I am planning some landscaping which would see the addition of a small garden in my yard. On two sides it would be surrounded by a crushed rock barrier strip 1' wide. I was hoping to use this 1' wide strip as a psuedo-drywell for the french drains I plan to install.
I don't have major problems with drainage, so the french drains are more for the efficiency of moving water from hardscaped areas to cultivated areas. As such, I don't need, nor do I want, a proper plastic tub buried anywhere.
My plan would be to dig a trench for that barrier strip. It would be 1' wide, of course, and 3' deep. I'd line the sides with landscaping fabric, or some permeable liner material, so water can pass through but soil remains confined outside the trench. Then, I'd simply fill with large crushed rocks to create a porous space for water to accumulate.
Because I haven't done this before, I would like to know if this plan seems reasonable, and what I could do to improve it.