Operation of smart roof weir
The system measures air and water temperature and the height of water level in the water storage layer. The rooftop weir is connected to an online dashboard that records measurements, combines them with weather forecasts and thus controls the weir. By default, the weir is closed. This allows all rainwater to be stored in the system during normal precipitation. This water will evaporate and/or be absorbed by vegetation. When rain comes, the roof weir will measure in advance whether the expected precipitation can be stored. If the precipitation forecast is more than can be stored, then the system will drain the excess expected precipitation before the shower. The roof weir allows regulated discharge of excess water for precipitation at times when there is no waterlogging in the sewer system yet. Once the precipitation starts, there is enough space in the system to fully store this precipitation, which will relieve the sewer system.
