The reuse of rainwater drains by using «green roofs»

The article is devoted to the possibilities of purification of rainwater drains by using "green roofs" and their further using for domestic needs: watering the garden and the roof itself; toilets washing; laundry. To collect rainwater it is proposed to use the storage tank. The basis of the calculations are taken by the German method Wilo, adapted to the conditions of Ukraine. A significant contribution to this methodology is taking into account the uneven distribution and precipitation throughout the whole year and the lack of costs for watering the garden and roof in the winter period. Purified rainwater from "green roofs" can be assembled into tanks and used for technical needs. For collecting rain water from an intensive flat roof with an area of 200 m2 for the family of 4 people a tank of 5 m3 is required. In this case, the total needs for the house and watering the garden are 111 m3 / year, and daily needs - 0,341 m3 / day.