Nutrient chemistry and eutrophication risk assessment of the Ghaghara river, India

This study was carried out to evaluate the eutrophication risk associated with the nutrient flux from the Ghaghara river by using nutrient molar ratios and indicators for coastal eutrophication potential values. The concentration of ammonium (3–8 times), nitrate (3–10 times), and phosphate (3–4.5 ti...

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Autores principales:	Nirdesh Kumar Ravi, Atul Srivastava, Kirpa Ram, Pawan Kumar Jha
Formato:	article
Lenguaje:	EN
Publicado:	IWA Publishing 2021
Materias:	din:dip dsi:din eutrophication ghaghara river icep spatial and seasonal variation Water supply for domestic and industrial purposes TD201-500 River, lake, and water-supply engineering (General) TC401-506
Acceso en línea:	https://doaj.org/article/781fd766796343e5a04a2d4df902603f
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spelling	oai:doaj.org-article:781fd766796343e5a04a2d4df902603f2021-11-23T18:55:57ZNutrient chemistry and eutrophication risk assessment of the Ghaghara river, India1606-97491607-079810.2166/ws.2021.110https://doaj.org/article/781fd766796343e5a04a2d4df902603f2021-11-01T00:00:00Zhttp://ws.iwaponline.com/content/21/7/3486https://doaj.org/toc/1606-9749https://doaj.org/toc/1607-0798This study was carried out to evaluate the eutrophication risk associated with the nutrient flux from the Ghaghara river by using nutrient molar ratios and indicators for coastal eutrophication potential values. The concentration of ammonium (3–8 times), nitrate (3–10 times), and phosphate (3–4.5 times) in the Ghaghara river were higher than the reported value for the unpolluted rivers, indicating the contribution from the anthropogenic sources. The dissolved nutrients concentration showed significant seasonal variations in the Ghaghara river system. The specific yield of nitrate-N, phosphate-P, and dissolved silica-Si from the Ghaghara river were 0.49, 0.03 and 0.96 tons km−2 yr−1 respectively. The average molar ratio for dissolved inorganic nitrogen (DIN)/Dissolved inorganic Phosphate (DIP) was above 16:1, which indicated phosphate limitation in biological productivity. In contrast, an average molar ratio of Dissolved inorganic Silica (DSi)/DIN of 4.6 ± 4.4 favored the diatom growth in the Ghaghara river. The negative value of P-ICEP (-2.93 kg C. km−2day−1) indicated phosphate limitation in the Ghaghara river. The positive value of N-ICEP (1.71 kg C·km−2day−1) indicates an excess of nitrogen over silica transport from the Ghaghara river to the Ganga river, which can create an eutrophication problem in the Ganga river. HIGHLIGHTS Nutrient concentration is contributed by allochthonous and autochthonous sources.; Nitrate is a major species constituting the DIN load in the Ghaghara river.; Significant seasonal variation was observed in nutrients concentration.; Phosphate limits the primary productivity in the Ghaghara river.; A positive value of N-ICEP indicates the potential of eutrophication condition in the receiving Ganga water.;Nirdesh Kumar RaviAtul SrivastavaKirpa RamPawan Kumar JhaIWA Publishingarticledin:dipdsi:dineutrophicationghaghara rivericepspatial and seasonal variationWater supply for domestic and industrial purposesTD201-500River, lake, and water-supply engineering (General)TC401-506ENWater Supply, Vol 21, Iss 7, Pp 3486-3502 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	din:dip dsi:din eutrophication ghaghara river icep spatial and seasonal variation Water supply for domestic and industrial purposes TD201-500 River, lake, and water-supply engineering (General) TC401-506
spellingShingle	din:dip dsi:din eutrophication ghaghara river icep spatial and seasonal variation Water supply for domestic and industrial purposes TD201-500 River, lake, and water-supply engineering (General) TC401-506 Nirdesh Kumar Ravi Atul Srivastava Kirpa Ram Pawan Kumar Jha Nutrient chemistry and eutrophication risk assessment of the Ghaghara river, India
description	This study was carried out to evaluate the eutrophication risk associated with the nutrient flux from the Ghaghara river by using nutrient molar ratios and indicators for coastal eutrophication potential values. The concentration of ammonium (3–8 times), nitrate (3–10 times), and phosphate (3–4.5 times) in the Ghaghara river were higher than the reported value for the unpolluted rivers, indicating the contribution from the anthropogenic sources. The dissolved nutrients concentration showed significant seasonal variations in the Ghaghara river system. The specific yield of nitrate-N, phosphate-P, and dissolved silica-Si from the Ghaghara river were 0.49, 0.03 and 0.96 tons km−2 yr−1 respectively. The average molar ratio for dissolved inorganic nitrogen (DIN)/Dissolved inorganic Phosphate (DIP) was above 16:1, which indicated phosphate limitation in biological productivity. In contrast, an average molar ratio of Dissolved inorganic Silica (DSi)/DIN of 4.6 ± 4.4 favored the diatom growth in the Ghaghara river. The negative value of P-ICEP (-2.93 kg C. km−2day−1) indicated phosphate limitation in the Ghaghara river. The positive value of N-ICEP (1.71 kg C·km−2day−1) indicates an excess of nitrogen over silica transport from the Ghaghara river to the Ganga river, which can create an eutrophication problem in the Ganga river. HIGHLIGHTS Nutrient concentration is contributed by allochthonous and autochthonous sources.; Nitrate is a major species constituting the DIN load in the Ghaghara river.; Significant seasonal variation was observed in nutrients concentration.; Phosphate limits the primary productivity in the Ghaghara river.; A positive value of N-ICEP indicates the potential of eutrophication condition in the receiving Ganga water.;
format	article
author	Nirdesh Kumar Ravi Atul Srivastava Kirpa Ram Pawan Kumar Jha
author_facet	Nirdesh Kumar Ravi Atul Srivastava Kirpa Ram Pawan Kumar Jha
author_sort	Nirdesh Kumar Ravi
title	Nutrient chemistry and eutrophication risk assessment of the Ghaghara river, India
title_short	Nutrient chemistry and eutrophication risk assessment of the Ghaghara river, India
title_full	Nutrient chemistry and eutrophication risk assessment of the Ghaghara river, India
title_fullStr	Nutrient chemistry and eutrophication risk assessment of the Ghaghara river, India
title_full_unstemmed	Nutrient chemistry and eutrophication risk assessment of the Ghaghara river, India
title_sort	nutrient chemistry and eutrophication risk assessment of the ghaghara river, india
publisher	IWA Publishing
publishDate	2021
url	https://doaj.org/article/781fd766796343e5a04a2d4df902603f
work_keys_str_mv	AT nirdeshkumarravi nutrientchemistryandeutrophicationriskassessmentoftheghagharariverindia AT atulsrivastava nutrientchemistryandeutrophicationriskassessmentoftheghagharariverindia AT kirparam nutrientchemistryandeutrophicationriskassessmentoftheghagharariverindia AT pawankumarjha nutrientchemistryandeutrophicationriskassessmentoftheghagharariverindia
_version_	1718416160232308736

Nutrient chemistry and eutrophication risk assessment of the Ghaghara river, India

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