Atmospheric deposition and land-surface runoff driven nutrient flushing in Ganga River (India)
Disproportionate addition of nutrients can alter the nutrient stoichiometric balance of surface water bodies. In the present study, we investigated the atmospheric deposition (AD) and runoff-induced nutrient enrichment and N:P stoichiometric shifts in the Ganga River along a 35 km stretch of Varanas...
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| Format: | Article |
| Language: | English |
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Taylor & Francis Group
2020-01-01
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| Series: | Water Science |
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| Online Access: | https://www.tandfonline.com/doi/10.1080/11104929.2020.1839344 |
| _version_ | 1811185701919653888 |
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| author | Jitendra Pandey Usha Pandey Anand V. Singh Deepa Jaiswal Ekabal Siddiqui Kavita Verma |
| author_facet | Jitendra Pandey Usha Pandey Anand V. Singh Deepa Jaiswal Ekabal Siddiqui Kavita Verma |
| author_sort | Jitendra Pandey |
| collection | DOAJ |
| description | Disproportionate addition of nutrients can alter the nutrient stoichiometric balance of surface water bodies. In the present study, we investigated the atmospheric deposition (AD) and runoff-induced nutrient enrichment and N:P stoichiometric shifts in the Ganga River along a 35 km stretch of Varanasi city. The region receives 8–42 kg ha−1 of reactive-N (NO3− + NH4+) and 0.40–3.10 kg ha−1 of PO43- through AD annually. The most polluted Rajghat Site receives ~770.50 tons of reactive-N (Nr) and ~64.50 tons of PO43- annually as AD input in the sub-watershed; and ~25.10 tons of Nr and 2.09 tons of PO43- directly on the water surface. Concentrations of nutrients in surface runoff increased with AD input irrespective of land use. Among land use categories, the runoff nitrate was highest from agricultural catchment while NH4+ and PO43- were highest from urban areas. The study showed that the AD-runoff coupled with additional supplies could substantially alter the overall load and stoichiometric ratios of critical nutrients with a consequent effect on ecological functioning of the river in long-run. |
| first_indexed | 2024-04-11T13:33:40Z |
| format | Article |
| id | doaj.art-d5728c50738f42529861ccb54b60f0e6 |
| institution | Directory Open Access Journal |
| issn | 2357-0008 |
| language | English |
| last_indexed | 2024-04-11T13:33:40Z |
| publishDate | 2020-01-01 |
| publisher | Taylor & Francis Group |
| record_format | Article |
| series | Water Science |
| spelling | doaj.art-d5728c50738f42529861ccb54b60f0e62022-12-22T04:21:42ZengTaylor & Francis GroupWater Science2357-00082020-01-0134119020110.1080/11104929.2020.1839344Atmospheric deposition and land-surface runoff driven nutrient flushing in Ganga River (India)Jitendra Pandey0Usha Pandey1Anand V. Singh2Deepa Jaiswal3Ekabal Siddiqui4Kavita Verma5Ganga River Ecology Research Laboratory, Environmental Science Division, Centre of Advanced Study in Botany, Institute of Science, Banaras Hindu University, Varanasi, IndiaDepartment of Botany, Faculty of Science and Technology, Mahatma Gandhi Kashividyapith University, Varanasi, IndiaGanga River Ecology Research Laboratory, Environmental Science Division, Centre of Advanced Study in Botany, Institute of Science, Banaras Hindu University, Varanasi, IndiaGanga River Ecology Research Laboratory, Environmental Science Division, Centre of Advanced Study in Botany, Institute of Science, Banaras Hindu University, Varanasi, IndiaGanga River Ecology Research Laboratory, Environmental Science Division, Centre of Advanced Study in Botany, Institute of Science, Banaras Hindu University, Varanasi, IndiaGanga River Ecology Research Laboratory, Environmental Science Division, Centre of Advanced Study in Botany, Institute of Science, Banaras Hindu University, Varanasi, IndiaDisproportionate addition of nutrients can alter the nutrient stoichiometric balance of surface water bodies. In the present study, we investigated the atmospheric deposition (AD) and runoff-induced nutrient enrichment and N:P stoichiometric shifts in the Ganga River along a 35 km stretch of Varanasi city. The region receives 8–42 kg ha−1 of reactive-N (NO3− + NH4+) and 0.40–3.10 kg ha−1 of PO43- through AD annually. The most polluted Rajghat Site receives ~770.50 tons of reactive-N (Nr) and ~64.50 tons of PO43- annually as AD input in the sub-watershed; and ~25.10 tons of Nr and 2.09 tons of PO43- directly on the water surface. Concentrations of nutrients in surface runoff increased with AD input irrespective of land use. Among land use categories, the runoff nitrate was highest from agricultural catchment while NH4+ and PO43- were highest from urban areas. The study showed that the AD-runoff coupled with additional supplies could substantially alter the overall load and stoichiometric ratios of critical nutrients with a consequent effect on ecological functioning of the river in long-run.https://www.tandfonline.com/doi/10.1080/11104929.2020.1839344Atmospheric depositionGanga RiverN:P stoichiometrySurface runoff |
| spellingShingle | Jitendra Pandey Usha Pandey Anand V. Singh Deepa Jaiswal Ekabal Siddiqui Kavita Verma Atmospheric deposition and land-surface runoff driven nutrient flushing in Ganga River (India) Water Science Atmospheric deposition Ganga River N:P stoichiometry Surface runoff |
| title | Atmospheric deposition and land-surface runoff driven nutrient flushing in Ganga River (India) |
| title_full | Atmospheric deposition and land-surface runoff driven nutrient flushing in Ganga River (India) |
| title_fullStr | Atmospheric deposition and land-surface runoff driven nutrient flushing in Ganga River (India) |
| title_full_unstemmed | Atmospheric deposition and land-surface runoff driven nutrient flushing in Ganga River (India) |
| title_short | Atmospheric deposition and land-surface runoff driven nutrient flushing in Ganga River (India) |
| title_sort | atmospheric deposition and land surface runoff driven nutrient flushing in ganga river india |
| topic | Atmospheric deposition Ganga River N:P stoichiometry Surface runoff |
| url | https://www.tandfonline.com/doi/10.1080/11104929.2020.1839344 |
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