Rainwater Harvesting and Runoff Management

The most common example of rain water harvesting is capturing runoff from a roof and using it for indoor water needs. Dry farming (farming without irrigation other than rain) is not a major focus of this book but it certainly qualifies as an creative use of rain and is common throughout the world. Other applications include capturing rain runoff to flush accumulated irrigation salts from the soil, and even using runoff to generate hydroelectric power!