Drainage Line

Strahler Order

Strahler Ordering is a method for classifying Drainage Lines. Increasing numbers indicate a higher level of flow Accumulation. By selecting a given value, all branches with a lower value will be omitted from display.

Filtering

Flow Accumulation (FA) filter. Drainage Lines will not be displayed when the FA value of a grid cell is below the selected option. This will speed up computation and rendering time, especially on larger datasets. The items in the drop-down-list can be tailored and optimized under Settings. 

Run

Generates the second part of the Watershed Model by calculating Drainage Lines. The output will display Drainage Lines according to the values gives for Strahler Order and Filtering.