Rainfall runoff from a Polyhouse

Commercial polyhouses are typically large and require a fair bit of water for watering the plants even in the rainy season as the rain cannot directly fall on the plants. Even a 30mm rain on a polyhouse of 1 acre (about 4000sqm) can result in a runoff of 108,000 litres (this is  equivalent to the daily water requirement of 200 families at about 500 litres per family per day). The runoff water is very clean and must certainly be put to good use. The 2 short videos capture the runoff from one such polyhouse after a short shower - so as to highlight potential for rainwater harvesting