When you want to calculate how big your dam should be – use this simple formula. 4 units of storage for every 1 unit of required water
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Last updated: April 2026 | Author: Angus Hughson, Big Ditch Dam Building Company 📋 Quick Answer Australia faces recurring drought cycles, with inland NSW, QLD, and SA most severely affected. Farm dams are the most effective on-property drought response — providing water security independent of town supply or rainfall. Size your dam for 2–3 years …

