Let s Talk About Crushed Stone

   / Let s Talk About Crushed Stone #21  
Theoretically, your half perforated pipe sounds good, but unless it is a wedge fit in the ditch, water will go down along side it. That to me says you'll have water half the diameter of the pipe, or lowest level of the hole/slots for it to enter, (1-1/2" to 2" deep) deep in the bottom of the ditch. Water will follow the path of least resistance. Depending on type of soil at the bottom of the ditch, being we have yellow clay here approx. 8" to 12" below the surface, it may penetrate a few inches, and sort of seal itself off. but most of the high volume of the surface water you're trying to get rid of will go out the fully perforated pipe, and/or gravel on the bottom. The rest will just perk out naturally.

I should have mentioned, at the ends of the runs of perforated pipe, I add a piece of solid wall pipe back a ways from the outlet, and cover with dirt to force water out the solid. I'll put a piece of cloth right on top of the perforated, just past the point of where the solid attaches, to keep any dirt from being drawn in.
 

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