Differential environmental impacts on small and medium size rivers from center of São Paulo State, Brazil, and regional management perspectives
AIM: This study aimed to evaluate, comparatively, the influence of distinct environmental impacts in the watershed on the rivers Capivara, Lavapés, Araquá and Pardo and the transference of effects downstream. METHODS: The limnological/water quality study was carried out in rainy (March/2007) and dry...
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| Format: | Article |
| Language: | English |
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Associação Brasileira de Limnologia
2014-12-01
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| Series: | Acta Limnologica Brasiliensia |
| Subjects: | |
| Online Access: | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S2179-975X2014000400008&lng=en&tlng=en |
| _version_ | 1818546567072710656 |
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| author | Paula Caroline dos Reis Oliveira Marcos Gomes Nogueira Luciana Pinto Sartori |
| author_facet | Paula Caroline dos Reis Oliveira Marcos Gomes Nogueira Luciana Pinto Sartori |
| author_sort | Paula Caroline dos Reis Oliveira |
| collection | DOAJ |
| description | AIM: This study aimed to evaluate, comparatively, the influence of distinct environmental impacts in the watershed on the rivers Capivara, Lavapés, Araquá and Pardo and the transference of effects downstream. METHODS: The limnological/water quality study was carried out in rainy (March/2007) and dry (September/2007) seasons, considering 17 sampling stations. RESULTS: Variables such as channel width and depth, water velocity and temperature increased towards the river's mouth; water transparency, velocity and dissolved oxygen were higher in the upstream regions. Light penetration was total at most sampling stations and pH was predominantly acid. The sampling stations impacted by pollution sources, Lavapés and Araquá Rivers, exhibited higher values of electric conductivity, suspended solids, total nitrogen, nitrate, nitrite, ammonium, total dissolved phosphorus, BOD, and thermotolerant coliforms. Higher values of electric conductivity, turbidity and suspended solids were observed in the rainy season, whereas higher chlorophyll concentrations occurred in the dry season. The Lavapés River exhibits the worst environmental condition, while Capivara River is under better state of conservation. This study shows that it is urgent the implementation of measures for preservation and restoration of these regional aquatic ecosystems. All studied rivers were influenced by seasonal variation, sewage discharges and by watershed use and occupation. The TSI is a good analysis tool. The studied rivers export organic matter and TN, TP and SS loads to Tietê and Paranapanema rivers. CONCLUSIONS: This study show the importance of river management and that the accelerated degradation of the river systems indicates the little progress of the Brazilian legislation in terms of preservation and good management practices and that the interface between science, law, management and conservation need to be improved. |
| first_indexed | 2024-12-12T07:54:56Z |
| format | Article |
| id | doaj.art-2b2da51fdad44fcd9b440369baccfb9a |
| institution | Directory Open Access Journal |
| issn | 2179-975X |
| language | English |
| last_indexed | 2024-12-12T07:54:56Z |
| publishDate | 2014-12-01 |
| publisher | Associação Brasileira de Limnologia |
| record_format | Article |
| series | Acta Limnologica Brasiliensia |
| spelling | doaj.art-2b2da51fdad44fcd9b440369baccfb9a2022-12-22T00:32:21ZengAssociação Brasileira de LimnologiaActa Limnologica Brasiliensia2179-975X2014-12-0126440441910.1590/S2179-975X2014000400008S2179-975X2014000400008Differential environmental impacts on small and medium size rivers from center of São Paulo State, Brazil, and regional management perspectivesPaula Caroline dos Reis Oliveira0Marcos Gomes Nogueira1Luciana Pinto Sartori2Secretaria do Verde e Meio AmbienteUniversidade Estadual PaulistaCentro Universitário São CamiloAIM: This study aimed to evaluate, comparatively, the influence of distinct environmental impacts in the watershed on the rivers Capivara, Lavapés, Araquá and Pardo and the transference of effects downstream. METHODS: The limnological/water quality study was carried out in rainy (March/2007) and dry (September/2007) seasons, considering 17 sampling stations. RESULTS: Variables such as channel width and depth, water velocity and temperature increased towards the river's mouth; water transparency, velocity and dissolved oxygen were higher in the upstream regions. Light penetration was total at most sampling stations and pH was predominantly acid. The sampling stations impacted by pollution sources, Lavapés and Araquá Rivers, exhibited higher values of electric conductivity, suspended solids, total nitrogen, nitrate, nitrite, ammonium, total dissolved phosphorus, BOD, and thermotolerant coliforms. Higher values of electric conductivity, turbidity and suspended solids were observed in the rainy season, whereas higher chlorophyll concentrations occurred in the dry season. The Lavapés River exhibits the worst environmental condition, while Capivara River is under better state of conservation. This study shows that it is urgent the implementation of measures for preservation and restoration of these regional aquatic ecosystems. All studied rivers were influenced by seasonal variation, sewage discharges and by watershed use and occupation. The TSI is a good analysis tool. The studied rivers export organic matter and TN, TP and SS loads to Tietê and Paranapanema rivers. CONCLUSIONS: This study show the importance of river management and that the accelerated degradation of the river systems indicates the little progress of the Brazilian legislation in terms of preservation and good management practices and that the interface between science, law, management and conservation need to be improved.http://www.scielo.br/scielo.php?script=sci_arttext&pid=S2179-975X2014000400008&lng=en&tlng=enpoluiçãoCONAMA 357índice de estado tróficocargas |
| spellingShingle | Paula Caroline dos Reis Oliveira Marcos Gomes Nogueira Luciana Pinto Sartori Differential environmental impacts on small and medium size rivers from center of São Paulo State, Brazil, and regional management perspectives Acta Limnologica Brasiliensia poluição CONAMA 357 índice de estado trófico cargas |
| title | Differential environmental impacts on small and medium size rivers from center of São Paulo State, Brazil, and regional management perspectives |
| title_full | Differential environmental impacts on small and medium size rivers from center of São Paulo State, Brazil, and regional management perspectives |
| title_fullStr | Differential environmental impacts on small and medium size rivers from center of São Paulo State, Brazil, and regional management perspectives |
| title_full_unstemmed | Differential environmental impacts on small and medium size rivers from center of São Paulo State, Brazil, and regional management perspectives |
| title_short | Differential environmental impacts on small and medium size rivers from center of São Paulo State, Brazil, and regional management perspectives |
| title_sort | differential environmental impacts on small and medium size rivers from center of sao paulo state brazil and regional management perspectives |
| topic | poluição CONAMA 357 índice de estado trófico cargas |
| url | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S2179-975X2014000400008&lng=en&tlng=en |
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