Station of The Drainage Subdivision Point

Drainage area should be divided into subarea when following conditions occurs

  1. Change in average width of the pavement
  2. change in average width of the area drain to the gutter
  3. change in runoff coefficient
  4. there is a point inflow that flow to the gutter
User must specify the ENDING stations as well as any station where above condition occurs.

Because of using ENDING station to specify the drainage area, minimum of only one drainage station data can be used to cover the entire project such as the case for bridges with uniform traffic lanes.