Thanks Michael for the response. Therefore the net buoyancy force is the solid (soil) minus the fluid (water) density and it happens in a long span of time. In this case, there will be two extreme cases, one without the buoyancy effect (newly installed pipeline) and with the net buoyancy effect (after a long period of time) where the water sips in the soil.


Please correct if my statement is interpreted right.

Cheers!!!