Green Roof Actual Evapotranspiration

Retention and evapotranspiration are always the same volumes.

Green roof actual evapotranspiration.

The plants in a green roof absorb water through their roots and then use surrounding heat from the air to evaporate the water while some roofs can reach temperatures of up to 90 f in the summertime these two features can allow. The actual solar radiation reaching the earth surface depends by the turbidity of the atmosphere and the presence of clouds which reflect and absorb a large percentage of the radiation. Evapotranspiration is the process of water escaping as vapor. Evapotranspiration why even when discussing it with professional engineers doing building energy modeling they assume that most of the cooling ability of a green roof is through.

Sedum mexicanum mexican stonecrop and disphyma australe new zealand iceplant in a new zealand designed pumice and zeolite based substrate were analyzed to determine daily and hourly et rates under both water abundant and drought stressed conditions. When the subject of energy and green roofs comes up nearly everyone familiar with the topic will tell me that green roofs stay cool because of evapotranspiration. Most of the analysed studies performed a comparison between green roof evapotranspiration plants substrate and bare soil evaporation only substrate. Little research has been completed on evapotranspiration et in green roofs.

In the literature available however it is still not clear how and how much the evapotranspiration affects the performance of a green roof. Evapotranspiration rates determine green roof retention by dr. In order to fill the gap in this research topic this study carries out a review on the cooling effect due to the evapotranspiration process of green roofs. Green roofs reduce the temperature of the building and the surrounding air in multiple ways.