NE South Dakota Clark, SD | soilnotdirt - 3/12/2024 15:11
If you have intakes open to the air, yes water will bubble up in high rainfall. But all underground, I think the upper area drains last.
The lower ground will drain last. Tile works on kind of a pressure based theory. Higher elevation has more "pressure" so it drains first. Kind of like pumping water up into a water tower to get better pressure. If you have a submerged outlet in a ditch, the water table will only drain to the level of the water over the outlet. If the ditch level drops, then the water table will drop to the same level.
I have seen this in fields where there was not enough planning when spot tiling. Put in a 6 inch main to drain 7-8 acres and then a few years later you realize the wet spot moved up the "hill" a little further. Add another 5-6 acres to the system and now the low ground drys out slower because the upper ground drains first because the main is over loaded. I have yet to hear anyone say they regret putting in too big of a main or spacings that were too narrow. |
Adding tile
