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!+ & ! @ # ,%//()&$ !% +$#$(6- ##@% ! # $$$ ;( # + $ & ! &# $##! <$( $ $$$* #B0$&() <# 2 & $# #(3< #$& 1 % $$ #$$ $# 9 4 $% $$! #+$$ % 3(4() $%$# $#1&#%% $#(

-400

-300

-200

-100

0

100

200

Self-potential (mV)

a

Entressen Landfill

Settling basins

SP base

Wells for chemicalanalyses7

SP data points

Ground waterflow direction

N

Wells for piezometricanalyses

500 m

P12P12

P13P13

P2P2

73

1200m

71000m

10 11 2

23

6

17

5

2692 15

21

P8P8

SP profiles (seeFigure 9)

% 1$.% #+&0 ! &1002 30 +! &0+ + 4 4

! "#"$"

< ! 4 !$ =) % ## # "%# #& .653(() $ !; 2 # 2 % % ! !((!#!&=)% !# % & )&() .61 +).+% % H # # A NB () H%& #!! & #!(( ; !++() 45+ ! $#% $ #$#4!+!# #(

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NO3/O2 red.Fe(III)/Mn(IV) red.CH4 + SO4 red.

landfill

Organicmatter

[Fe2+]=0 mg/l

[Fe2+]>10 mg/l

C(H2O)

FeIIIOOH

BiofilmOrganicmatter

Diffusion

Fe2+

EH0

Fe2+

Aquitard

Aquifer

Vadose zone

EHEHEH1 2 3

Groundwater flow

% 6, "4++555 +" + $,,,% " $,,,% " #+ " + ++ #

+ # 6

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3 // $$ 2 #+$ ! % (. #+ $$* #3 @ 2 & *$ &=! 4J

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Redox potential (mV)

-1000

-800

-600

-400

-200

0

200

73

1200m

71000m

10 11 2

23

65

2692

21

Entressen Landfill

Settling basins

SP base

Wells for chemicalanalyses7

SP data points

Ground waterflow direction

500 m

Wells for piezometricanalyses

Redox Front

Redox Front

15

17

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SP measured on the field

Estimation of C'

Piezometric head data

Remove the electrokineticcomponent from the

SP field data

Correlation between SP and EH

EH measured on boreholes

Estimation of a redox map

% /+ "

-500

-400

-300

-200

-100

0

100

0 100 200 300 400 500 600 700-200

-150

-100

-50

0

0 200 400 600 800 1000

P13 P12

SP

(mV

)

Distance (m) Distance (m)

-600

-500

-400

-300

-200

-100

0

100

0 200 400 600 800 1000 1200 1400 1600-400

-300

-200

-100

0

100

0 500 1000 1500 2000 2500 3000 3500 4000Distance (m) Distance (m)

SP

(mV

)

P2 P8

50 m

50 m

100 m

100 m

360 mV

150 mV

350 mV 180 mV

West WestEast East

NorthWest East South

% 3, 2&#21#23&23)$)% + 70300

+370)70.

Entressen landfill

N

92

17

5

26

15

Settlingbasin

11102

23

A

B

0 100 200mD

C

% 4. $'% +,$%( + )+

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s

f

F

4

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# !

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. /% $ *$ #() # (BN(B% ! ! L(1 # ! ! & !$

! "#"$"

% 44) $'% ; + ; 30 )

5 85 165 245 325 405 485 565 645 725 805 885 965 1045

Electrical resistivity (in Ω.m)

1.0

2.0

3.0

4.0

5.0

6.0

7.0

0.0

Aq

uif

erV

ado

se z

on

eDepth (m)

#10

#92 #17

#15

#2

#5

#11

5.56

3.82

2.25

0.75

AB

8.0

9.0

10.0

11.0

12.0

13.0

14.0

15.0

14.40

11.86

9.56

Mar

l (P

lioce

ne)

7.46

7.0

8.0

Depth (m)

((=!//& ( +& " # !

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M'

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" ! ! !# % &

0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8Fluid conductivity in boreholes, σf (S/m)

0.08

0.07

0.06

0.05

0.04

0.03

0.02

0.01

0

Bul

k co

nduc

tivity

from

ER

T, σ

(S/m

)

F = 10.4 = 10.4 + 0.8 0.8 R² = 0.92 = 0.92

-

#11

#2

#92

#26#5

#10#17

σ=(1/F) σf z = -5.56 m = -5.56 m

0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8Fluid conductivity in boreholes, σf (S/m)

0.035

0.03

0.025

0.02

0.015

0.01

0.005

0

Bul

k co

nduc

tivity

from

ER

T, σ

(S/m

)

-F F = 23.1 = 23.1 + 1.7 1.7R² = 0.91 = 0.91

#11

#2

#92

#26

#5

#10#17

σ=(1/F) σf z = -3.82 m = -3.82 m

% 458 +$ % + $

% )'4<)1&4<77=

0.0 0.15 0.3 0.45 0.5 0.75 0.9 1.05

Calculated electrical conductivity of the groundwater (S/m)

Z = -5.56 mZ = -5.56 m

#92

#5

#10 #11 #2

#15

#17

#26

A

B

N

100 200 300 400 500 600 700 800 900 m

σf = = F σF = 10.4 = 10.4

Z = -3.82 mZ = -3.82 m

100

200

300

400

500

600

700

800

100 200 300 400 500 600 700 800 900 m

#92

#10 #11 #2

#15

#17

#5

#26

A

B

N σf = = F σF = 23.1 = 23.1

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