Rainwater storage in urban environments using green roofs

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Nelson Andrés López Machado http://orcid.org/0000-0002-3111-7952
Christian Gonzalo Domínguez Gonzalez http://orcid.org/0000-0003-2971-7163
Wilmer Barreto http://orcid.org/0000-0002-1861-0742
Néstor Méndez http://orcid.org/0000-0003-1300-5049
Leonardo José López Machado http://orcid.org/0000-0002-1562-0662
María Gabriela Soria Pugo http://orcid.org/0000-0001-9045-0870
Ronnie Xavier Lizano Acevedo http://orcid.org/0000-0002-9490-8882
Vanessa Viviana Montesinos Machado http://orcid.org/0000-0002-5355-5099


This article discusses the use of green roofs as rainfall water storage in its soil matrix. The methodology is analytical based on mathematical models, where runoff produced in an urban area is compared with current conditions of ordinary roofs with ceramic or bituminous materials as the original scenario, against another where green roofs are used. The study area is located in the Palavecino municipality of Lara state in Venezuela, in the flood zone of Quebrada Tabure. In this research, a quantitative comparison of the direct runoff hydrographs of the proposed scenarios was used, obtaining as a main result the reduction of runoff between 60% and 80% according to the period of return. An interesting point of this research was the incorporation of the routing of hydrographs on the roofs, reducing even more the peak flow over 90%, and delaying the peak time of the generated hydrographs between 10 and 12 minutes while the total duration of the hydrographs increase more than three times.
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