Lecture 50 - Groundwater Dispersion and Remediation...

Info iconThis preview shows pages 1–2. Sign up to view the full content.

View Full Document Right Arrow Icon
Groundwater Dispersion and Remediation ± Lecture#50 ± hydrodynamic dispersion ± Borden injection experiment ± groundwater remediation ± Reading: M: Ch. 5 (CNP pg. 84-87; 98-107) Groundwater Contamination Suppose one gallon of tetrachloroethylene (PCE) is spilled into groundwater. How much groundwater could it contaminant to the MCL? light non-aqueous phase liquid dense non aqueous phase liquid PCE Contamination ± PCE: C sat = 200 mg/L; MCL: 5 ppb (5 ug/L); ρ PCE = 1.62 g/L ± 1 gal = 3.785 L ± gram amount of PCE: ± amount of water contaminated: ± amount of water contaminated to MCL: g 6132 cm g 1.62 x L cm 10 L 785 . 3 3 3 3 = gal 8100 L 3.785 gal 1 x g 200x10 L 1 g 6132 3 - = gal 10 x 28 . 3 L 3.785 gal 1 x g 5.0x10 L 1 g 6132 8 6 - = Advective Flux of Groundwater ± Advective Flux: movement in flow direction ± In rivers: J m = QC/A = ν C (g/s-m 2 ; mass advection) ± In rivers: J v = Q/A ( m/s; water advection) ± In groundwater: Q/A = -Kdh/dl Darcy’s Law ± K hydraulic conductivity; h piezometric head or just head with units of distance; l is the distance over which head loss is measured ± K m/s (units of velocity; same as Q/A) Advection in Porous Media J v = Q/A = -Kdh/dl -K Δ h/L Darcy’s Law J m = QC/(nA) = ν C (pollutant mass flux in groundwater) ( h 2 h 1 )/L Darcy’s Law ICP#40 ± Application of Darcy’s Law for travel time
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Image of page 2
This is the end of the preview. Sign up to access the rest of the document.

This note was uploaded on 04/17/2008 for the course CEE 260 taught by Professor Kimf.hayes during the Fall '06 term at University of Michigan.

Page1 / 5

Lecture 50 - Groundwater Dispersion and Remediation...

This preview shows document pages 1 - 2. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online