Rainwater Harvesting for Drylands and Beyond by Brad Lancaster

Water-Harvesting Calculations

  • Water Harvesting Calculations
    Water Harvesting Calculations, Appendix 3 of Rainwater Harvesting for Drylands and Beyond, Vol. 1
  • Rainwater Harvesting Nomogram for Tucson, Arizona
    This diagram and a ruler can determine optimal sizes of rainwater tanks and/or catchment (roof) surfaces needed to meet desired amounts (in gallons) of available stored rainwater per day throughout year. What’s more, it can do the reverse — determine how much stored rainwater you can have available per day depending upon the size of your tank and/or catchment surface. Reprinted with permission from the Office of Arid Lands, University of Arizona, Tucson.
  • Rainwater Harvesting Calculator for Arizona, New Mexico, and Texas landscapes This calculator helps estimate water needs of landscapes and potential cistern sizing based on your catchment area, water needs of plants, available water storage, and square footage of the landscape.

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