Proposal for technological improvement of green roofs for the Andean tropical climate
Abstract
Risk management through increased surface run-off in urban areas requires intervention from multiple environmental, public health, social and economic approaches. The green infrastructure provides solutions of growing interest for its environmental benefits and potential financial advantage. This article proposes a technological improvement for the adaptation of green roof to the Andean tropical climate, regarding its hydrological behavior, for which an experimental setup was developed with six modules of extensive green roof and one control module (roofing sheet only). The experimental setup allowed the obtaining twenty-one data precipitation events, modifying the configuration of two experimental factors, plant species with six variations and substrates heights with three variations and three additional events to verify the effect of the roof slope variation as a third factor. The obtained data were processed for the calculation of hydrological variables of interest (precipitation, run-off, duration of the event, previous dry time) expressing event characteristics and the hydrological behavior indicators (runoff coefficients based on volume Cv and peak flow Cp and lagtime K) and their statistical analysis, allowed to identify which experimental factors have or do not have significant influence on these indicators. Finally, tools were developed for the simulation of hydrological variables and indicators from external precipitation series and their implementation in a design tool that selects the green roof configurations that present the best hydrological behavior.
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References
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