Critical Review of Environmental Forensic Techniques: Part I

Morrison, Robert

doi:10.1006/enfo.2000.0017

Cited by 58 publications

(25 citation statements)

References 146 publications

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“…In this paper, Morrison discussed commonly used environmental forensic techniques and their possible applications so that readers can decide which technique is most appropriate for their cases. A more in-depth review of these techniques can be found in Morrison (2000b;c).…”

Section: Contaminant Transport Inversion Methodsmentioning

confidence: 99%

State of the Art Report on Mathematical Methods for Groundwater Pollution Source Identification

2001

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The reliable assessment of hazards or risks arising from groundwater contamination problems and the design of ecient and eective techniques to mitigate these problems require the capability to predict the behavior of chemical contaminants in¯owing water. Most attempts at quantifying contaminant transport have relied on a solution of some form of a well-known governing equation referred to as advection-dispersion-reaction equation. To choose an appropriate remediation strategy, knowledge of the contaminant release source and time release history becomes pertinent. As additional contaminated sites are being detected, it is almost impossible to perform exhaustive drilling, testing, and chemical ®ngerprint analysis every time. Moreover, chemical ®ngerprinting and site records are not sucient to allow a unique solution for the timing of source releases. The purpose of this paper is to present and review mathematical methods that have been developed during the past 15 years to identify the contaminant source location and recover the time release history.# 2001 AEHS

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Section: Contaminant Transport Inversion Methodsmentioning

confidence: 99%

State of the Art Report on Mathematical Methods for Groundwater Pollution Source Identification

2001

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“…Suggs et al (2002) describe this laboratory component as "chemical fingerprinting." A limited review of some other types of environmental forensic investigation, such as underground storage tank corrosion modeling and the use of aerial photography, may be found in Morrison (2000aMorrison ( , 2000b.…”

Section: Environmental Forensic Investigations By the Nsw Epamentioning

confidence: 99%

Identification and Matching of Environmental Samples for Regulatory Purposes: A Systematic Approach

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Fuller

et al. 2004

Environmental Forensics

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“…Reviews of time inversion methods for 'source identification inverse problems' can be found in Morrison [25][26][27], Atmadja and Bagtzoglou [4,5], Bagtzoglou and Atmadja [7,8]. However, the widespread use of some of these methods is still limited due to their non-conventional nature.…”

Section: Introductionmentioning

confidence: 97%

Anti-diffusion and source identification with the ‘RAW’ scheme: A particle-based censored random walk

2009

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This paper presents a novel methodology for time reversal in advective-diffusive pollutant transport in groundwater systems and other environmental flow systems (specifically: time reversal of diffusive terms). The method developed in this paper extends previous particle-based approaches like the Reversed Time Particle Tracking Method of Bagtzoglou [6]. The reversal of the 'diffusive' and/or 'macrodispersive' component of pollutant migration is especially under focus here. The basis of the proposed scheme for anti-diffusion is a continuous time, censored, non-local random walk capable of tracking groundwater solute concentration profiles over time while conserving the (reverse) Fickian properties of the anti-diffusing particle cloud in terms of moments. This scheme is an alternative to the direct solution of the eulerian concentration-based diffusion PDE, which is notoriously unstable in reverse time. Our analysis leads to the conclusion that an adaptive time stepping scheme-with decreasing time step-is necessary in order to maintain a constant amount of anti-diffusion (the reverse form of Fick's law). Specifically, we study the relations between the following parameters: time step evolution vs. time (or vs. number of steps); variance evolution (decrease rate); total time (or number of steps) required to reach a fully anti-diffused solution. The proposed approach is shown to be quite efficient; typically, for every ten time steps, one to two orders of magnitude reduction of the dispersion width of the plume can be attained. Furthermore, the method is shown to be asymptotically exact for reverse Fickian diffusion. The method is applied with success to several situations involving the diffusive transport of a conservative solute in the following cases: (i) Single source recovery in onedimensional space with constant diffusion parameters (this example serves as a validation test for the theory); (ii) Single source recovery in two-dimensional space with constant isotropic diffusion (this example also serves as a test for the theory); (iii) Multiple source recovery R. Ababou (B) · A. Mallet 123 42 Environ Fluid Mech (2010) 10:41-76in two-dimensional space, assuming isotropic diffusion. It is expected that the methodology tested in this paper is applicable more generally to complex environmental pollution problems involving multiple sources, anisotropic hydrodynamic dispersion, and space-time variable advection-diffusion flow systems; the modeling of reverse diffusion/dispersion in such systems is currently under investigation.

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Critical Review of Environmental Forensic Techniques: Part I

Cited by 58 publications

References 146 publications

State of the Art Report on Mathematical Methods for Groundwater Pollution Source Identification

State of the Art Report on Mathematical Methods for Groundwater Pollution Source Identification

Identification and Matching of Environmental Samples for Regulatory Purposes: A Systematic Approach

Anti-diffusion and source identification with the ‘RAW’ scheme: A particle-based censored random walk

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