French to English Tech/Engineering Construction / Civil Engineering piping and underground installations

Non, le somo au sol n'est pas un drain et il récupère les eaux résurgentes par contre, les autres eaux sortent par des somo séparés...
No, the pipe on the ground is not a drain pipe, instead it recovers "X" water, the other water goes out of separate pipes...

And again:

Le somo au sol évacue les eaux résurgentes de la paroi gunitée.
The tube on the ground diverts the XXX waters XXX from the gunite wall.


Context:
This refers to plastic tubing and piping fitted in the underfloor space of a spa building.
Can anyone confirm whether "les eaux résurgentes" has a technical translation or whether it is a general term referring to any water which re-emerges?

Many thanks!