Scattered throughout JuneauNature, you’ll find user-customizable mapping portals created in ArcGIS Online. Because the sub-pages of Juneau areas are defined by watershed, the introductory map below delineates watershed units for the CBJ (City and Borough of Juneau). You can explore the map within our site, or click view larger map, which takes you to ArcGIS Online. On either site, try zooming with your mouse wheel—way more effective than clicking +/- on the map. A contour hillshade map is the default, but by clicking the 4-square basemap symbol, you can choose imagery or other options. Clicking within any of the subshed units launches a popup with more information. The box in upper right allows search for any feature on the base map. Try entering your street address, or a natural feature such as a stream or mountain.
“Subshed” is a term our wetlands survey team began to use for true watershed basins that we mapped to extreme accuracy, based on 2013 LiDAR acquired by the City of Juneau for that project. I located watershed divides by reference to a very detailed streams model, and 2-foot contours. We call them subsheds because they’re considerably smaller than the finest existing units as mapped by the Forest Service (VCU: value comparison unit) or US Geological Survey (HUC: hydrologic unit code). I began from the latter HUC units, but fine-tuned them throughout the summer of 2014.
Key Juneau watersheds
Mainland watersheds are listed from north to south; then Douglas watersheds from east to west. Ten of these watersheds (marked with *, below) were studied for the CBJ Natural History Project.
Douglas Island watersheds: