Task 1

The delineation of this particular watershed consists of a few steps; it was first created by determining a pour point or a point where all of the watershed's water drains. By using the flow accumulation tool on the 10m DEM of the watershed I was able to determine the correct area of the BCC's pour point. As you can see by the blue dot on the west side of the watershed, the pour point coincides with the topography and is the ultimate confluence of all the tributaries.

TOOLS

Fill: This tool detects dips, sinks (cells without a defined drainage direction), or any cell that does not gradually create the DEM. The fill tool makes it so the DEM cells are adjusted in both height and size to accommodate for the change in elevation; this is why the pour point is a good focal point for this analysis; it allows for a culmination of the water contained within the shed.. It makes the actual DEM more of a fluid representation of what the landscape should be.

Flow Direction: The flow direction tool allows for every cell in the DEM raster to have a direction assigned to each individual cell. The flow direction is based on the the cell's surrounding cells. This tool is pretty neat because it can create representations of the actual actual flow of water in any given system.

Flow Accumulation:

The total area of the Big Cottonwood Watershed is 129,186 km sq.

To Task 2