海岸流域、上黄石-大角流域、上密苏里-马里亚斯流域以及上格林-北普拉特流域。NorWeST的NHDPlusV2处理单元包括：拉洪坦盆地、北加州-海岸克拉马斯流域、犹他州流域、加州海岸流域、加州中部流域、科罗拉多流域、新墨西哥流域、亚利桑那流域以及布莱克希尔斯流域。本数据集记录源自美国农业部企业数据清单（USDA Enterprise Data Inventory），该清单同步至https://data.gov目录。本记录包含以下资源：ISO-19139元数据、ArcGIS Hub数据集、ArcGIS地理服务、CSV格式文件、Shapefile格式文件、GeoJSON格式文件以及KML格式文件。如需完整信息，请访问https://data.gov。