Option

Description

Rain Gage

Name of the rain gauge associated with the new subcatchments.

Impervious

Area (%)

Percent of land area which is impervious.

Roughness (N)

Manning's n for overland flow over the impervious portion of the subcatchment (Typical Values).

Depression Storage

Depth of depression storage on the impervious portion of the subcatchment (millimetres or inches) (Typical Values).

Pervious

Roughness (N)

Manning's n for overland flow over the pervious portion of the subcatchment (Typical Values).

Depression Storage

Depth of depression storage on the impervious portion of the subcatchment (millimetres or inches) (Typical Values).

Subarea

Zero Impervious (%)

Percent of the impervious area with no depression storage.

Subarea Routing

Choice of internal routing of runoff between pervious and impervious areas:

• IMPERV - Runoff from pervious area flows to impervious area.

• PERV - Runoff from impervious flows to pervious area.

• OUTLET - Runoff from both areas flows directly to outlet.

Percent Routed (%)

Percent of runoff routed between sub-areas.