https://www.scribd.com/document/34604398/Stormwater-as-a-Resource-How-to-Harvest-and-Protect-a-Dryland-Treasure Permaculture: A Designers’ Manual, by Bill Mollison. Tagari, 1988. This is an excellent guide to integrated, sustainable design. See Chapters 7 and 9 for water-harvesting earthworks....