Relationship between geological domain and physicochemical parameters in lotic system

Ramos, Sandra Martins; Vaz, Ana Paula de Melo e Silva; Giusti, Donizeti Antônio; Filho, Ernani Francisco da Rosa

doi:10.1590/2318-0331.011716075

Cited by 3 publications

(3 citation statements)

References 21 publications

(18 reference statements)

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“…Regardless of geographic location, studies were often able to discern the influence of agricultural land use (nonpoint source nutrients) versus sewage versus physicochemical variability on surface waters (Ayeni & Soneye, 2013; Mishra, 2010; Simeonov et al, 2003; Singh et al, 2020). In less populated areas with less agricultural land use, the influence of geologic factors (weathering and soil leaching) more strongly affected surface water quality (Ramos et al, 2016; Simeonov et al, 2003).…”

Section: Case Studiesmentioning

confidence: 99%

Using large, open datasets to understand spatial and temporal patterns in lotic ecosystems: NEON case studies

et al. 2022

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Leveraging big, open data is the next frontier in ecology. The National Ecological Observatory Network (NEON) is a network of monitoring sites collecting ecological data from across the United States. Using a case study approach, we provide examples of how NEON data can be applied to address a few big questions in aquatic ecology. First, we examined spatial patterns in stream water chemistry, to determine whether sites tend to cluster into regions based on geographic proximity. We found that this was not the case, likely because the hydrologic, geologic, and anthropogenic factors that drive heterogeneity in stream water chemistry vary across smaller spatial scales. Second, we examined temporal variability in stream water chemistry. We determined that the majority of catchments are relatively chemostatic (i.e., discharge varies by orders of magnitude more than concentrations) and that differences between catchments are likely to shift across decades due to changes in network conductivity. Third, we tested predictions of the River Continuum Concept (RCC) along a gradient from a second-order stream to a seventh-order river. We found that longitudinal patterns in metabolism, carbon chemistry, and macroinvertebrate community composition generally follow the patterns predicted by the RCC. NEON is only in its third year of full operations, with a planned 30-year life. The studies presented here show the utility of NEON data, while only using a subset of the many data products that NEON produces. The massive amounts and types of data NEON generates, in conjunction with other national-scale datasets, will allow the research community to better understand how aquatic ecosystems function and respond to drivers of long-term change.

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Section: Case Studiesmentioning

confidence: 99%

Using large, open datasets to understand spatial and temporal patterns in lotic ecosystems: NEON case studies

et al. 2022

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“…Therefore, there is a close correspondence between the rock substrate in the catchment and metal contents in water (cf. also Camarero et al, 2009;Ramos et al, 2016). Anions usually comprise more diverse sources than cations.…”

Section: Limnological Characteristics and Their Controlling Factorsmentioning

confidence: 99%

Limnological characteristics and planktonic diversity of five tropical upland lakes from Brazilian Amazon

Sahoo

Guimarães

Souza-Filho

et al. 2017

Ann. Limnol. - Int. J. Lim.

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A limnological investigation involving physical, chemical and biological aspects was undertaken in five tropical upland lakes (Violão À Vl, Amendoim À Am, and Três Irmãs À TI1, TI2 and TI3) from Serra dos Carajás, Brazil. Results show that these lakes are shallow, weakly stratified, and of polymictic type. These characteristics may have caused vertical mixing of limnological parameters. Seasonal changes were minor for most parameters, except for chlorophyll-a (Chl-a) and cyanobacteria, which also showed considerable variation between lakes. In general, waters of these lakes were mostly acidic in nature (avg. pH 4.9-5.9), with high total Fe (up to 1.52 mg/L) and low electrolytic conductivity (avg. 8.13-14 mS/cm) and total phosphorus (TP) (avg. 10-35.5 mg/L). Although the water bodies have good quality and classified as class I and II types according to CONAMA Resolution No. 357/05, trophic state index (TSI) varies from ultra-oligotrophic to eutrophic state, with higher trophic state observed for Vl, TI1 and TI2. Limnological characteristics of these lakes is highly influenced by lithological and morphological parameters. Principal component analysis (PCA) reveals that Chl-a and cyanobacteria are not solely influenced by TP and lower concentrations of all these parameters in Am lake are probably due to specificities of its catchment lithology. Phytoplankton taxa in the lakes are characterized by small chroococcales groups and desmids together with filamentous algae, more commonly observed in the dry season. The zooplankton community in the lakes is mainly dominated by rotifers, followed by cladocerans and copepods. Regarding species richness, zooplankton was highest in Vl, while phytoplankton is highest in TI1, and this aspect is most likely related to lake water levels.

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“…Therefore, geophysical methods are an extremely useful alternative, because they indirectly offer a large range of coverage during data collection and with low relative cost, directional information that contributes to the decision making and the creation of plans of activities more concise (Knödel et al, 2007;Redd & Adams, 2015). Besides the Brazilian legislation, in general, not consider geological heterogeneity, geomorphology and climate as a whole occurring in the country, which affect the dynamics of pollutants in subsurface (Ramos et al, 2016).…”

Section: Introductionmentioning

confidence: 99%

Environmental Geophysical Diagnosis of a Contaminated Area by Hydrocarbons in a Railway Accident in the Municipality of Botucatu - Sp

2018

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The diagnosis of contaminated areas is a mandatory procedure to treatment and remediation of soil and groundwater. Complex contaminants like hydrocarbons undergo physical and chemical changes along the dwell time in the geological environment, with changes in dissolution and spread in unsaturated and saturated soil aquifer system. This research describes the application of geophysical methods integrated with a history of chemical data in a contaminated area by leaked hydrocarborn in a railway accident, in 2005, at rural area in Botucatu (SP). The geophysical methods Electrical Resistivity and Induced Polarization were used by 5 parallel lines of electrical resistivity tomography in Schlumberger array, programmed and adjusted from a history of chemical analysis of groundwater. The electrical tomography data allowed thegeneration of 2D inversion models and visualization of 3D models. The data integrated analysis indicated the advanced state of degradation of hydrocarbons, recognized by high values of high chargeability in relation to the natural pattern of the area, concomitantly to areas of medium resistivity. This pattern may be indicative of the advanced state of degradation of the contaminants in the geological environment, with probable formation of sulphides resulting from the stabilization of the sulphur from the hydrocarbons and the iron present commonly found in tropical soils.RESUMOO diagnóstico de áreas contaminadas é um procedimento obrigatório ao tratamento e remediação de solo e águas subterrâneas. Contaminantes complexos como hidrocarbonetos passam por transformações físicas e químicas ao longo do tempo de permanência no ambiente geológico, com alterações no grau de dissolução no sistema aquífero. Este trabalho descreve a aplicação de métodos geofísicos integrados com um histórico de dados geoquímicos, numa área contaminada por hidrocarbonetos vazados num acidente ferroviário em 2005, na zona rural do município de Botucatu (SP). Foram utilizados os métodos geofísicos Eletrorresistividade e Polarização Induzida, por meio de 5 linhas paralelas de tomografia elétrica em arranjo Schlumberger, programadas e posicionadas a partir da interpretação de um histórico de análises geoquímicas do solo e água subterrânea. Os dados de tomografia elétrica permitiram a geração de modelos de inversão 2D e modelos de visualização 3D. A análise integrada de dados indica o avançado estado de degradação dos hidrocarbonetos, reconhecido por elevados valores de alta cargabilidade em relação ao padrão natural da área, concomitantemente a zonas de resistividade moderada. Este padrão pode ser um indicativo do avançado estado de degradação dos contaminantes no ambiente geológico, com provável neoformação de sulfetos oriundos estabilização do enxofre proveniente dos hidrocarbonetos e o ferro presente comumente encontrado em solos tropicais.

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Relationship between geological domain and physicochemical parameters in lotic system

Cited by 3 publications

References 21 publications

Using large, open datasets to understand spatial and temporal patterns in lotic ecosystems: NEON case studies

Using large, open datasets to understand spatial and temporal patterns in lotic ecosystems: NEON case studies

Limnological characteristics and planktonic diversity of five tropical upland lakes from Brazilian Amazon

Environmental Geophysical Diagnosis of a Contaminated Area by Hydrocarbons in a Railway Accident in the Municipality of Botucatu - Sp

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