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Spatial Analysis – A Case Study

Spatial Analysis – A Case Study. Patrick Kish Class project for Resource Management 591 West Virginia University 14 Dec 2001. Problem. Landslides are present in certain areas of West Virginia Question: How much of a determinant is land slope in this matter?. Where to begin?.

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Spatial Analysis – A Case Study

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  1. Spatial Analysis – A Case Study Patrick Kish Class project for Resource Management 591 West Virginia University 14 Dec 2001 CS 128/ES 228 - Lecture 13b

  2. Problem • Landslides are present in certain areas of West Virginia • Question: How much of a determinant is land slope in this matter? CS 128/ES 228 - Lecture 13b

  3. Where to begin? • West Virginia Landslide and Slide Prone Areas map Paper only so scanned in CS 128/ES 228 - Lecture 13b

  4. What to add? • DEMs available at different resolutions • 10 meter and 30 meter resolution DEMs imported • Also a Geology map and a DOQQ CS 128/ES 228 - Lecture 13b

  5. Adding relevant data • Landslide polygons added through “heads up” digitization • Attribute table used for determining area of slides CS 128/ES 228 - Lecture 13b

  6. Hypothesis • Slope has something to do with the prevelance of landslides • Literature suggests that 35 degrees is a critical value CS 128/ES 228 - Lecture 13b

  7. Getting Slope Information • ArcMap’s Spatial Analysis was applied to DEMs • Slope shown by color – degree values in Table of Contents CS 128/ES 228 - Lecture 13b

  8. 30 meter resolution CS 128/ES 228 - Lecture 13b

  9. 10 meter resolution CS 128/ES 228 - Lecture 13b

  10. More interesting analysis • Intersecting slope map with slide polygons layer allows us to determine average slope of a slide • Determined to be 34.81 degrees CS 128/ES 228 - Lecture 13b

  11. Further filtering – 10 m CS 128/ES 228 - Lecture 13b

  12. Further filtering – 30 m CS 128/ES 228 - Lecture 13b

  13. Final product • What layers should be included? • How should they be arranged? CS 128/ES 228 - Lecture 13b

  14. A Useful Map? CS 128/ES 228 - Lecture 13b

  15. Intriguing Questions • Why doesn’t 30 m map do “better”? • What role does geology play? What about soil type? CS 128/ES 228 - Lecture 13b

  16. BIBLIOGRAPHY • All figures (and details about the study) were taken from: http://www.nrac.wvu.edu/rm493-591/fall2001/students/kish/ The%20Use%20of%2010%20Meter%20and%2030%20Meter%20Digital%20Elevation%20Models%20for%20Determining%20Areas%20Susceptible%20to%20Landsliding%20in%20the%20Morgantown%20N.htm • Better approach – go to http://www.nrac.wvu.edu/rm493-591/ and explore projects (This one from Fall 2001 – Patrick Kish) CS 128/ES 228 - Lecture 13b

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