作者: S. P. Herzog , C. P. Higgins , J. E. McCray
DOI: 10.1061/(ASCE)EE.1943-7870.0001012
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摘要: AbstractThe hyporheic zone (HZ) has the potential to mitigate nonpoint source pollution that threatens urban streams, but limited flows and inefficient interchange typically constrain its water quality improvements. This paper presents coordinated streambed hydraulic conductivity (K) modifications, termed Biohydrochemical Enhancement Structures for Streamwater Treatment (BEST), efficiently drive interchange, attenuating nutrients, metals, pathogens. Numerical models consisted of sandy HZ with high low K media components, variable slope in situ sediment K. BEST contaminant mitigation was estimated using flow residence time (RT) simulations removal rate constants from literature specific porous media. Hyporheic improved, whereas mean RT decreased approximately linearly increasing Despite vast differences RT, relatively consistent among which reaction scale...