Problem

After computing the model user notification appears - The total area in the CN/Area Collection does not equal the total catchment area.

Solution

This error is seen when the area is defined by “Multiple Subareas” and the area specified in the subareas collection is not equal to the total area of the catchment.

• Go to the catchment properties>Subareas>collection>check the “area/total area (%)” that should be equal to total 100% to match the total area of the catchment.
• For the subareas option, the division of all the area should be defined with respective SCS CN factors, i.e. you should cover 100 % area subdivision.

See Also

http://communities.bentley.com/products/hydraulics___hydrology/w/hydraulics_and_hydrology__wiki/9217.mulitple-cn-numbers-for-a-catchment-and-multiple-catchments-with-a-single-outlet-node