Articles

Green roof runoff reduction under different substrate depths and vegetation covers: the effect of initial substrate moisture conditions and total rainfall depth

Article number
1189_108
Pages
541 – 544
Language
English
Abstract
In this study, the effects of various vegetation covers and green roof substrate depths were evaluated in order to systematically analyze the relationship between runoff reduction, initial substrate moisture conditions, and total rainfall depth.
In addition, a mathematical expression was formulated to effectively describe this relationship.
The observed total runoff depth reduction ranged between 2 and 100%. Higher runoff reductions were observed in the deeper substrates (16 cm) combined with xerophytic vegetation cover, as well as in cases with low initial substrate moisture content, and during smaller rainfall depths.
The results revealed that vegetation cover and substrate depth may affect runoff reduction through their effect in the green roofs’ water balance.

Publication
Authors
K.X. Soulis, N. Ntoulas, P.A. Nektarios, G. Kargas
Keywords
hydrology, substrate water content, irrigation, lysimeter
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