Towards natural water cycle in urban areas : Modelling stormwater management designs

Ambika Khadka*, Teemu Kokkonen, Tero J. Niemi, Elisa Lähde, Nora Sillanpää, Harri Koivusalo

*Tämän työn vastaava kirjoittaja

Tutkimustuotos: LehtiartikkeliArticleScientificvertaisarvioitu

15 Sitaatiot (Scopus)
133 Lataukset (Pure)

Abstrakti

Urbanization modifies the natural water cycle particularly by reducing the water storage capacity. We analysed the storage capacity of three stormwater management designs in south-western Finland to demonstrate how an urban catchment releases stormwater and how storage contributes to flood resilience. The analysis relies on EPA SWMM5.1 simulations of water balance for a seven-month period including two extreme rain events during the summer and autumn. The enhanced storage capacity provided by the designs increased resilience against flooding and released stormwater with slower rates leading to reduced peak flows. Even the design with the least storage (10% LID coverage) was efficient at regulating floods due to controlled flow in a vegetated swale, whereas the design with the highest storage capacity (60% LID coverage) demonstrated the possibility of restoring nearly natural water cycle in urban catchments. The study suggests storage capacity can act as a flood resilience indicator directly linked with the physical catchment characteristics.

AlkuperäiskieliEnglanti
Sivut587-597
Sivumäärä11
JulkaisuUrban Water Journal
Vuosikerta17
Numero7
Varhainen verkossa julkaisun päivämäärä25 jouluk. 2019
DOI - pysyväislinkit
TilaJulkaistu - 8 elok. 2020
OKM-julkaisutyyppiA1 Alkuperäisartikkeli tieteellisessä aikakauslehdessä

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