Visualisation of clogging in green infrastructure growing media

Zhangjie Peng, Jill Edmondson, Ross Stirling, Daniel Green, Richard Dawson, Simon De-Ville, Virginia Stovin

Research output: Contribution to journalArticlepeer-review

1 Citation (Scopus)
43 Downloads (Pure)

Abstract

Growing media in green infrastructure (GI) designed for stormwater management plays a critical role in providing hydrological benefits. However, sediment deposition by urban stormwater can cause clogging and reduce the infiltration capacity. This study introduces a new approach to characterise the impact of clogging of GI that uses fluorescent tracer particles. Results are compared for two contrasting growing media: Grey to Green Substrate (G2G) and Marie Curie Substrate (MCS). Results showed that most sediment particles were retained on the surface of both growing media, and surface clogging in G2G caused a decrease in infiltration capacity. Sediment vertical movement was observed in both growing media, but particles travelled deeper in MCS. Vertical sediment movement is influenced by the growing media’s pore size distribution, and a high clogging risk is expected in growing media with a pore size distribution that is close to the particle size distribution of the incoming sediment particles.
Original languageEnglish
Pages (from-to)477-486
Number of pages10
JournalUrban Water Journal
Volume20
Issue number4
Early online date24 Feb 2023
DOIs
Publication statusPublished - 21 Apr 2023

Keywords

  • Clogging
  • fluorescent tracer particles
  • green infrastructure
  • growing media
  • visualisation

ASJC Scopus subject areas

  • Geography, Planning and Development
  • Water Science and Technology

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