Influence of hydroclimatic variations on solute concentration dynamics in nested subtropical catchments with heterogeneous landscapes

Piazza, Gustavo Antônio; Dupas, Rémi; Gascuel‐Odoux, Chantal; Grimaldi, C.; Pinheiro, Adílson; Kaufmann, Vander

doi:10.1016/j.scitotenv.2018.03.394

Cited by 15 publications

(19 citation statements)

References 42 publications

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“…However, the occurrence of rainfall is well distributed throughout the year. Although summer is the wet season, the average river flow is low then, compared to winter, since summer is also responsible for the highest evapotranspiration rates (PIAZZA et al, 2018). The catchment climate is determined by the Serra Geral, which separates the coastal plain from an interior plateau, and it is characterised as humid subtropical (Köppen's Cfa), with an annual average temperature of 20°C.…”

Section: Study Sitementioning

confidence: 99%

“…The monitoring frequency of suspended sediment and nutrients was biweekly and did not consider baseflow or storm conditions. Local sediment transport processes and quality in streams are complex in this region, with correlations between concentrations of chemical species and variations in meso-scale indices, such as the El-Nino-South Oscillation (ENOS) (PIAZZA et al, 2018). The low Nash coefficient indicates precaution concerning the model's results for suspended sediments and chemical species used for characterisation purposes.…”

Section: /12mentioning

confidence: 99%

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Scenarios from the Eta Model on quality and hydrological quantity in the Atlantic Forest, Southern Brazil

Pinheiro

Kaufmann

Piazza

et al. 2019

RBRH

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This work evaluated the response of two scenarios (4.5 and 8.5) of the Eta Model on the quality (sediment - TSS, nitrate - NO3- and phosphate - PO43-) and quantity (flow - Q) of the Concordia Catchment in the Atlantic forest biome. The importance of the work lies in the comparison of both scenarios until 2099, using current agricultural practices (2016). The SWAT model normally used for hydrological purposes has been applied to evaluate water quality from the monitoring programme database (2010-2014). Q showed a non-accentuated, upward trend. Modifications in Q were transmitted to TSS and PO43-. There was no significant difference between the tested scenarios.

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Section: Study Sitementioning

confidence: 99%

Section: /12mentioning

confidence: 99%

Scenarios from the Eta Model on quality and hydrological quantity in the Atlantic Forest, Southern Brazil

Pinheiro

Kaufmann

Piazza

et al. 2019

RBRH

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“…High-frequency field campaigns during rainstorms are thus necessary to analyze the dynamic response of chemical compositions to hydrological variations and its potential effects on water quality as well as public health. The dynamic behaviors and corresponding controls of hydrochemistry in river and/or groundwater have been reported (Koger et al, 2018;Piazza et al, 2018;Correa et al, 2019). However, there are few studies conducting high-frequency sampling to analyze hydrochemistry in both surface water and groundwater in karst regions of Southwest China.…”

Section: Introductionmentioning

confidence: 99%

Hydrogeochemical Dynamics and Response of Karst Catchment to Rainstorms in a Critical Zone Observatory (CZO), Southwest China

Qin

Ding

et al. 2020

Front. Water

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Karst water is vital for local drinking and irrigation but is susceptible to contamination. Hydrochemistry, which is highly related to carbonate weathering in karst catchments, can affect water quality and respond rapidly to climate change. In order to explore hydrogeochemical sources, dynamics, and their responses to rainstorms, rainwater, throughfall, hillslope runoff, surface water, and groundwater were sampled synchronously during rainstorms at a karst Critical Zone Observatory (CZO), Southwest China. Results showed that the total dissolved solids (TDS) concentration in throughfall increased by 30.1 ± 8.0% relative to rainwater, but both throughfall and rainwater contributed little to TDS in surface water and groundwater compared with terrestrial sources. Hydrochemistry in surface water and groundwater was diluted by rainstorms but displayed chemostatic responses with different intensities to increasing discharge. This is possibly regulated by hydrogeological conditions, available sources of various solutes, and the difference between solute concentrations before and after rainstorms. Ca2+ and Mg2+ dynamics were mainly regulated by carbonate weathering, gypsum dissolution, and gypsum-induced dedolomitization (geological sources), which also affect Ca2+, Mg2+, and SO42- in deep confined groundwater draining a gypsum stratum. For HCO3-, CO2 from respiration and microbiologic activities is one dominant contributor, especially for spring. The chemostatic behaviors of NO3-, Cl−, and K+ were related to agricultural activities, especially in surface water. These controls on hydrochemistry may already exist as hillslope runoff occurs, which has be further demonstrated by principle component analysis (PCA). The heterogeneous permeability of epikarst can affect the mixture of groundwater from different sources and flowing pathways, enabling hydrochemistry at different hydrogeological conditions to display discrepant responses to rainstorms. The epikarst aquifer with high permeability is susceptible to changes in external environment, such as rainstorms and agricultural activities, increasing the potential risk of water environment problems (chronic pollution of nitrogen and high hardness of water) during a certain period. Drinking water safety thus deserves consideration in the agricultural karst catchment.

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“…A qualidade da água superficial está relacionada à condicionantes naturais como regime de chuvas, geologia, escoamento superficial, cobertura florestal. Assim como as condicionantes antrópicas como lançamento de efluentes, tanto de fontes pontuais como difusas, manejo do solo, entre outros (AGÊNCIA NACIONAL DE ÁGUAS, 2017;PIAZZA et al, 2018).…”

Section: Introductionunclassified

“…O monitoramento ambiental de longo prazo possibilita o conhecimento de tendências de evolução da qualidade, viabilizando o diagnóstico do corpo de água (PIAZZA et al, 2018). Com o intuito de traçar os planos de ação, para implementar a governança dos recursos hídricos, é necessário saber a qualidade atual e o uso previsto para as águas, para que se possa estabelecer os requisitos necessários de melhoria.…”

Section: Introductionunclassified

Parâmetros De Qualidade De Água De Rios E Efluentes Presentes Em Monitoramentos Não Sistemáticos

Girardi

2019

REGA

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Este é um artigo publicado em acesso aberto (Open Access) sob a licença Creative Commons Attribution, que permite uso, distribuição e reprodução em qualquer meio, sem restrições desde que o trabalho original seja corretamente citado.REGA, v. 16, e2, 2019 | https://doi.RESUMO: Nas últimas décadas, tem sido consenso que as atividades humanas degradam a qualidade das águas superficiais e subterrâneas. O Brasil possui problemas de escassez de dados de qualidade da água. O presente trabalho possui o intuito de analisar os parâmetros utilizados nos monitoramentos não sistemático da qualidade da água de rios e efluentes na Bacia Hidrográfica do Rio Itajaí (BHRI). A partir destes dados, foi possível verificar os parâmetros mais frequentes e confrontar os mesmos com a legislação vigente. Foram avaliados 4947 laudos de 216 empresas, totalizando 250 parâmetros. Dos parâmetros solicitados pelos órgãos ambientais e que não constam nas legislações, destacaram-se pela quantidade de análises realizadas a demanda química de oxigênio (DQO), sólidos sedimentáveis, cor aparente, nitrogênio Kjedahl, coliformes totais e ferro total. Constatou-se a falta de informação sobre a vazão de lançamento dos efluentes, assim como, da qualidade da água dos corpos receptores após a zona de mistura. Percebeuse a necessidade de realinhamento dos procedimentos operacionais dentro dos órgãos de fiscalização, alinhando a exigência dos parâmetros com a legislação vigente. Além de aprimorar a uniformidade entre os parâmetros e periodicidade requerida das empresas. Em relação à normatização, os laboratórios também precisam adotar metodologias padronizadas de monitoramento e métodos de análise. Palavras-chave:Gestão integrada de recursos hídricos, legislação ambiental, CONAMA 357, CONAMA 430, poluição hídrica. ABSTRACT:In the last decades, there is an agreement that the human activities degrade the superficial and underground quality water. Brazil has problems with water quality shortage data in some regions. This work analyzes which parameters are monitored of water quality in rivers and wastewater in the Rio Itajaí Watershed. With this information, we discovered the most frequently parameters and confront with current legislation. We evaluated 4947 reports of 216 companies, totalizing 250 parameters. Into the parameters requested to the environmental organization and are not in the legislation, highlighting to be COD, settleable solids, apparent color, Kjedahl nitrogen, total coliform, and total iron. We constated lack of data about wastewater flow, as soon as, the courses water quality after mixing zone. We detected the necessity to standardization operational procedure inside of government organisms, lining the parameters solicited with legislation. Moreover, it is important improves the uniformity of parameters and periodicity between corporations. About uniformization, the laboratories need adopt standard methodology, especially to monitoring and analysis.

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Influence of hydroclimatic variations on solute concentration dynamics in nested subtropical catchments with heterogeneous landscapes

Cited by 15 publications

References 42 publications

Scenarios from the Eta Model on quality and hydrological quantity in the Atlantic Forest, Southern Brazil

Scenarios from the Eta Model on quality and hydrological quantity in the Atlantic Forest, Southern Brazil

Hydrogeochemical Dynamics and Response of Karst Catchment to Rainstorms in a Critical Zone Observatory (CZO), Southwest China

Parâmetros De Qualidade De Água De Rios E Efluentes Presentes Em Monitoramentos Não Sistemáticos

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