Determining Watersheds in Lombok Island using ArcView 3.3 by Hapsari Maharani

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. 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

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. Viewing 3D using 3Dscene 3D using ArcView 3.3 3D of watershed 3D using original data SRTM