Project File:Subsurface Drainage Network � Optional

3.12.1 Required Inputs

The following cards are REQUIRED for the simulation of subsurface drains.

Card	Argument	Description
STORM_SEWER	filename.spn	Card specifies that subsurface drainage be performed and identifies the input file that describes the newtork connectivity and physical description.

3.12.2 Optional Inputs

The following cards are REQUIRED for the simulation of subsurface drains.

Card	Argument	Description
GRID_PIPE	filename.gpi	File that contains the information needed to link the network to the groundwater model. Required when simulating tile drains.
HIGH_HEAD_RELEASE	none	Allows flow back to the overland from the storm drains during system surcharge.
SUPERLINK_C_OPT	none	Specifies that GSSHA assigns the proper node spacing within superliks.
SUPERLINK_DRAINMOD	none	Specifies the method used in DRAINMOD be used to compute flows into tile drains.

3.12.3 Output Cards

The following cards are REQUIRED for the simulation of subsurface drains.

Card	Argument	Description
SUPERLINK_JUNC_LOCATION	filename	File that defines the junctions for output.
SUPERLINK_NODE_LOCATION	filename	File that defines the nodes for output.
SUPERLINK_JUNC_FLOW	filename	File that contains the time series ouput data for the junctions listed in SUPERLINK_JUNC_LOCATION.
SUPERLINK_NODE_FLOW	filename	File that contains the time series ouput data for the nodes listed in SUPERLINK_NODE_LOCATION.

GSSHA User's Manual

3 Project File

3.1     Required Inputs

3.2     Mapping Table – Optional

3.3     Overland Flow – Required

3.4     Interception – Optional

3.5     Rainfall Input and Options – Required

3.6     Infiltration – Optional

3.7     Channel Routing – Optional

3.8     Continuous Simulations – Optional

3.9     Saturated Groundwater Flow – Optional

3.10     Soil Erosion – Optional

3.11     Constituent Transport – Optional

3.12     Subsurface Drainage Network – Optional

3.13     Output Files – Required