learn.howToCalculate
learn.whatIsHeading
Rainwater harvesting collects precipitation for irrigation, toilet flushing, or emergency use. It reduces groundwater demand and stormwater runoff.
الصيغة
Calculate: Annual collection = Catchment area × Annual rainfall × Collection efficiency
دليل خطوة بخطوة
- 1Calculate: Annual collection = Catchment area × Annual rainfall × Collection efficiency
- 2Roof collection: 90% efficiency, pavement: 70%, storage needed for dry periods
- 31000 m² roof, 1 m rain: 700-900 m³ water available
أمثلة محلولة
الإدخال
Residential roof 100 m², annual rainfall 500 mm
النتيجة
Annual collection ~45 m³ (45,000 L), covers 30-40% irrigation needs
Location dependent
أخطاء شائعة يجب تجنبها
- ✕Under-sizing tank for dry season needs
- ✕Forgetting overflow management (can cause flooding)
أسئلة شائعة
Is rainwater safe to drink?
No without treatment. Suitable for irrigation, toilet, washing after basic filtration.
How large must storage tank be?
Rule of thumb: volume for one dry month. Location's dry season determines sizing.
هل أنت مستعد للحساب؟ جرب الآلة الحاسبة Rainwater Harvest المجانية
جربه بنفسك →