Factors affecting the hydraulic performance of infiltration based SUDS in clay

Britta Bockhorn, Knud Erik S. Klint, Luca Locatelli, Young-Jin Park, Philip J. Binning, Ed Sudicky, Marina Bergen Jensen

    Research output: Contribution to journalArticleResearchpeer-review

    20 Citations (Scopus)

    Abstract

    The influence of small scale soil heterogeneity on the hydraulic performance of infiltration based sustainable urban drainage systems (SUDS) was studied using field data from a clayey glacial till and groundwater simulations with the integrated surface water and groundwater model HydroGeoSphere. Simulations of homogeneous soil blocks with hydraulic properties ranging from sand to clay showed that infiltration capacities vary greatly for the different soil types observed in glacial till. The inclusion of heterogeneities dramatically increased infiltration volume by a factor of 22 for a soil with structural changes above and below the CaCO 3 boundary. Infiltration increased further by 8% if tectonic fractures were included and by another 61% if earthworm burrows were added. Comparison of HydroGeoSphere infiltration hydrographs with a simple soakaway model (Roldin et al., 2012) showed similar results for homogeneous soils but indicated that exclusion of small scale soil physical features may greatly underestimate hydraulic performance of infiltration based SUDS.

    Original languageEnglish
    Pages (from-to)125-133
    Number of pages9
    JournalUrban Water Journal
    Volume14
    Issue number2
    DOIs
    Publication statusPublished - 7 Feb 2017

    Keywords

    • Infiltration
    • stormwater modelling
    • SUDS

    Programme Area

    • Programme Area 5: Nature and Climate

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