There is a great film on gardening and one mans adventure at trying to solve his low water issues and how he did it. Thank you to Liisa at Liisa's Garden Journey for sharing it. Hope you enjoy. By the way, The name of the film is Back to Eden.
The above link won't be able to connect you to the film, it will connect you to Liisa's blog, one of my favorite bloggers.
Here is the back to eden link: http://backtoedenfilm.com/