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Digitale Medien

Estimation of Free-Hydrocarbon Recovery from Dual-Pump Systems (1995)

Charbeneau, Randall J. ; Chiang, Chen Y.

Oxford, UK : Blackwell Publishing Ltd

Ground water 33 (1995), S. 0

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ISSN: 1745-6584

Quelle: Blackwell Publishing Journal Backfiles 1879-2005

Thema: Energietechnik , Geologie und Paläontologie

Notizen: Free-product hydrocarbon which floats on the water table may be recovered using single-pump and dual-pump systems. The factors that affect the long-term free-product recovery using dual-pump systems include the free-product thickness as measured in monitoring wells, the ground-water pumping rate, hydrocarbon density and viscosity, and the soil permeability. This paper presents a simple model for prediction of free-product recovery using dual-pump systems. The model predicts the long-term rather than short-term recovery rates, and lends itself to spreadsheet calculations on microcomputers. A particularly simple form arises for cases where the drawdown is small. An application for estimating recovery from a dual-pump system is presented, and limitations of the model are summarized.

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1111/j.1745-6584.1995.tb00318.x

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Digitale Medien

Modeling of in-situ biorestoration of organic compounds in groundwater (1991)

Chiang, Chen Y. ; Dawson, Clint N. ; Wheeler, Mary F.

Springer

Transport in porous media 6 (1991), S. 667-702

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ISSN: 1573-1634

Schlagwort(e): Modified method of characteristics ; time-splitting ; in situ biorestoration ; adsorption ; contaminant transport

Quelle: Springer Online Journal Archives 1860-2000

Thema: Geologie und Paläontologie , Technik allgemein

Notizen: Abstract A convergent numerical method for modeling in situ biorestoration of contaminated groundwater is outlined. This method treats systems of transport-biodegradation equations by operator splitting in time. Transport is approximated by a finite element modified method of characteristics. The biodegradation terms are split from the transport terms and treated as a system of ordinary differential equations. Numerical results for vertical cross-sectional flow are presented. The effects of variable hydraulic conductivity and variable linear adsorption are studied.