How to identify the basin using Trispace

TRISPACE also allows reading in a direct way the SRTM files: from the File/Open menu, select the .srtm file in the openings filter.

Procedure

Execute the triangulation and trace out the slope vectors from the Elabora/Work out menu.

On the basis of the slope vectors, trace out the polygon which identifies the basin clockwise using the polygon tool.

Trace out the main river pole from uphill to downhill using the polyline tool: this setting is significant to establish the direction of the water flow in Hydrologic Risk.

From the Elabora/Work out menu, select the Crea bacino idrografico/Create catchment basin control: a file in ASCII format to be imported to Hydrologik will be created.