In this lab assignment students completed all the steps necessary to delineate streams and watersheds from a Digital Elevation Model (DEM), first by making the DEM hydrologically correct and then creating flow direction and flow accumulation rasters, followed by stream delineation and watershed delineation. Students also examined how well the results from automated delineation compared with datasets for streams and watersheds form other sources.
Student Learning Outcomes:
- Become familiar typical procedures for stream and watershed delineation
- Examine how a hydrologically correct DEM differs from an unprocessed DEM
- Understand how flow direction and flow accumulation concepts are implemented in a raster environment, and used to create streams segment and catchment
- Analyze differences in linear and area objects in vector and raster
STUDENT SPOTLIGHT AWARDS
The following student was chosen for their exception work on the Watershed Analysis Lab assignment:
What we like: Gail did a solid job documenting the differences between the streams and watersheds delineated from the DEM and the streams and watersheds from existing sources. This includes measures based on length and area, but also measures based on coincident areas and stream order. While the study area (the island of Kauai) has mostly very well defined topography, some of the differences are quite substantial. Way to go Gail, and welcome back to the Spotlight!