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4.3.44. Drainage Parameters

Parameters for surface water storage drainage.

Parameters:

store_min

Minimum water storage capacity

Unit:

mm

Default:

0.0

store_max

Maximum water storage capacity

Unit:

mm

Default:

None (optional)

store_cap

Current water storage capacity - the actual storage capacity available for surface water retention. This represents the depth of water that can be stored on or in the surface before drainage begins. For paved surfaces, this might represent depression storage; for vegetated surfaces, it includes canopy interception storage.

Unit:

mm

Default:

None (optional)

drain_eq

Drainage equation selection (0: linear, 1: exponential)

Unit:

dimensionless

Default:

0

drain_coef_1

Drainage coefficient 1 (rate parameter)

Unit:

mm h^-1

Default:

None (optional)

drain_coef_2

Drainage coefficient 2 (shape parameter)

Unit:

dimensionless

Default:

None (optional)

ref

The ref parameter group is defined by the Reference Info structure.