public enum SurfaceType| ImperviousSteep | 0 | 0 |
| ImperviousFlat | 1 | 1 |
| PerviousSmall | 2 | 2 |
| PerviousMedium | 3 | 3 |
| PerviousLarge | 4 | 4 |
| Impervious | 32 | Custom impervious surface |
| Pervious | 33 | Custom pervious surface |
| LID | 64 | Surface is with LID |
| IsImpervious |
Returns true when the surface is impervious
(Defined by RRExtensions) |
| IsOneOf |
Returns true if enumeration is one of the listed ones.
(Defined by GenericExtensions) |