Methods for delination

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This is the case for this lab report. There are three points; the two outlets and the guage

In SAGA GIS the Channel Network toool is used

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In SAGA GIS vectorize the watershed raster

In SAGA GIS the Flow Accumulation (Top-Down) tool is used which takes the depression voided DEM as input

In SAGA GIS the Fill SInk (Win Liu) tool is used

In this case, through trial and error, a value of 550,000 is used because its output appears to match the real streams adequately.

Derive a watershed for each point

Modify the watershed as need

Done

Methods for delination

Input: Digital Elevation Model (10m resolution)

Remove sinks. Create a filled dem

Make a flow direction raster using the filled dem and the D8 method

Make a flow accumulation raster

Make a stream network based on a chosen initiation threshold.

Are pour points provided?

True

Create a stream link raster

Derive a watershed for each stream section