This is looking like an interesting video from Verge Permaculture (It’s long and I’m only just into it). It’s about the benefits of swales in dry climates. We should be doing more of this in Australia.
From the notes below the video (read the rest, too) :
Rob and Takota explore the Tucson swales, an “oasis” in the deserts outside of Tucson, created in the dirty 30’s as part of a Federal make work project, and the swales are still functioning today! Take a detailed video tour of this amazing swale, and learn how to maximize available water even in an extremely dry climate.
Searching for Bill Mollison: Exploring the Tucson swales
Foodnstuff 