2001
DOI: 10.1111/j.1745-6592.2001.tb00751.x
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Funnel‐and‐Gate Performance in a Moderately Heterogeneous Flow Domain

Abstract: The funnel‐and‐gate ground water remediation technology (Starr and Cherry 1994) has received increased attention and application as an in situ alternative to the typical pump‐and‐treat system. Understanding the effects of heterogeneity on system performance can mean the difference between a successful remediation project and one that fails to meet its cleanup goals. In an attempt to characterize and quantify the effects of heterogeneity on funnel‐and‐gate system performance, a numerical modeling study of 15 si… Show more

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Cited by 21 publications
(14 citation statements)
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“…The performance of biobarriers is tested by model predictions and the breakthrough of reactive and nonreactive tracers measured at selected observation points downstream of the barrier (e.g., Hyndman et al 2000; Dybas et al 2002). These approaches are certainly limited by the occurrence of flow field heterogeneities caused by the aquifer material at a site (Bilbrey and Shafer 2001). Our experiments show that even in the absence of these initial heterogeneities, the occurrence of bioclogging can lead to a heterogeneous flow pattern.…”
Section: Discussionmentioning
confidence: 99%
“…The performance of biobarriers is tested by model predictions and the breakthrough of reactive and nonreactive tracers measured at selected observation points downstream of the barrier (e.g., Hyndman et al 2000; Dybas et al 2002). These approaches are certainly limited by the occurrence of flow field heterogeneities caused by the aquifer material at a site (Bilbrey and Shafer 2001). Our experiments show that even in the absence of these initial heterogeneities, the occurrence of bioclogging can lead to a heterogeneous flow pattern.…”
Section: Discussionmentioning
confidence: 99%
“…Conventionally, two PRB configurations are considered: the continuous barrier and the funnel and gate system. Whereas the hydraulics of funnel-and-gate systems have undergone a degree of scrutiny [18,16,17,3,4], the hydraulic behavior of the simpler continuous barrier system has not been extensively analyzed, although some research has addressed the influence of subsurface heterogeneity in such systems [8,3,4]. A general analytic framework for analysis of either configuration is desirable, as it allows for rapid preliminary testing and sensitivity analysis.…”
Section: Introductionmentioning
confidence: 98%
“…Previous investigators studied flow fields upgradient of interceptor trenches (gates) coupled with low-permeability walls (funnels), using groundwater flow models to identify travel pathways to these coupled configurations (Starr and Cherry, 1994;Sedivy et al, 1999;Bilbrey and Shafer, 2001). These studies considered advection, but not dispersion of contaminants in groundwater.…”
Section: Introductionmentioning
confidence: 98%