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SIMULATED, NOT MEASURED. A first-principles rainwater tank sizing rule computed for a 100 m2 dry-season vegetable field (78.2 m3 demand), 800 mm mean rainfall, gamma/Dirichlet stochastic rainfall, CV 0.20-0.70. Required storage is set by dry-season demand (66-78 m3); reliability is bought with catchment area (ratio ~1.5 for 80%, ~2.0 for 90%); the system stops closing at CV approx 0.33 at ratio 1.5 and approx 0.52 at ratio 2.0. Includes simulation script and full results.
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William Alexander Aldred (2026) studied this question.
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