Investigation of the Influence of Hydrogel Amendment on the Retention Capacities of Green Roofs
PBN-AR
Instytucja
Wydział Infrastruktury i Środowiska (Politechnika Częstochowska)
Informacje podstawowe
Główny język publikacji
en
Czasopismo
Ecological Chemistry and Engineering S (15pkt w roku publikacji)
ISSN
1898-6196
EISSN
2084-4549
Wydawca
Towarzystwo Chemii i Inżynierii Ekologicznej
URL
Rok publikacji
2018
Numer zeszytu
Iss.3
Strony od-do
373-382
Numer tomu
Vol.25
Identyfikator DOI
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Autorzy
(liczba autorów: 4)
Pozostali autorzy
+ 1
Słowa kluczowe
en
green roof
retention capacity
stormwater management
substrate
hydrogel
Open access
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Creative Commons — Uznanie autorstwa-Niekomercyjne-Bez utworów zależnych
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Streszczenia
Język
en
Treść
Progressive economic development as well as urbanisation influence the characteristics of the stormwater runoff. Progressive sealing of drainage basin surface prompts the decrease of rainwater infiltration, thus increasing the runoff intensity. This results in an increase of flood risk. Thus, in urban areas the sustainable urban drainage systems (SUDS) are used in addition to the traditional sewer systems. The examples of SUDS strategy are, inter alia, the roofs covered with vegetation (the green roofs). The paper presents the results of research of retention capacities of 4 diverse green roof models with following growing media: (1) the typical green roof substrate without any additions, (2) the substrate with addition of about 1 % by weight of hydrogel (the cross-linked potassium polyacrylate), (3) the substrate with addition of about 0.25 % by weight of hydrogel, (4) the substrate with addition of expanded clay and perlite. The models did not have the vegetation layers in order to explore only the retention capacities of drainage layers and substrates. The aim of the first part of research was to investigate the retention capacities of green roof models after 1, 2, 6, 8 and 10 antecedent dry days. In the case of 1 and 2 antecedent dry days the best medium retention capacity had green roof model 2 (with substrate with addition of 1 % by weight of hydrogel), and the weakest medium retention capacity had green roof model 1 (without any additions). In the cases of precipitations which occurred after 6 as well as 8 and 10 antecedent dry days the best retention capacity had green roof model 3 (with addition of about 0.25 % by weight of hydrogel). The weakest retention capacity had in these cases green roof model 4 (with addition of expanded clay and perlite). The aim of the second part of research described in the paper was to investigate the retention capacities of green roof models during precipitations that occurred after long antecedent dry periods of time (34, 59 and 106 antecedent dry days). The substrates and drainage layers were air-dry directly before precipitations. The best retention capacity had in this case green roof model 3 (with the substrate with addition of about 0.25 % by weight of hydrogel). The second largest retention capacity had model 2 (with the substrate with addition of about 1 % by weight of hydrogel). The definitely weakest retention capacity had model 4 containing the substrate with addition of expanded clay and perlite. The results may indicate that the efficacy of hydrogel decreased over time probably due to its decay under the influence of solar radiation.
Cechy publikacji
original-article
Inne
System-identifier
59540
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