Raster and Vector Datasets
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3.4.2 Model Parameter and Input 3.4.2.1 Schematic Watershed Model – Watershed Delineation
First step in hydrological modeling is delineating watershed boundaries and discretize to hydrology response unit. The aim of the watershed delineation
process is to determine the boundary of the watershed and also to break it into smaller management unit sub-basin if necessary. The watershed boundary was
derived from Suttle Radar Terrain Mission SRTM data with 90 by 90 meters of spatial resolution. It divided into seven sub-basins as shows in Figure 3.12. In
additional to determining the catchment boundary and its sub-basins area, the watershed delineation process is also determined the stream network and its
related parameters such as basin slope, river slope, basin distance, river length, etc. The watershed delineation process was done by using HEC-GeoHMS tool
that is can be integrated as plug-in on ArcMap.
Connector Reach
Junction OutletSink
Sub-Basin
Figure 3.12 Schematic network element of HEC-HMS model in Palu catchment
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