Tarsier Tutorial: Watershed simulation using the Marmoset Model
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Contents
Prerequisites
Importing Hydro DEM into Tarsier
- Find your hydroDEM and change the extension from .txt to .asc.
- Open Tarsino
- Open your hydroDEM raster by going to File->Open, navigate to your raster and click open.
- Save the raster
- File->Save As.
- The Tarsier Save Dialog should come up. The top yellow box is the raster viewer file *.trv. The second box is your raster file *.tra. Go to the second box and click the browse button. Browse to an appropriate folder and give the file a name. Click the 'Save All' Button.
Creating a Network data using the WatershedForm
- Create a new Watershed form
- File->New->Analysis->Watershed form
- Go to the input tab and load your hydroDEM
- Create a pointer image(Ptr) raster
- Go to the streams tab and click the Calc Ptr button
- Go to the Ptr UseeControl and click the view button.
- Now save your Ptr raster
- File->Save As.
- The Tarsier Save Dialog should come up. The top yellow box is the raster viewer file *.trv. The second box is your raster file *.tra. Go to the second box and click the browse button. Browse to an appropriate folder and give the file a name. Click the 'Save All' Button.
- Close the Ptr raster
- Calculate the streams
- Set the threshold upslope area above which cells are considered streams by changing the value inside the Tresh box.
- Click Calc stream button - this will calculate NetPtr, UpslopeArea, LnA, and Stream.