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Deriving the Geomorphological Regions
In Cotopaxi Province, Ecuador
Suzanne Vijfhuizen, Greg BurtonSuzanne Vijfhuizen, G...
2
Deriving the Geomorphological Regions
In Cotopaxi Province, Ecuador
Geografische Informatie Systemen
Theorie en Praktijk...
3
Deriving the Geomorphological Regions
In Cotopaxi Province, Ecuador
Ecuador & Cotopaxi Province Study Area
Location: Ecu...
4
Deriving the Geomorphological Regions
In Cotopaxi Province, Ecuador
Methodology: GIS & Related Processes
Universiteit va...
5
Deriving the Geomorphological Regions
In Cotopaxi Province, Ecuador
Methodology: Creating the Geomorphologic Map
Univers...
6
Deriving the Geomorphological Regions
In Cotopaxi Province, Ecuador
Methodology: Project Area Correlation
Universiteit v...
7
Deriving the Geomorphological Regions
In Cotopaxi Province, Ecuador
Results and Discussion
Universiteit van Amsterdam
Pr...
8
Deriving the Geomorphological Regions
In Cotopaxi Province, Ecuador
Conclusion
Though the derived unsupervised geomorphi...
9
Deriving the Geomorphological Regions
In Cotopaxi Province, Ecuador
Universiteit van Amsterdam
9
Deriving the Geomorphological Regions
In Cotopaxi Province, Ecuador
Universiteit van Amsterdam
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  1. 1. 1 Deriving the Geomorphological Regions In Cotopaxi Province, Ecuador Suzanne Vijfhuizen, Greg BurtonSuzanne Vijfhuizen, Greg Burton Geografische Informatie Systemen: Theorie en PraktijkGeografische Informatie Systemen: Theorie en Praktijk May 11, 2004May 11, 2004
  2. 2. 2 Deriving the Geomorphological Regions In Cotopaxi Province, Ecuador Geografische Informatie Systemen Theorie en Praktijk Mission Statement Universiteit van Amsterdam Central Course Theme: As part of the GIS-course, Geografische Informatie Systemen: Theorie en Praktijk, a case study was conducted to demonstrate knowledge of GIS processes. The study project was designed to derive theoretical geomorphology landscape units within the Cotopaxi Province, Ecuador. Tools: ESRI® ArcGIS 8.3 ™, Spatial Analyst ™, 3D Analyst ™, ArcToolbox ™, ArcCatalog ™, ArcEditor ™, ArcScene ™, ERDAS Imagine™, Microsoft Excel ™, Geomorphologic Theory. Research Question: Can Geomorphological Regions be predicted and derived using morphometric criteria, spatial data together with ArcGIS?
  3. 3. 3 Deriving the Geomorphological Regions In Cotopaxi Province, Ecuador Ecuador & Cotopaxi Province Study Area Location: Ecuador is located on the northwest coast of South America between approximately 1o north latitude and 5o South latitude. Project Location: Cotopaxi Province straddles the crests of the Cordillera Occidental and the Cordillera Oriental (Andes). Climate: Tropical and Tropical Monsoon, with local Humid Temperate, Humid Dry, and Arid in project area. Geology: Three main regions: the coastal plain, the two Andean ranges, and the upper Amazon Basin. Hydrology: Headwaters of Pacific Ocean and Amazon Basin. Soils: Andepts or Andisols of recent volcanic origin. Universiteit van Amsterdam
  4. 4. 4 Deriving the Geomorphological Regions In Cotopaxi Province, Ecuador Methodology: GIS & Related Processes Universiteit van Amsterdam Processes •Surface Processes Modeling •Metadata & Database Creation •Reprojecting •3 D scene Building & Graphics Creation •TIN Model Creation and Clipping •Spatial Analyst: Raster Calculator, Vector Creation •3D Analyst: Interpolation of Continuous Surfaces •Shapefile Creation & Editing •Vector Intersection, Merging, & Clipping •Thematic Data Creation and Editing •Coverage Converting •Raster Mosaicing & Clipping •Spreadsheet Analysis and Charting
  5. 5. 5 Deriving the Geomorphological Regions In Cotopaxi Province, Ecuador Methodology: Creating the Geomorphologic Map Universiteit van Amsterdam Morphometric Derivation: Using Elevation and Slope criteria in modeling geomorphology, 15 elevation Intervals and 4 Slope intervals for 60 Geomorphic classes. Mapping Geomorphological Regions: TIN Model, Elevation and Slope data used to create maps displaying elevation, slope, Cotopaxi Geomorphological Regions, and study area
  6. 6. 6 Deriving the Geomorphological Regions In Cotopaxi Province, Ecuador Methodology: Project Area Correlation Universiteit van Amsterdam Checking Geomorphology: Soil formation factors (parent material, climate, topography, biota, and time) are integral to Geomorphological processes (weathering, mass wasting, alluvial, glacial, aeolian, volcanism and tectonics). Using this: Geomorphology and Soils can be correlated by GIS Intersection and used to check derived geomorphological regions. Visualizing Topography: Topography projected into 3D space was compared for correlation.
  7. 7. 7 Deriving the Geomorphological Regions In Cotopaxi Province, Ecuador Results and Discussion Universiteit van Amsterdam Project Constraints: The goal of this study was to derive a geomorphological map of Cotopaxi Province of Ecuador based on morphometric constraints, and then correlated with available and derived data. However due to lack of time, large files and processing speed a study area was selected for the comparison. Morphometric Derivation Review: Volcanism, which is not a climatic based geomorphological process, might not be predicted based on morphometric criteria that is implicated in climatically driven processes. Additionally, because of latitude and recent volcanic activity, glacial landforms are not in evidence. However, other geomorphology landscape units were found in predicted areas. Soils and Precipitation Correlation: Soil types were correlated to volcanism and a derived precipitation gradient.
  8. 8. 8 Deriving the Geomorphological Regions In Cotopaxi Province, Ecuador Conclusion Though the derived unsupervised geomorphic classification scheme was found to be not always accurate, especially within the volcanic and glaciation processes units, other derived processes were found to correspond to the right derived geomorphology, especially those areas derived as alluvial, alluvial/aeolian, alluvial mass movement, and mass movement. Within the current context, we are dealing with a very young volcanic landscape where concepts of surface processes that are only restricted to slope and elevation may not be able to account for processes; and time scales that too short for these competing simultaneous processes to express themselves completely. Universiteit van Amsterdam
  9. 9. 9 Deriving the Geomorphological Regions In Cotopaxi Province, Ecuador Universiteit van Amsterdam
  10. 10. 9 Deriving the Geomorphological Regions In Cotopaxi Province, Ecuador Universiteit van Amsterdam

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