3D Analyst Watershed Lombok

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Determining Watersheds in Lombok Island using ArcView 3.3
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Hapsari Maharani

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3D Analyst Watershed Lombok

  1. 1. 3D Analyst : Determining Watersheds in Lombok Island Using ArcView 3.3 Hapsari Maharani - G051060041 MSc in IT for Natural Resource Managemen Bogor Agriculture University 2007
  2. 2. Hapsari Maharani - G051060041 MSc in IT for Natural Resource Managemen Bogor Agriculture University 2007 Lombok is one of 17.000 island in Indonesia. Lombok located at east of Bali. This island have various topography, specially in in the north area (high mountain, valley, coastal, and stream). By using 3D analyst will determined watershed as hidrologycal model in these area. Information about watershed very usefull to analyse or predict some cases, such as flood, landslide, or planning. Description area
  3. 3. Some Steps to Determine Watershed using ArcView 3.3 <ul><li>Check properties of arcView </li></ul><ul><li>Before we working with arcView better if we check some properties of these software. </li></ul><ul><li>View properties should be in meter </li></ul><ul><li>Activated extention 3D analys </li></ul><ul><li>And setting work directory </li></ul>Creating DEM from SRTM Export SRTM data into ASCII Grid (DEM), then import these data in ArcView. SRTM DEM
  4. 4. Activate the Map Calculator 1. Flow Direction ([DEM].FlowDirection(FALSE)) 2. Flow Accumulation ([FlowDir].FlowAccumulation(NIL)) 3. Identifying Stream ([FlowAcc] < 1000.AsGrid).SetNull(1.AsGrid) 4. Labeling the Link ([Stream 1000].StreamLink(FlowDir)) 5. Determining Watersheds ([FlowDir].Watershed(StreamLink)) 1 2 3 4 5
  5. 5. Viewing 3D using 3Dscene 3D using ArcView 3.3 3D of watershed 3D using original data SRTM

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