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Natural Attenuation Software (NAS): A computer program for estimating remediation times of contaminated groundwater

By:
, , , ,
Edited by:
Latini G.Passerini G.Brebbia C.A.

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Abstract

This paper describes the development and application of a modeling system called Natural Attenuation Software (NAS). NAS was designed as a screening tool to estimate times of remediation (TORs), associated with monitored natural attenuation (MNA), to lower groundwater contaminant concentrations to regulatory limits. Natural attenuation processes that NAS models include advection, dispersion, sorption, biodegradation, and non-aqueous phase liquid (NAPL) dissolution. This paper discusses the three main interactive components of NAS: 1) estimation of the target source concentration required for a plume extent to contract to regulatory limits, 2) estimation of the time required for NAFL contaminants in the source area to attenuate to a predetermined target source concentration, and 3) estimation of the time required for a plume extent to contract to regulatory limits after source reduction. The model's capability is illustrated by results from a case study at a MNA site, where NAS time of remediation estimates compared well with observed monitoring data over multiple years.

Additional Publication Details

Publication type:
Conference Paper
Publication Subtype:
Conference Paper
Title:
Natural Attenuation Software (NAS): A computer program for estimating remediation times of contaminated groundwater
Volume
11
Year Published:
2004
Language:
English
First page:
185
Last page:
194
Number of Pages:
10
Conference Title:
Tenth International Conference on Development and Application of Computer Techniques to Environmental Studies, ENVIROSOFT X
Conference Location:
Ancona
Conference Date:
2 June 2004 through 4 June 2004