In SPRING crosslinking of water systems is possible. By default, there is an automatic split into equal proportions in the flow direction of the water course (distribution 50:50). If the user wants to define the proportions by himself, he can do that by using the file sitra_vsys.txt. The amounts can be distributed as a percentage, or a maximum transfer amount is defined.

The file has the following structure

 

#################################################

# A-Bach -> Umlaufgraben A-Bach #

#################################################

#

# CROSSLINK SOURCE_NODE TARGET_NODE PERCENT VALUE

# Transferring 25% of the flow from node 208 to node 2856

# Rest to other branches of node 208

CROSSLINK 208 2856 PERCENT 25.0

#

#######################################

# B-Bach -> B-Entlastungsgraben #

#######################################

#

# CROSSLINK SOURCE_NODE TARGET_NODE QMAX VALUE

# Transferring of max. 17500.0 m3/ZE from node 7713 to 7712

# Rest to other branches of node 7713 divide evenly

#

#comment

CROSSLINK 7713 7712 QMAX 17500.0

 

The lines starting with # are comment lines. The specification:

CROSSLINK 208 2856 PERCENT 25.0

means, that 25% amount of water of node 208 are transferred to node 2856. The remaining 75% will be given to other existing branches at node 208.

Die Angabe:

CROSSLINK 7713 7712 QMAX 17500.0

means that the node 7713 gives a maximum amount of water of 17,500 m³/a to node 7712. The remaining amount present is distributed equally between the other existing branches at node 7713.

 

Once the file sitra_vsys.txt is available in the working directory of the corresponding project, it will automatically read in the flow calculation with the module SITRA (steady-state or transient calculation).

 

Transient input file