Assessment of the water quality and trophic state of the Ribeirão Guaraçau Watershed, Guarulhos (SP): a comparative analysis between rural and urban areas
| Autor: | Márcia da Silva Barros, Regina de Oliveira Moraes Arruda, Reinaldo Romero Vargas, Fernanda Dall'Ara Azevedo, Antonio Roberto Saad |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2018 |
| Předmět: |
Watershed
Sewage 010501 environmental sciences Aquatic Science 01 natural sciences Trophic state index Water pollution lcsh:Environmental sciences 0105 earth and related environmental sciences General Environmental Science urban waters lcsh:GE1-350 water pollution São Paulo Metropolitan Region business.industry Public Health Environmental and Occupational Health Lake ecosystem 04 agricultural and veterinary sciences eutrophication 040103 agronomy & agriculture 0401 agriculture forestry and fisheries Environmental science Water quality Water resource management Eutrophication business Surface water |
| Zdroj: | Revista Ambiente & Água, Vol 13, Iss 2, Pp 1-13 (2018) Revista Ambiente & Água v.13 n.2 2018 Revista Ambiente & Água Instituto de Pesquisas Ambientais em Bacias Hidrográficas (IPABHI) instacron:IPABHI |
| Popis: | The urbanization process through which large urban centers have been passing has affected drastically the availability and especially the quality of water. The Ribeirão Guaraçau Watershed, located in the northern part of the Guarulhos municipality, includes rural and urban areas of different land-use classes. The goal of this study is to assess the water quality and to diagnose the eutrophication stage of the surface waters of the Ribeirão Guaraçau, the main water course of the Ribeirão Guaraçau Watershed. To assess environmental quality, physical-chemical analyses (temperature, pH, turbidity, conductivity, and total phosphorus) and microbiological analyses (E. coli) were carried out during a period of 12 months. The Trophic State Index (TSI) was used to ascertain the environmental degradation conditions of lotic and lentic environments. The surface waters of the Ribeirão Guaraçau in the rural area are already compromised, with worsening of the water quality upstream indicated by high total phosphorus and E. coli caused by fecal contamination due to lack of basic sanitation in the region. Characteristic sites of the rural areas already present signs of degradation with trophic levels varying from oligotrophic to hypereutrophic. The need to provide sewage collectors and sewage treatment systems at the Bonsucesso Sewage Treatment Station, inaugurated in 2011, and the control of the occupation in areas that produce good quality water is paramount. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|