You can purchase large staple shaped hold downs at the Hone Depot.
Yes, this should work in a drywell.
No from my experience. Water sits on top of this for days and doesn't pass through. You could line a swimming pool with this stuff.
I would use a heavier product on a hill side. Watch for runners to come up around mesh, grass tries hard to survive. You can always treat with Roundup or a garden grade 20% vinegar.
depends on if you secure it
I use a heavy duty plastic to solarize or warm soil. You can buy the heavy duty contractor bags and cut them on the seam to fit your space.
We did, yes, and so far no grass or weeds has poked through - it has been a few weeks.
Yes, The fabric is not as strong as some other brands and models. But if your supporting soil is firm and the rocks don't cut through the fabric it will work well to keep the soil in place and block plant growth. I would recommend at least two layers of this particular cloth under rock.
Both sides are the same