3D Watershed Celebes

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Deriving Watersheds Area from SRTM in Central Celebes
by Abdul Wahid Muklis

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3D Watershed Celebes

  1. 1. Deriving Watersheds Area from SRTM in Central Celebes Compossed by: Abdul Wahid Muklis G 051060111 3D Analyst 2007
  2. 2. Introduction <ul><li>3D analyst make model more realistic and easy to interpret according to the real 3D in the worlds </li></ul><ul><li>3D analyst tool to derive watershed as a hydrological model </li></ul><ul><li>Central Celebes located in Indonesia consist of highland (mountain), valley, hill and streams </li></ul><ul><li>DEM (Digital Elevation Model) data can derived from Shuttle Radar Topography Mission (SRTM) </li></ul>
  3. 3. Requirements <ul><li>SRTM data </li></ul><ul><li>3DEM software* </li></ul><ul><li>ArcMap** </li></ul><ul><li>ArcScene** </li></ul><ul><li>Arc Hydro Tools** </li></ul><ul><li>Vektor data (optional) </li></ul>**Copyright © ESRI *freeware
  4. 4. Steps 2 do <ul><li>Load SRTM data using 3DEM software - crop area - fill blank area - convert projection - then save as GeoTiff file (DEM data) </li></ul><ul><li>Open DEM (GeoTiff) file in ArcMap </li></ul>
  5. 5. Cont’d <ul><li>Do calculation in order to make integer value data and to vanish minus value in raster calculator, script: Int([sulteng.tif)] and Con ([sulteng.tif] < 0, 0, sulteng.tif]). </li></ul>
  6. 6. <ul><li>Flow Direction </li></ul><ul><li>Select Terrain Preprocessing | Flow Direction </li></ul><ul><li>Flow Accumulation </li></ul><ul><li>Select Terrain Preprocessing | Flow Accumulation </li></ul>Cont’d All steps to derived Watershed and Stream Network Delineation has been provided by ArcHydro tools:
  7. 7. <ul><li>Stream Definition </li></ul><ul><li>Select Terrain Preprocessing | Stream Definition </li></ul><ul><li>Stream Segmentation </li></ul><ul><li>Select Terrain Preprocessing | Stream Segmentation </li></ul>Cont’d
  8. 8. <ul><li>Catchment Grid Delineation </li></ul><ul><li>Select Terrain Preprocessing | Catchment Grid Delineation </li></ul><ul><li>Open all file resulted from previous step in Arc Scene </li></ul>Cont’d 3D Look
  9. 9. <ul><li>Be considered to the base height & rendering as z value in layer properties, also vertical exaggeration in scene properties </li></ul>Cont’d 3D Look
  10. 10. Cont’d 3D Look
  11. 11. That's All... Thank you....

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