Hi you can had a "LIQUID BOUNDARIES FILE" and prescribe what ever you want.
exemple of liquid boundaries:
#
# CONCENTRATION EN ENTREE
#
T CG(2,1) CG(2,2) CG(2,3) CG(2,4) CG(2,5) CG(2,6) CG(2,7) CG(2,8) CG(2,9) CG(2,10)
s g/l g/l g/l g/l g/l g/l g/l g/l g/l g/l
0 0 0 0 0 0 0 0 1.33E-03 1.33E-03 1.33E-03
900 0 0 0 0 0 0 0 1.33E-03 1.33E-03 1.33E-03
1800 0 0 0 0 0 0 0 1.33E-03 1.33E-03 1.33E-03
2700 0 0 0 0 0 0 0 1.34E-03 1.34E-03 1.34E-03
3600 0 0 0 0 0 0 0 1.36E-03 1.36E-03 1.36E-03
4500 0 0 0 0 0 0 0 1.37E-03 1.37E-03 1.37E-03
5400 0 0 0 0 0 0 0 1.37E-03 1.37E-03 1.37E-03
=> Ten classes of sediments on the boundary two are precribe
The code have been modified a little bit to do that ... but the idea is here ...
cheers
Jeremy