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Groundwater quality of Arattupuzha coastal region of Kerala, India: A study based on pollution index

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Title Groundwater quality of Arattupuzha coastal region of Kerala, India: A study based on pollution index
 
Creator Balamuralikrishna
Achari, V S
Mohanadas, M
 
Subject Coastal aquifers
Hill-Piper Trilinear diagram
Hydrogeochemistry
Pollution
Water quality
 
Description 463-476
The hydrogeochemical profile of groundwater in the southern Kerala coast - Arattupuzha, in Alappuzha, Kerala, India is
reported for drinking and domestic suitability. People at Arattupuzha mostly depend on public water supply for their
domestic and drinking requirements due to limited freshwater availability. In this context, the palatability of coastal
groundwater sources was evaluated and presented based on the weighted arithmetic mean Water Quality Index (WQI) and
Pollution Index of Groundwater (PIG) methods. Groundwater was collected from 6 shallow (Dug wells) and 5 deep (Bore
wells) sources during pre-monsoon (PRM), monsoon (MON) and post-monsoon (POM) seasons in 2019. Water was
analysed for various physical and chemical parameters viz. pH, Eh, Electrical Conductivity (EC), Total Dissolved Solids
(TDS), Total Alkalinity (TA), Total Hardness (TH), Cl-, SO4
2-, HCO3
-, total iron, Dissolved Oxygen (DO), Biochemical
Oxygen Demand (BOD), NO3
-, Na+, K+, Ca2+ and Mg2+. The results were compared with the WHO and BIS standards for
drinking water quality. The WQI showed that most of the groundwater sources are unsuitable (WQI > 100) for direct
drinking purposes. This is attributed to the total iron, TH and TA; hence, it requires pre-treatment prior to use. In the PRM
season, the WQI values were 74.5±95.5 (Shallow Groundwater - SG) and 315.1±151.4 (Deep Groundwater - DG), indicating
poor water quality, while in MON and POM, these were 181.9±125.4 (SG), 413.8±296.7 (DG) and 225.2±97.9 (SG),
406.4±132.6 (DG), respectively showing non-suitability for drinking purpose. Hill-Piper Trilinear diagram revealed Ca-Mg-
HCO3 as the dominant hydrochemical facies. PIG results revealed insignificant pollution (PIG < 1) in water with 0.5±0.3 (SG)
and 0.6±0.3 (DG) values in PRM. Additionally, the Durov, Stiff and radial diagrams were used to represent the prominent
ionic composition of water sources. Overall, the groundwater quality of Arattupuzha coastal area revealed that groundwater
in pre-monsoon was much safer than in the monsoon and post-monsoon seasons.
 
Date 2024-06-13T09:43:04Z
2024-06-13T09:43:04Z
2023-10
 
Type Article
 
Identifier 2582-6727 (Online); 2582-6506 (Print)
http://nopr.niscpr.res.in/handle/123456789/64065
https://doi.org/10.56042/ijms.v52i10.4230
 
Language en
 
Publisher NIScPR-CSIR, India
 
Source IJMS Vol.52(10) [October 2023]