Thursday, May 29, 2014

Applications in GIS Student Spotlight

GIS5100 Applications in GIS, Dr. Paul Zandbergen

Watershed Analysis

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

The following student was chosen for their exception work on the Watershed Analysis Lab assignment:

Gail Sease 

About Gail: Gail lives in Bakersfield, CA has earned BS and MS degrees in geology but has not worked as a geologist for a long time.   Her occupations over the last 20 years have included oil company geologist, junior college geology instructor, Spanish student, teacher of middle school and high school Spanish, biology and geology, school librarian and school secretary.  Before moving to Bakersfield in 2011, she lived with her family in Bogotá, Colombia and Tripoli, Libya for 8 years.  Gail would like to get back into the oil and gas or minerals industries and is seeking to bring her skills up to date.  GIS expertise is extremely valuable in these and many other fields.  Her sister is currently working on her internship at UWF's GIS Master's certification program and her experiences have convinced Gail that it will be an excellent opportunity.

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!

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