The physical-chemical characteristics of surface waters in the management of quality in clearwater rivers in the Brazilian Amazon
The study of water quality in the Amazon region is important for understanding the functioning of ecological mechanisms. The standard that governs water quality in Brazil, including the Amazon, is Resolution CONAMA 357/05, which uses criteria inspired by standards from other countries. However, this...
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IWA Publishing
2021
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oai:doaj.org-article:117da573ff114c788d7c083f9eda305f2021-11-05T20:20:13ZThe physical-chemical characteristics of surface waters in the management of quality in clearwater rivers in the Brazilian Amazon1366-70171996-975910.2166/wp.2021.258https://doaj.org/article/117da573ff114c788d7c083f9eda305f2021-10-01T00:00:00Zhttp://wp.iwaponline.com/content/23/5/1303https://doaj.org/toc/1366-7017https://doaj.org/toc/1996-9759The study of water quality in the Amazon region is important for understanding the functioning of ecological mechanisms. The standard that governs water quality in Brazil, including the Amazon, is Resolution CONAMA 357/05, which uses criteria inspired by standards from other countries. However, this resolution does not consider characteristics of Amazonian aquatic ecosystems, and this can lead to incorrect interpretation of the data. Furthermore, there are few studies on the physical-chemical characteristics of clearwater rivers in the Amazon and the influence of the forest-water interface. Therefore, water samples were collected from four clearwater tributary watersheds of the Amazonas and Tapajós Rivers during the dry season in the city of Santarém, Pará. Most of the points were collected in pristine areas in order to capture the natural physicochemical characteristics of clearwater rivers, as well as to show the importance of ecoregional aspects in water quality management. All samples were below pH 6.0, which represents non-compliance with the CONAMA resolution. Statistical tests yielded negative correlations between pH and conductivity (r = −0.87, p < 0.05), Therefore, the rivers of lower ionic load are influenced by the type of surrounding vegetation, which are characteristics that have been widely reported for blackwater rivers. HIGHLIGHTS The forest-water interface directly influences physicochemical factors in clearwater rivers.; Rivers with lower ionic load are influenced by dissolved colloidal substances.; Conductivity can be used as an indicator of organic matter in clearwater rivers.; Parameters in natural conditions do not comply with the CONAMA standards.; The standards require adaptation to the characteristics of Amazonian rivers.;Christiane do Nascimento MonteEdinelson Correa SaldanhaIgor CostaThiago Shinaigger Rocha do NascimentoMateus Santos PereiraLouisiane Farias BatistaDanilo Costa PinheiroIWA Publishingarticleamazonclearwater riverforest-water interfacemicro-basinwater qualityRiver, lake, and water-supply engineering (General)TC401-506ENWater Policy, Vol 23, Iss 5, Pp 1303-1313 (2021) |
| institution |
DOAJ |
| collection |
DOAJ |
| language |
EN |
| topic |
amazon clearwater river forest-water interface micro-basin water quality River, lake, and water-supply engineering (General) TC401-506 |
| spellingShingle |
amazon clearwater river forest-water interface micro-basin water quality River, lake, and water-supply engineering (General) TC401-506 Christiane do Nascimento Monte Edinelson Correa Saldanha Igor Costa Thiago Shinaigger Rocha do Nascimento Mateus Santos Pereira Louisiane Farias Batista Danilo Costa Pinheiro The physical-chemical characteristics of surface waters in the management of quality in clearwater rivers in the Brazilian Amazon |
| description |
The study of water quality in the Amazon region is important for understanding the functioning of ecological mechanisms. The standard that governs water quality in Brazil, including the Amazon, is Resolution CONAMA 357/05, which uses criteria inspired by standards from other countries. However, this resolution does not consider characteristics of Amazonian aquatic ecosystems, and this can lead to incorrect interpretation of the data. Furthermore, there are few studies on the physical-chemical characteristics of clearwater rivers in the Amazon and the influence of the forest-water interface. Therefore, water samples were collected from four clearwater tributary watersheds of the Amazonas and Tapajós Rivers during the dry season in the city of Santarém, Pará. Most of the points were collected in pristine areas in order to capture the natural physicochemical characteristics of clearwater rivers, as well as to show the importance of ecoregional aspects in water quality management. All samples were below pH 6.0, which represents non-compliance with the CONAMA resolution. Statistical tests yielded negative correlations between pH and conductivity (r = −0.87, p < 0.05), Therefore, the rivers of lower ionic load are influenced by the type of surrounding vegetation, which are characteristics that have been widely reported for blackwater rivers. HIGHLIGHTS
The forest-water interface directly influences physicochemical factors in clearwater rivers.;
Rivers with lower ionic load are influenced by dissolved colloidal substances.;
Conductivity can be used as an indicator of organic matter in clearwater rivers.;
Parameters in natural conditions do not comply with the CONAMA standards.;
The standards require adaptation to the characteristics of Amazonian rivers.; |
| format |
article |
| author |
Christiane do Nascimento Monte Edinelson Correa Saldanha Igor Costa Thiago Shinaigger Rocha do Nascimento Mateus Santos Pereira Louisiane Farias Batista Danilo Costa Pinheiro |
| author_facet |
Christiane do Nascimento Monte Edinelson Correa Saldanha Igor Costa Thiago Shinaigger Rocha do Nascimento Mateus Santos Pereira Louisiane Farias Batista Danilo Costa Pinheiro |
| author_sort |
Christiane do Nascimento Monte |
| title |
The physical-chemical characteristics of surface waters in the management of quality in clearwater rivers in the Brazilian Amazon |
| title_short |
The physical-chemical characteristics of surface waters in the management of quality in clearwater rivers in the Brazilian Amazon |
| title_full |
The physical-chemical characteristics of surface waters in the management of quality in clearwater rivers in the Brazilian Amazon |
| title_fullStr |
The physical-chemical characteristics of surface waters in the management of quality in clearwater rivers in the Brazilian Amazon |
| title_full_unstemmed |
The physical-chemical characteristics of surface waters in the management of quality in clearwater rivers in the Brazilian Amazon |
| title_sort |
physical-chemical characteristics of surface waters in the management of quality in clearwater rivers in the brazilian amazon |
| publisher |
IWA Publishing |
| publishDate |
2021 |
| url |
https://doaj.org/article/117da573ff114c788d7c083f9eda305f |
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