Trench Drain vs Roots
Water flows diagonally from the top left of my backyard to the bottom right (which is according to the natural flow for all the houses in a 2 block radius). However, the negative slope towards my foundation was not good, so I reversed the slope for the first 10 feet away from my foundation. Where the two slopes meet (10ft out), I've already dug a trench, to be filled with gravel later.
My plan was to continue the trench drain around the right side of my house, and out to the street, by extending the trench that far.
However, I've run into roots (which I've now cut out of the trench area) from a few of my neighbors' trees (see the right side of my diagram).
I figured I could change my original plan of having the trench drain continue along the right side of my house and instead just carry the backyard water to the front via a PVC pipe which won't become a victim to the roots.
However, there is still the possibility of tree roots seeking out the backyard trench drain, which would simply be gravel wrapped in landscaping fabric topped with rocks. What can I do to protect my backyard trench drain from root invasion?
Also, I'm wondering instead of trying to have a long PVC pipe to go towards the front of the house (and also trying to figure out how to get the water from the trench drain to actually flow into a PVC pipe), if maybe I should create a dry well in the middle of my backyard instead, and let the water disburse there? My soil is mostly clay, so absorption would not be fast, but I've tested it out and a bucket of water is absorbed within a few minutes.
But I guess I'd also have to protect a dry well from tree roots as well.
Thanks for whatever suggestions you can provide.
I've enclosed a diagram, because my backyard is all dug up now and a picture would not be as helpful.