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Daniel, Mariely Helena Barbosa; Montebelo, Alexandra A.; Bernardes, Marcelo; Ometto, Jean Pierre; Camargo, Plínio Barbosa de; Krusche, Alex V.; Ballester, Maria Victória Ramos; Victória, Reynaldo Luiz; Martinelli, Luiz Antônio

doi:10.1023/a:1015287708170

Cited by 165 publications

(32 citation statements)

References 28 publications

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“…The observed values were below this limit, with the Recanto stream showing the highest mean value of 329.7 lS cm -1 , which was 231 and 62% higher than the means for the Pylles and Santa Angélica streams, respectively. Other studies of tributaries of the Piracicaba river crossing urbanized areas have reported mean electrical conductivities similar to or higher than those obtained here, with values of 597.5 lS cm -1 (Daniel et al 2002), 271.8 lS cm -1 (Ometo et al 2000), and 306.0 lS cm -1 (Silva et al 2012).…”

Section: Flow and Water Quality Of Urban Streamssupporting

confidence: 86%

“…It is possible that the low level of dissolved oxygen in the Recanto stream could have been due to point source organic material pollution caused by the inefficient sewage treatment system, resulting in oxygen consumption by aerobic organisms during degradation processes. This phenomenon has been observed previously in streams of the Piracicaba river basin (Daniel et al 2002;Ometo et al 2000).…”

Section: Flow and Water Quality Of Urban Streamssupporting

confidence: 83%

“…The results were also compared with those obtained in previous studies of streams in the Piracicaba river basin (Machado et al 2018;Medeiros et al 2013;Silva et al 2012;Medeiros et al 2009;Filoso et al 2003;Daniel et al 2002;Krusche et al 2002;Martinelli et al 1999;Ometo et al 2000).…”

Section: Physical and Chemical Water Quality Parametersmentioning

confidence: 73%

“…Given the context of the water resources in urban and industrialized areas of Brazil and other developing countries, these streams are highly vulnerable because they receive effluent discharges from small industries and domestic sewage (Machado et al 2018;Galfi et al 2016;Beghelli et al 2015;Poustie and Deletic 2014;Jabeen et al 2014;Sandoval et al 2014;Alves et al 2013;Medeiros et al 2013;Zeilhofer et al 2010;Medeiros et al 2009;Moreira and Fazza 2008;Jamwal et al 2008;Daniel et al 2002;Martinelli et al 1999), which are not monitored or controlled by the environmental agencies. Therefore, studies at this spatial scale can assist in strategic planning and the management of natural resources at municipal and local scales, as well as encourage public policies focusing on water security and the improvement of water quality in urban and rural streams.…”

Section: Introductionmentioning

confidence: 99%

“…The Quilombo watershed extends to 390 km 2 (Daniel et al 2002) and includes the municipalities of Americana, Nova Odessa, Sumaré, Hortolândia and parts of the municipalities of Paulínia and Campinas, where approximately 1.9 million people live. The Quilombo river mouth is located in the city of Americana, with a population of 224,551 inhabitants, of which 99.5% live in the urban area.…”

Section: Introductionmentioning

confidence: 99%

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Water quality, pollutant loads, and multivariate analysis of the effects of sewage discharges into urban streams of Southeast Brazil

Medeiros

Tresmondi

Queiroz

et al. 2017

Energ. Ecol. Environ.

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Water demand, pollution, and climate change threaten water security in industrialized and urbanized regions worldwide, especially in developing countries. Investments in massive infrastructure have often not met the water needs of the population, requiring water resource managers to adopt new approaches, such as decentralized and regionalized management at the micro-basin scale. However, little is known about the impact of anthropogenic activities on the water quality and vulnerability of streams that cross urban areas and feed into the main rivers and reservoirs supplying cities and industrial regions. The main goals of this research were to evaluate the water quality, pollutant loads, and effect of untreated sewage discharges in streams of the Piracicaba river basin, in the municipality of Americana, Southeast Brazil. The water quality parameters evaluated were as follows: pH, dissolved oxygen, electrical conductivity, biochemical oxygen demand, inorganic phosphorus, total phosphorus, total nitrogen, real colour, turbidity, total dissolved solids, metals (Ba, Cr, Cu, Ni, Pb, Cd, and Zn), total coliforms, and Escherichia coli. Descriptive statistics and multivariate analyses were performed. The results revealed chemical and biological degradation of the water resources, and vulnerability of the urban streams due to the release of untreated sewage into these waterways. The findings indicate the need for an immediate implementation of policies to monitor and control discharges of industrial effluents into the sewage collection systems, as well as discharges of sewage into rainwater drainage systems, together with the maintenance of green spaces.

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Section: Flow and Water Quality Of Urban Streamssupporting

confidence: 86%

Section: Flow and Water Quality Of Urban Streamssupporting

confidence: 83%

Section: Physical and Chemical Water Quality Parametersmentioning

confidence: 73%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Water quality, pollutant loads, and multivariate analysis of the effects of sewage discharges into urban streams of Southeast Brazil

Medeiros

Tresmondi

Queiroz

et al. 2017

Energ. Ecol. Environ.

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The relative influence of topography and land cover on inorganic and organic carbon exports from catchments in southern Quebec, Canada

Giorgio

Parkes

et al. 2015

JGR Biogeosciences

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Export of carbon (C) from watersheds represents a key component of local and regional C budgets.We explored the magnitude, variability, and drivers of inorganic, organic, and total C exports from 83 temperate catchments in southern Québec, Canada. The average dissolved inorganic carbon (DIC), dissolved organic carbon (DOC), and total C (TC) exports from these catchments were 4.6, 5.1, and 10.2 g m À2 yr À1 , respectively. Multiple regression models, using a combination of topographical variables (catchment area, shape, and slope), along with land cover variables (%vegetation, %wetland, %lake, and building density), explained 34%, 62%, and 53% of the variability in the DIC, DOC, and TC exports, respectively. Variance partitioning in the models revealed that topography is slightly more important than land cover in explaining the variance in DIC export (19% versus 15%), whereas land cover is much more important than topography in determining DOC export (44% versus 18%). Interestingly, %vegetation had a negative effect on DIC export but a positive effect on DOC export, suggesting that a change in land cover that reduces vegetation (e.g., deforestation) would lead to modest decreases in TC export but large increases in DIC/DOC export ratio. We conclude that topography and land cover together determine DIC, DOC, and TC exports. While topography is static, land cover can be altered, which will determine the quantity, form, and fate of C exported from these catchments. Finally, annual differences in export values that are related to temperature and precipitation suggest that climate change also have an impact on C export. MacPherson et al., 2008], whereas the dissolved CO 2 fraction will be largely lost to the atmosphere, with some being assimilated during photosynthesis Wallin et al., 2013]. Because DOC and DIC LI ET AL. 2007; Key Points:• Land cover is more important than topography in determining DOC export but similar in DIC export • Deforestation decreases total carbon export but greatly increases the DIC/DOC ratio • Catchment shape and %vegetation strongly relate to DOC and DIC exports but in opposite directions Prairie (2015), The relative influence of topography and land cover on inorganic and organic carbon exports from catchments in southern Quebec, Canada,

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Implication of dissolved nitrogen dynamics of urban rivers using multivariate regression and structural equation modeling

Arora

Keshari

2023

CLEAN Soil Air Water

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The river's functional balance varies according to flow regimes and nutrient distribution. Watercourses can receive water from different point and nonpoint sources, which discharge high nitrogen load in rivers generated from domestic and industrial effluents and agricultural runoff. The excessive concentration of nitrogen load affects the riverine ecosystem by attenuating dissolved oxygen balance and disturbing the water quality. A study has been conducted to determine the nitrogen dynamics and their impact on the water quality of the Delhi stretch of Yamuna River, India, which is highly influenced by anthropogenic activities. Multivariate linear regression (MLR) was performed to gain insight into nitrogen dynamics, and structural equation modeling was applied to determine the direct (primary) and indirect (secondary) relation between the water quality parameters and the subsequent impact on water quality. Dissolved inorganic nitrogen (DIN) was measured using ammonia, nitrate, and nitrite, and total Kjeldahl nitrogen was estimated to reflect the dissolved organic nitrogen (DON). The variation in dissolved nitrogen (organic and inorganic) signifies high negative flux on the river's organic content, causing further degradation of river water quality. MLR predicted a high correlation between predicted and observed DIN at the Income Tax Office (ITO) (92.5%) and Nizamuddin (94.37%) and DON at ITO (93.49%) and Nizamuddin (95.28%). The high concentration during the lean period deteriorates the water quality tremendously and suggests that the variation in dissolved nitrogen content should be monitored carefully to maintain the river's water quality dominated by the organic load.

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Cited by 165 publications

References 28 publications

Water quality, pollutant loads, and multivariate analysis of the effects of sewage discharges into urban streams of Southeast Brazil

Water quality, pollutant loads, and multivariate analysis of the effects of sewage discharges into urban streams of Southeast Brazil

The relative influence of topography and land cover on inorganic and organic carbon exports from catchments in southern Quebec, Canada

Implication of dissolved nitrogen dynamics of urban rivers using multivariate regression and structural equation modeling

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