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Development of an Integrated Irrigation Water Quality Index (IIWQIndex) model by Md. Shajedul Islam; M. G. Mostafa is a Environmental Science article available to read on EtoBox.

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## Abstract There are many irrigation water quality indices used to assess water suitability, despite having limitations. It is therefore imperative to develop a water quality index to evaluate irrigation water more accurately. This study highlights an Integrated Irrigation Water Quality Index (IIWQIndex) using the sub-index and aggregated equations. This proposed index model was improved and updated across four characteristics: the verified desirable and permissible value of parameters, maximum hazard class, and modified rating system of diversified parameters. The proposed IIWQIndex model classified irrigation water into five categories: rejection, poor, moderate, good, and excellent. This model assessed two types of water to justify the model by categorizing the irrigation waters. The calculated results showed that the index values were 75.77 and 36.51, and the water category was ‘good’ and ‘rejected’ for the calcite (Ca–HCO3) and sodic (Na–Cl) water, respectively. This index model also satisfactorily evaluated different types of water datasets of eight geographic locations in the world. The study illustrated that the IIWQIndex evaluated values and water categories were rational

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Author

Md. Shajedul Islam; M. G. Mostafa

Publisher

IWA Publishing

Published

2021

Language

EN

Field

Environmental Science (Physical Sciences)