Table 9 Classification of the irrigation water quality index (IWQI) with its corresponding spatial coverage in the study area.

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

Index

Class

Area (Km2)

Area (%)

IWQI

Severe restriction

3844.31

51.35

High restriction

3624.51

48.41

Moderate restriction

17.96

0.24

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