WIT Press


Natural Attenuation Software (NAS): A Computer Program For Estimating Remediation Times Of Contaminated Groundwater

Price

Free (open access)

Paper DOI

10.2495/ENV040191

Volume

69

Pages

10

Published

2004

Size

386 kb

Author(s)

E. Mendez, M. Widdowson, S. Brauner, F. Chapelle & C. Casey

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 t

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