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The application of Appropriate Technology

Rainwater Harvesting Spreedsheets

Material to help you with rainwater harvesting design calculations.

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    Rain Water Harvesting Spreadsheet

    This spreadsheet allows the user to size a DRWH storage tank, with a given surface catchment area (m2), and daily demand (litres). The spreadsheet contains rainfall data for Chiapas, Mexico, but this can be easily substituted for rainfall data in any given location. Microsoft Excel Spreadsheet (137KB)