A Proposed Workflow for Delineating Stream Networks from Lidar-Derived Digital Elevation Models to Update the National Hydrography Dataset (NHD) in the Pacific Northwest

摘要

The Pacific Northwest Hydrography Framework (PNWHF) is supporting efforts to evaluate the use of lidar-derived digital elevation data to delineate hydrographic features to update the National Hydrography Dataset (NHD). This paper describes the analytical methods used to derive an initial stream network to be reviewed by NHD stewards for a 10-digit hydrologic unit (HU) in the Oregon Cascade Range.