Subsurface Drainage:Subsurface Drainage

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The SUPERLINK (Ji, 1999) model has been included in GSSHA to simulate subsurface drainage networks. The SUPERLINK model can be used to simulate urban subsurface drainage systems or agricultural tile drains. Systems can have both tile drains and surface inlets. Features include multiple networks, looped networks, discharge back on the overland and to channels. The SUPERLINK method and it's implementation is described in detail here: SUPERLINK TN. SUPRLINK is implemented in GSSHA versions 5.1 and higher, and supported by WMS versions 8.3 and higher. To use SUPERLINK include the STORM_SEWER card with the name of the SUPERLINK pipe network file. The SUPERLINK pipe network file, .spn file, describes the SUPERLINK network, including the network, the connectivity of the network, physical attributes of drains, pipes, etc. The format of this file is very similar the channel input file, .cif file, used to described the stream network. When simulating tile drain, the connectivity between the tile network and the groundwater modeling grid is specified with the GRID_PIPE card, which is used to define the grid pipe file, .gpi file. This file format is very similar to the grid stream file, .gst file, used to describe the stream network connectivity to the overland flow grid. The required inputs are described in: SUBSURFACE DRAINAGE REPORT. This report have not yet been approved for release. When approved for release this link will be made active.

GSSHA User's Manual

19 Subsurface Drainage