Evaluation of nitrogen and phosphorus in surface reservoirs of the semi-arid region of Brazil using mass balance
ABSTRACT Water reservoirs were built in the semi-arid region to mitigate the effects of drought and water scarcity. However, these reservoirs are subject to variables that impact the volume and quality of the stored water, with the contribution of such nutrients as Total Nitrogen (TN) and Total Phos...
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| Format: | Article |
| Language: | English |
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Universidade Federal do Ceará
2023-08-01
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| Series: | Revista Ciência Agronômica |
| Subjects: | |
| Online Access: | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1806-66902023000100457&lng=en&tlng=en |
| _version_ | 1797743270251462656 |
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| author | Carine Fernandes Praxedes Fernando Bezerra Lopes Eunice Maia de Andrade Thiago Teixeira da Silva Helena Becker |
| author_facet | Carine Fernandes Praxedes Fernando Bezerra Lopes Eunice Maia de Andrade Thiago Teixeira da Silva Helena Becker |
| author_sort | Carine Fernandes Praxedes |
| collection | DOAJ |
| description | ABSTRACT Water reservoirs were built in the semi-arid region to mitigate the effects of drought and water scarcity. However, these reservoirs are subject to variables that impact the volume and quality of the stored water, with the contribution of such nutrients as Total Nitrogen (TN) and Total Phosphorus (TP) being one of the main factors in intensifying the eutrophication process. The aim of this study was to quantify the principal inputs and outputs of nutrients (N and P) and calculate the nutrient balance, in order to verify the influence of seasonality on the import and export of these nutrients in surface reservoirs of the semi-arid region of Brazil. Seven campaigns were carried out between 2015 and 2016, with water samples collected at five points in the Pereira de Miranda reservoir and four in the General Sampaio reservoir. The inflow of nutrients was greater when the inflow rate of the water was higher. The balance showed the accumulation of 22.8 tons of TN and 2.8 tons of TP in the Pereira de Miranda reservoir, and 13 tons of TN and 1.5 tons of TP in the General Sampaio. These reservoirs are therefore retaining nutrients, acting as a storage site for nutrients transported by surface runoff in the basin of the Curu River. This increase in storage occurred mainly during the rainy season, when nutrient retention by the reservoirs impaired water quality, resulting in eutrophication, and making it difficult to meet the uses for which the reservoirs were intended. |
| first_indexed | 2024-03-12T14:53:05Z |
| format | Article |
| id | doaj.art-cc8d2817ae6f48dfa1775ad262d729a5 |
| institution | Directory Open Access Journal |
| issn | 1806-6690 |
| language | English |
| last_indexed | 2024-03-12T14:53:05Z |
| publishDate | 2023-08-01 |
| publisher | Universidade Federal do Ceará |
| record_format | Article |
| series | Revista Ciência Agronômica |
| spelling | doaj.art-cc8d2817ae6f48dfa1775ad262d729a52023-08-15T07:47:22ZengUniversidade Federal do CearáRevista Ciência Agronômica1806-66902023-08-015410.5935/1806-6690.20230057Evaluation of nitrogen and phosphorus in surface reservoirs of the semi-arid region of Brazil using mass balanceCarine Fernandes Praxedeshttps://orcid.org/0000-0002-7521-7162Fernando Bezerra Lopeshttps://orcid.org/0000-0001-8285-2925Eunice Maia de Andradehttps://orcid.org/0000-0002-9750-0364Thiago Teixeira da Silvahttps://orcid.org/0000-0002-7651-5612Helena Beckerhttps://orcid.org/0000-0002-7361-1916ABSTRACT Water reservoirs were built in the semi-arid region to mitigate the effects of drought and water scarcity. However, these reservoirs are subject to variables that impact the volume and quality of the stored water, with the contribution of such nutrients as Total Nitrogen (TN) and Total Phosphorus (TP) being one of the main factors in intensifying the eutrophication process. The aim of this study was to quantify the principal inputs and outputs of nutrients (N and P) and calculate the nutrient balance, in order to verify the influence of seasonality on the import and export of these nutrients in surface reservoirs of the semi-arid region of Brazil. Seven campaigns were carried out between 2015 and 2016, with water samples collected at five points in the Pereira de Miranda reservoir and four in the General Sampaio reservoir. The inflow of nutrients was greater when the inflow rate of the water was higher. The balance showed the accumulation of 22.8 tons of TN and 2.8 tons of TP in the Pereira de Miranda reservoir, and 13 tons of TN and 1.5 tons of TP in the General Sampaio. These reservoirs are therefore retaining nutrients, acting as a storage site for nutrients transported by surface runoff in the basin of the Curu River. This increase in storage occurred mainly during the rainy season, when nutrient retention by the reservoirs impaired water quality, resulting in eutrophication, and making it difficult to meet the uses for which the reservoirs were intended.http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1806-66902023000100457&lng=en&tlng=enSemi-arid regionsPeriod of extreme droughtWater reservoirsNutrient input and output |
| spellingShingle | Carine Fernandes Praxedes Fernando Bezerra Lopes Eunice Maia de Andrade Thiago Teixeira da Silva Helena Becker Evaluation of nitrogen and phosphorus in surface reservoirs of the semi-arid region of Brazil using mass balance Revista Ciência Agronômica Semi-arid regions Period of extreme drought Water reservoirs Nutrient input and output |
| title | Evaluation of nitrogen and phosphorus in surface reservoirs of the semi-arid region of Brazil using mass balance |
| title_full | Evaluation of nitrogen and phosphorus in surface reservoirs of the semi-arid region of Brazil using mass balance |
| title_fullStr | Evaluation of nitrogen and phosphorus in surface reservoirs of the semi-arid region of Brazil using mass balance |
| title_full_unstemmed | Evaluation of nitrogen and phosphorus in surface reservoirs of the semi-arid region of Brazil using mass balance |
| title_short | Evaluation of nitrogen and phosphorus in surface reservoirs of the semi-arid region of Brazil using mass balance |
| title_sort | evaluation of nitrogen and phosphorus in surface reservoirs of the semi arid region of brazil using mass balance |
| topic | Semi-arid regions Period of extreme drought Water reservoirs Nutrient input and output |
| url | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1806-66902023000100457&lng=en&tlng=en |
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