Total discharge in line drains

Hello, 

I am not quite sure how should I calculate the total discharge in a line drain on plaxis 3D. Each drain is divided in several segments depending on the meshing, each segment have 3 nodes with the same Total discharge (in the drain table in the Plaxis Output). If I want to compute the total discharge of a line drain, should I add up the value for each node of the drain or the value of each segment?. 

Regards,