High-resolution hydrographic mapping was completed for a pilot area consisting of three 12-digit hydrological units on Skunk Creek near Sioux Falls, South Dakota. A lidar-derived digital elevation model from the National Elevation Dataset was processed using selective drainage methods to hydroenforce culvert locations into the modeled drainage network. The hydroenforced digital elevation model was then used to produce lidar-derived watershed boundaries and surface drainage patterns. These products provide resource managers with better detail and a more current picture of hydrographic features than has previously been available within the study area.
Differences between the Watershed Boundary Dataset (WBD) and lidar-derived watershed boundaries.