Tucson, Arizona author Brad Lancaster wrote the definitive books Rainwater Harvesting for Drylands and Beyond, Volumes 1 and 2 (Rainsource Press, 2006 and 2007). At Harvesting Rainwater, Lancaster offers resource lists from his books, with links where applicable, covering many other topics to help you plan a sustainable landscape, such as sun angles and passive solar design.
Clever Gardening Technique
Use Solar Calculators
Many websites exist that can help you determine solar angles when planning your landscape. There are also apps available for download to your phone. Search on "solar angle" or "solar calculators".