Water quality of the Uppanar estuary, Southern India: Implications on the level of dissolved nutrients and trace elements

Gopal, V.; Shanmugasundaram, A.; Nithya, B.; Magesh, N.S.; Jayaprakash, M.

doi:10.1016/j.marpolbul.2018.03.046

Cited by 48 publications

(17 citation statements)

References 23 publications

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“…Among these, several important rivers are being originated from the Western Ghats, which are important water resources in southern India (Ramachandra et al 2018). However, the pollution levels of these south Indian rivers are increasing every year and which is most affected in their esturine regions (Gopal et al 2018). Estuaries are one among the most urbanised ecosystem and greatly facing environmental pressure by anthropogenic activities includes habitat loss, algal blooms, anoxia, and contamination by sewage, heavy metals and other organic and inorganic pollutants (Bashir et al 2020).…”

Section: Introductionmentioning

confidence: 99%

Bacterioplankton diversity and pollution levels in the estuarine regions of Chaliyar and Anjarakkandi rivers, Kerala, India

Nikitha¹,

Narayanankutty²,

Jacob³

2021

Preprint

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Rivers and the estuarine regions play crucial roles in the environment by controlling the nutrient cycling, waste disposal, and also in supporting biodiversity. However, the estuarine regions of rivers are highly susceptible to disruptive changes by anthropogenic pollutants and eutrophication. Bacterioplankton diversity is the best indicators of the pollution level and eutrophication status of the rivers. The present study evaluated the eutrophication status and bacterioplankton diversity of the estuarine regions of Chaliyar and the Anjarakkandi originated from the Western Ghats. The present study observed the presence of increased incidence of bacterioplankton comprising of proteobacteria, actinobacteria and cyanobacteria in the estuarine regions of Anjarakkandi river compared to that of Chaliyar river. Further, the percentage incidence of faecal bacteria including Bacillus subtilis and E. coli, were also found to be in high in the Anjarakkandi river; in corroborating with this, the diversity of nitrogen metabolizing bacteria was also higher in the estuarine samples of Anjarakkandi river. Corroborating with this, the levels of water nutrients including nirates, nitrites and phosphates were high in the Anjarakkandi compared to the Chaliyar river. Together, it is possible that there might be increased faecal contamination and subsequent increased eutrophication in the estuarine regions of Anjarakkandi river. Altogether, the study concludes that the Anjarakkandi river may be more polluted and which is partly contributed by faecal contaminants and also responsible for the change in the bacterioplankton community of the estuaries.

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Section: Introductionmentioning

confidence: 99%

Bacterioplankton diversity and pollution levels in the estuarine regions of Chaliyar and Anjarakkandi rivers, Kerala, India

Nikitha¹,

Narayanankutty²,

Jacob³

2021

Preprint

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“…The coastal areas of India are dynamic ecosystems where there is a confluence of fresh and marine water. Being at the interface of land and marine systems these ecosystems receive river discharges, dredging, waste dumping, industrial effluents, domestic sewage disposal, and various other pollutants (Gopal et al, 2018;Vijay Prakash et al, 2021). This continuous input of anthropogenic pollutants exerts a significant impact on the coastal environments (Häder et al, 2020).…”

Section: Introductionmentioning

confidence: 99%

Effect of COVID-19 Lockdown on Metal Concentration in the Water Column of Asia’s Largest Coastal Lagoon

Sh¹,

Mishra²,

Sk³

et al. 2021

Preprint

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A complete halt on all anthropogenic activities and human movement due to COVID-19 lockdown has provided a great opportunity to assess the impact of human activities on coastal marine ecosystems. The current study assessed the concentration of the metals in water samples of the largest brackish water lagoon of Asia; the Chilika lagoon in the state of Odisha, India between pre-COVID-19 and post-COVID-19 lockdown scenarios. Monthly water samples (n=30 stations) from 0.3 m depth were collected from three sectors of the lagoon seasonally; pre-monsoon, monsoon, and post-monsoon. In addition to various physical parameters [pH, salinity, alkalinity, (DO) dissolved oxygen, (TDS) total dissolved solids, and (EC) electrical conductivity] the collected water samples were analysed for 18 trace metals (Al, As, Ba, Be, Cd, Co, Cr, Cu, Fe, Mn, Mo, Ni, Pb, Sr, Th, Tl, U, V). Most of the physical parameters showed a significant variation between pre-and post-COVID-19 scenarios, except for pH and DO. The concentration of five metals (Be, Cd, Co, Ni, and Pb) remained below detection limits in all water samples. The impact of COVID-19 lockdown on the concentration of the metal in the water samples was noticed along with the three sectors of the lagoon. However, eight metals (Al, As, Cr, Fe, Mn, Th, U, and V) were significantly different between the COVID-19 scenarios and the remaining five metals were not statistically significant. The mean concentration of Al, As, Fe, Th, and V were higher in the pre-COVID-19 scenarios, whereas only Cr and Mn were higher in the post-COVID-19 scenarios. The mean concentration of U was similar among both COVID-19 scenarios, even though there were seasonal and sectoral differences. The seasonal influence of riverine influx was more evident on metal concentration during the monsoon season, whereas the difference between sectors was more prominent during the post-monsoon season. An increased number of correlations between physical parameters and metal concentration were observed in the post-monsoon season and post-COVID-19 scenario. This study provides evidence that the imposition of COVID-19 lockdown reduced metal influx in the water column and improved the water quality of the Chilika lagoon. Our results can be used as baseline for metal concentration in surface waters of the lagoon.

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“…Monitoring and assessment of the environment can help in realizing the cause of the deteriorating condition in the estuarine ecosystems and in clarifying the changes in spatiotemporal patterns, thus recommending sustainable management plans for ecosystem restoration [5].…”

Section: Introductionmentioning

confidence: 99%

Investigation of water quality from Damanga estuary through the water quality indexing Gujarat

Patel

Sahoo

2021

Sust. Agric. Food Env. Res.

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The seasonal investigation about the water quality from Damanganga river estuary on two habitats downstream and upstream was carried out from January to December 2019 containing three major seasons: winter, summer and monsoon. For this monitoring activity total 29 parameters (24 physico-chemical parameters and 5 heavy metals) were analyzed. Multivariate analyses suggested inter dependency among these studied parameters. Water Quality Index is computed based on the major fluctuated and affected parameters. The calculated values of WQI for all three seasons ranged from 122.84 to 173.82 which suggested poor water quality of the water body. WQI values of the investigation area proposed that the estuarine water quality is deteriorated due to high value of presented heavy metals (Aluminum, Iron, Manganese, Boron and Zinc), Chloride, Ammonium and Sulfate in water sample. In this case, the downstream station is having accessional pollutant contaminations while the upstream station is having diminutive pollutant contaminants. Temporally, the dominant frailty found during the winter followed by summer and monsoon. This study field exhibited poor quality of water; the reason behind this might be the impressive surrounding industrial zone as well as other anthropogenic activities. There is quite normal probability distribution expressed by the represented water quality data at the both habitats. The Bray-Curtis cluster analysis shows different percentage similarity level between the water quality parameters.

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Water quality of the Uppanar estuary, Southern India: Implications on the level of dissolved nutrients and trace elements

Cited by 48 publications

References 23 publications

Bacterioplankton diversity and pollution levels in the estuarine regions of Chaliyar and Anjarakkandi rivers, Kerala, India

Bacterioplankton diversity and pollution levels in the estuarine regions of Chaliyar and Anjarakkandi rivers, Kerala, India

Effect of COVID-19 Lockdown on Metal Concentration in the Water Column of Asia’s Largest Coastal Lagoon

Investigation of water quality from Damanga estuary through the water quality indexing Gujarat

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