Parameter

Unité

Rang

Référence

Water class

N˚ of sample

% of sample

Electrical conductivity

µs/cm

Raghunath, 1987

groundwater

Surface water

groundwater

Surface water

<250

Excellent

7

4

47%

100%

250 - 750

good

5

33%

750 - 2000

permissible

3

20%

2000 - 3000

doubtful

<3000

unsuitable

Sodium adsorption ratio (SAR)

meq/L

0 - 10

Todd, 1980

Excellent

15

4

100%

100%

10 - 18

good

18 - 26

doubtful

>26

unsuitable

Residuel sodium carbonate (RSC)

meq/L

<1.25

Lloyd et Heathcote, 1985

good

15

4

100%

100%

1.25 - 2.5

doubtful

>2.5

unfit

Percentage of sodium

meq/L

<20

Kawo et Karuppannan, 2018

Excellent

2

1

33%

25%

20 - 40

good

9

3

60%

75%

40 - 60

permissible

2

33%

60 - 80

doubtful

2

33%

>80

unfit

0

Kelly Ratio

meq/L

<1

Kelly, 1963

suitable

12

4

80%

100%

>1

unsuitable

3

0

20%

0%

Magnesium hazard

meq/L

<50

Raghumath 1987

suitable

11

1

73%

25%

>50

unsuitable

4

3

27%

75%

Permeability index

meq/L

>75

Oga et al. 2015

Class-I

8

3

53%

75%

25 - 75

Class-II

7

1

47%

25%

<25

Class-III

0

Rapport de corrosité

meg/L

<1

Ryzner, 1944

Raman 1985

suitable

12

3

80%

20%

>1

unsuitable

3

1

20%

25%