corn18
Thinks s/he gets paid by the post
- Joined
- Aug 30, 2015
- Messages
- 1,890
I'm thinking it might still be a fast flowing river. Your drain collects the water and fills the basin. The basin fills and then overflows at the rate water is added to it. There will be a delay equal to the time it takes for the basin to fill before the river develops, but it seems that after that pretty much the same thing.
Is it the redirection of the water and/or the time it takes for the water to move from above you, through your yard (via the new drain and pit) and into your neighbor's yard that you're counting on to eliminate the "fast flowing river?"
The basin acts like a reverse nozzle. The water coming out of the 4" pipe shoots into the basin. It expands and slows down. The basin is 6 ft in diameter and sloped to drain downhill. When the water comes out of the basin, it is spread over a much wider area, but the volume is the same. I suspect once it's out of the basin and into my neighbor's yard, it will just regroup and reform a fast flowing stream until it hits the next neighbor's yard that has a french drain as well.
All I know is that I was out throwing the ball for my dog today and didn't have to give her a both when we were done. That has never happened the night after a big storm, so the french drain is working for me.