Pool Surround Drainage Questions

[Gynot]

Hi, my wife and I have been dedicating one main improvement project per year for our backyard for the past couple years. The most recent is having a new retaining wall and slab built in my back yard. It's about 8' wide x 40' long. I live in a typical track home here in SoCal and a corner lot at that. What we're doing is creating additional deck/patio space for chairs and what-not to the back side of our pool. When the lot was built no drainage to the street was established, so it's too late and way too costly to consider that with all the concrete to go under and neighbors yards to go through, so forget that. What I need to come up with is a way for the winter rains and excess pool water to drain off to rather than collecting and being trapped on the new slab. If there's no drainage the the new area will fill very quickly.

I've been considering the long grate type of drain that would run the length of the slab. This way it could look nice and be effective. Now is a great time to dig a trench for the channel since it's all still dirt then cement around it. The problem is that I haven't seen any that has holes in it that could allow water to drop straight down into the earth. I figured that it could drop into crushed stone a few inches below the grate. The grate would be set to the back most part of my slab, correct? Which way would best make sense for the slab to slope, back or front?

Would this work? Other ideas?

I have some pics if that helps, but not sure how to post them here. There is no link for "Pictures & Albums" in my UCP.

Thanks for any help.
Tony