A depth-percent damage relationship (i.e., curve) defines the percent damage caused to a structure, a structure's contents, and any vehicles stored at a structure at incremental depths. As depth increases, percent damage also increases. Depth-percent damage relationships are defined in HEC-FIA within the Structure Occupancy Type dialog. An example depth-percent damage relationship is shown in the table below. For depths between ordinates, the percent damage is linearly interpolated.
Example Depth-Percent Damage Relationship

Depth
(feet)

Percent
Damage

0.00

0.00

1.00

32.00

2.00

38.70

3.00

45.50

4.00

52.20

5.00

58.60

6.00

64.50

7.00

69.80

8.00

74.20

9.00

77.70