The biggest factor for trout is sufficient oxygen and water temps. mostly below 70degrees in your pond. If you are trying to get them to spawn in an artificial stream atleast it will be in the late winter early spring for the rainbows and late fall or early winter for brookies, so temp won't be a problem.
I think the first challenge is to be able to have them survive in your pond during the summer months, if thats successful then you can plant some RBT in the artificial stream in the fall and trap them out in the spring so you can return them to the pond.
There's alot of different ways of experimenting so read up all you can and make a plan, but remember things don't always go as planned, or as the pond boss say'in goes, "It all depends".
