Attributes: BILK [-] (node wise), BILE [-] (element wise)

Only the integer part of the value (columns 1 to 14) is interpreted. The list of numbers starts in column 17. Each closed list of numbers represents a mass balance group.

BILK requires nodes which have a fixed potential head and / or a leakage rate and / or a seepage boundary condition. As a result the mass flow rates / leakage rates / seepage rates at the specified nodes and the total mass flow rate are listed in the output file. Using different lists it is possible to define several balance areas (groups). The modules ignore the nodes in the list which do not have the necessary boundary condition. The different balance areas are then identified by the group number that is printed to the output file.

BILE requires elements which have a leakage boundary condition. As a result, the leakage rates for the specified elements and the total mass flow rate are listed in the output file. Using different lists it is possible to define several balance areas (groups). The modules ignore the elements in the list which do not have a leakage boundary condition. The different balance areas are then identified by the group number which is printed to the output file.

Balance areas are required where several calculations are compared by mass balances for certain boundaries (potential head), receiving water courses or element leakage areas.