Table 6 Classification of irrigation water quality parameters with their corresponding spatial coverage in study area.

From: Hydrochemical and GIS-based evaluation of groundwater suitability for irrigation using IWQI in the desert hinterland of western Nile Delta Egypt

Parameters

Class

Area (Km2)

Area (%)

pH

Excellent

7486.83

100.00

TDS

Excellent

17.63

0.25

Good

5938.44

83.21

Doubtful

1170.46

16.40

Unsuitable

10.17

0.14

Cl−

Excellent

7.09

0.10

Good

2316.61

30.94

Unsuitable

5163.09

68.96

Na+

Good

2810.79

37.54

Unsuitable

4675.99

62.46

SO₄²⁻

Excellent

4363.31

58.28

Good

3123.47

41.72

HCO₃⁻

Excellent

6330.13

84.55

Good

1156.65

15.45

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