Transport of Escherichia Coli and solutes during waste water infiltration in an urban alluvial aquifer

J.W.A. Foppen, M. van Herwerden, M. Kebtie, A. Noman, J.F. Schrijven, P.J. Stuijfzand, S. Uhlenbrook

    Research output: Contribution to JournalArticleAcademicpeer-review

    Abstract

    Recharge of waste water in an unconsolidated poorly sorted alluvial aquifer is a complex process, both physically and hydrochemically. The aim of this paper is to analyse and conceptualise vertical transport mechanisms taking place in an urban area of extensive wastewater infiltration by analysing and combining the water balance, the microbial (Escherichia coli) mass balance, and the mass balance for dissolved solutes. For this, data on sediment characteristics (grain size, organic carbon, reactive iron, and calcite), groundwater levels, and concentrations of E. coli in groundwater and waste water were collected. In the laboratory, data on E. coli decay rate coefficients, and on bacteria retention characteristics of the sediment were collected via column experiments. The results indicated that shallow groundwater, at depths of 50 m below the surface, was contaminated with E. coli concentrations as high as 10
    Original languageEnglish
    Pages (from-to)1-16
    JournalJournal of Contaminant Hydrology
    Volume95
    DOIs
    Publication statusPublished - 2008

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