Natural Attenuation Software (NAS): A computer program for estimating remediation times of contaminated groundwater
By: E. Mendez, M. Widdowson, S. Brauner, F. Chapelle, and C. Casey
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.
Suggested Citation
Mendez, E., Widdowson, M., Brauner, S., Chapelle, F., Casey, C., 2004, Natural Attenuation Software (NAS): A computer program for estimating remediation times of contaminated groundwater, in Environmental Studies, v. 11, Ancona, 2 June 2004 through 4 June 2004, p. 185-194.
| 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 |
| Larger Work Title | Environmental Studies |
| First page | 185 |
| Last page | 194 |
| 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 |