Combining pressure transducer and tipping bucket rain gauge to measure high variable runoff rate collected from a green roof

Urban areas are constantly expanding in terms of space and density. It is known that the effect of urbanization is an increase of the area of impermeable surfaces. The infiltration decreases, the surface runoff increases (Baiamonte, Singh, 2017) and the existing stormwater infrastructure may become no more appropriate to face flooding (Berndtsson, 2010). Berndtsson (2010) described the numerous benefits that can be achieved by turning the roofs green through covering them with soil and vegetation. Green roofs i) reduce and attenuate stormwater runoff, which in turn lowers risks of urban floods and improves the urban water balance thus approaching the natural one (Mentens et al., 2006), ii) …