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NATURAL SOURCE ZONE DEPLETION OF LNAPL: A CRITICAL REVIEW SUPPORTING MODELLING APPROACHES
Lari, K.S., G.B. Davis, J.L. Rayner, T.P. Bastow, and G.J Puzon.
Water Research 157:630-646(2019)

A recent review of natural source zone depletion (NSZD) is expanded to establish the key processes required to model NSZD long term. Key challenges to understanding NSZD include the dominance of methanogenic or aerobic biodegradation processes, the potential changeability of rates due to the weathering profile of LNAPL product types and ages, and linkages to underlying bioprocesses. Scales in subsurface simulation and modeling are discussed, and 36 models addressing processes important to NSZD are investigated. The capabilities of models to accommodate more than 20 subsurface transport and transformation phenomena are compared in a table. The applicability of the models to specific site conditions is also discussed.



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