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GIS Applications in Hydrology

GIS Applications in Hydrology. Baxter E. Vieux, Ph.D., P.E. School of Civil Engineering and Environmental Science University of Oklahoma 202 West Boyd Street, Room CEC334 Norman, OK 73019 bvieux@ou.edu. Web Pages. Faculty profile

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GIS Applications in Hydrology

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  1. GIS Applications in Hydrology Baxter E. Vieux, Ph.D., P.E. School of Civil Engineering and Environmental Science University of Oklahoma 202 West Boyd Street, Room CEC334 Norman, OK 73019 bvieux@ou.edu

  2. Web Pages • Faculty profile http://www.coe.ou.edu/research/profiles/cees/vieux/content.html • Environmental Modeling and GIS Laboratory Under construction, but… http://www.coe.ou.edu/emgis/contact.htm • Independent Study Course in Hydrology http://www.occe.ou.edu/isd/ce5843/ • On campus course in Hydrology http://www.ecn.ou.edu/vieux/www/ce5843/index.htm

  3. Geographic Information Systems Geographic information systems (GIS) are a useful tool for analysis of spatially distributed features on and under the earth surface. Considering the inherently spatial character of components of the hydrologic cycle, GIS is increasingly used by hydrologists to analyze, simulate, and understand hydrologic processes. Representation of the essential physical characteristics of a hydrologic process in terms of parameter maps raises issues not generally considered by hydrologists before the advent of the technology and spatial data. Spatial resolution, scale, attribute uncertainty, surface interpolation, error propagation, and aspects related to the linkage or integration of spatially distributed data within a GIS and a hydrologic model. Web links: http://www.ecn.ou.edu/vieux/www/ce5843/resources/index.htm

  4. GIS Data Characteristics of GIS Data— • Map scale, spatial detail, and extent • Coordinate systems • Datums • Map projections • Points, contours, rasters, TINs

  5. Data types • Watershed boundaries delineation • Soil and landuse/cover classification • Digital elevation data • Meteorological parameters • Radar • Satellite

  6. Digital Elevation Model We are here I was there

  7. Projections • Georeferenced coordinate systems • Review of geographic coordinates • Ellipsoidal versus spherical

  8. Stereographic Projection • Parameters— • Spheroid=sphere • Central Meridian=105W • Reference Latitude=60N

  9. HRAP Projection • Parallels of latitude • 0 equator • +90 North pole • Meridians of longitude • 0 Greenwich England • 0-180 Western

  10. GIS Application to Flood Prediction • Mapping rainfall into a basin • Rainfall intensities in space and time • Rainfall extent versus basin size • Case study: Tulsa, May 5-6, 2000

  11. Basin Hydrology Using GIS Objective— • Use a GIS to estimate rainfall accumulations over a small watershed • Become familiar with GIS concepts involved with • Watershed delineation • Rainfall maps • Fast response basin hydrology

  12. Tulsa, Oklahoma May 5-6, 2000

  13. Storm Total Tulsa, Oklahoma May 5-6, 2000

  14. Exercise Items you will need-- • Laboratory handout— tulsa_ex.doc TulsaWorld.htm • Exercise data— tulsa_ex.apr Open the Arcview Project Follow the exercise

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