Rain

Size a rainwater catchment and storage tank to carry a vegetable garden through the dry months — anywhere on earth.

Location
Detecting your location…
 
Annual rainfall
mm / year, 10-yr avg
Driest month
 
Peak ET₀
mm in the hottest month
Growing-season deficit
mm of irrigation needed

Inputs

70
100
10,000 L
Garden practice
 
Modelling

Verdict

Calculating…
Self-sufficient years
Total shortfall, worst year
End-of-summer reserve
Overflow lost to ground

Tank level through the year

One line per year over the last decade, day by day — the gold line is the current year, up to today. Where lines hit the bottom, the garden ran dry.

Roof × tank tradeoff

Click anywhere on the field to pick a combination. Darker = more reliable across recent years.

Monthly water balance

Rainfall captured by the roof versus what the garden draws, averaged across the period.