Rainwater Harvest کا حساب کیسے لگائیں
Rainwater Harvest کیا ہے؟
Rainwater harvesting collects precipitation for irrigation, toilet flushing, or emergency use. It reduces groundwater demand and stormwater runoff.
فارمولا
Calculate: Annual collection = Catchment area × Annual rainfall × Collection efficiency
مرحلہ وار گائیڈ
- 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
حل شدہ مثالیں
ان پٹ
Residential roof 100 m², annual rainfall 500 mm
نتیجہ
Annual collection ~45 m³ (45,000 L), covers 30-40% irrigation needs
Location dependent
عام غلطیاں جن سے بچنا ہے
- ✕Under-sizing tank for dry season needs
- ✕Forgetting overflow management (can cause flooding)
اکثر پوچھے جانے والے سوالات
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.
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