Selecting a calculation method to estimate sediment and nutrient loads in streams: Application to the Beaurivage River (Québec, Canada)

Quilbé, Renaud; Rousseau, Alain N.; Duchemin, Marc; Poulin, Annie; Gangbazo, G.; Villeneuve, Jean‐Pierre

doi:10.1016/j.jhydrol.2005.11.008

Cited by 203 publications

(178 citation statements)

References 31 publications

Supporting

Mentioning

159

Contrasting

Unclassified

Order By: Relevance

“…catchments which cover a range of land use from forest, low-density suburban, urban and agriculture. We estimated total nitrogen (TN) and NO 3 À concentrations for nonsampled days using a bin-averaging approach, similar to that described by Groffman et al [2004] (working on these same watersheds) and Quilbé et al [2006]. In this method, concentrations of NO 3 À and TN samples are sorted and grouped by discharge to generate bins with a minimum of three samples.…”

Section: Total Nitrogen and No 3 à Load Estimates And Cumulative Freqmentioning

confidence: 99%

Streamflow distribution of non–point source nitrogen export from urban‐rural catchments in the Chesapeake Bay watershed

Shields

Band

Law

et al. 2008

Water Resources Research

144

122

View full text Add to dashboard Cite

[1] Nitrogen (N) export from urban and urbanizing watersheds is a major contributor to water quality degradation and eutrophication of receiving water bodies. Methods to reduce N exports using best management practices (BMP) have targeted both source reduction and hydrologic flow path retention. Stream restoration is a BMP targeted to multiple purposes but includes increasing flow path retention to improve water quality. As restorations are typically most effective at lower discharge rates with longer residence times, distribution of N load by stream discharge is a significant influence on catchment nitrogen retention. We explore impacts of urbanization on magnitude and export flow distribution of nitrogen along an urban-rural gradient in a set of catchments studied by the Baltimore Ecosystem Study (BES). We test the hypotheses that N export magnitude increases and cumulative N export shifts to higher, less frequent discharge with catchment urbanization. We find that increasing development in watersheds is associated with shifts in nitrogen export toward higher discharge, while total magnitude of export does not show as strong a trend. Forested reference, low-density suburban, and agricultural catchments export most of the total nitrogen (TN) and nitrate (NO 3 À ) loads at relatively low flows. More urbanized sites export TN and NO 3 À at higher and less frequent flows. The greatest annual loads of nitrogen are from less developed agricultural and low-density residential (suburban/exurban) areas; the latter is the most rapidly growing land use in expanding metropolitan areas. A simple statistical model relating export distribution metrics to impervious surface area is then used to extrapolate parameters of the N export distribution across the Gwynns Falls watershed in Baltimore County. This spatial extrapolation has potential applications as a tool for predictive mapping of variations in export distribution and targeting stream channel restoration efforts at the watershed scale.

show abstract

Section: Total Nitrogen and No 3 à Load Estimates And Cumulative Freqmentioning

confidence: 99%

Streamflow distribution of non–point source nitrogen export from urban‐rural catchments in the Chesapeake Bay watershed

Shields

Band

Law

et al. 2008

Water Resources Research

144

122

View full text Add to dashboard Cite

show abstract

“…Esses métodos se fundamentam nas séries de dados disponíveis ou em equações de regressão (Quilbé et al, 2006;Littlewood, 1995).…”

Section: Methodsunclassified

Transporte de ortofosfato e de nitrato na microbacia do Ribeirão Fortuna, SC

Pinheiro

Deschamps

2008

Rev. bras. eng. agríc. ambient.

View full text Add to dashboard Cite

RESUMOEste trabalho foi a base primeira para se determinar o transporte de ortofosfato e nitrato no escoamento da microbacia do Ribeirão Fortuna, situada no município de Timbó, SC, como parte do Projeto Microbacias desenvolvido pela EPAGRI, em Santa Catarina. As coletas foram realizadas em quatro seções fluviométricas do curso de água principal e analisadas as concentrações das substâncias de interesse. Utilizou-se o modelo hidrológico IPHS1 para simulação do processo de transformação da precipitação em vazão, enquanto os parâmetros do modelo foram calibrados para uma estação fluviométrica, localizada nas proximidades e que possui série histórica de vazões médias diárias. Calcularam-se as cargas transportadas e se estabeleceram correlações entre as vazões escoadas e as cargas de ortofosfatos e nitratos. Constatou-se que as cargas específicas de ortofosfato são superiores às de nitrato e a área ocupada pelas culturas anuais e campo/ pastagem na bacia explica as cargas anuais específicas estimadas de ortofosfato, porém, o uso do solo agrícola nas subbacias não está relacionado com o transporte de nitratos na rede de drenagem. Palavras-chave: perdas de nutrientes, escoamento superficial, bacia agrícolaTransportation of orthophosphate and nitrate in Ribeirão Fortuna microbasin, SC, Brazil ABSTRACTThe objective of this work was to determine the orthophosphate and nitrate loads in runoff at the Ribeirão Fortuna microbasin, located in the municipality of Timbó, in Itajaí basin. This micro-basin was monitored by the Micro-basin Project, developed by EPAGRI, in the state of Santa Catarina, Southern Brazil. Samples were collected in four fluviometric sections along the main water course and substance concentrations were analysed. The IPHS1 hydrologic model was used for simulating the transformation process of precipitation in discharge. Model parameters were calibrated for a fluviometric station located nearby, which has a historical series of daily average discharge. The annual loads were calculated and correlations were established between the runoff discharge and orthophosphate and nitrate loads. It was noticed that the orthophosphate specific loads are superior to the nitrate ones and the occupied area for the annual crops and pasture in the basin explains the yearly estimated specific phosphate loads. Nevertheless, the use of the agricultural soil in the subbasins is not related to the nitrate loads in the drainage network.

show abstract

“…The estimation of pollutant loads is of crucial importance to evaluate the water quality, understand the processes, and identify the pollutant sources (QUILBÉ et al, 2006). Nevertheless, most of water quality monitoring programs evaluate concentration parameters, but do not monitor the discharge, which makes it more difficult to estimate the loads carried along the catchment basin (ZUCCO et al, 2012).…”

Section: Introductionmentioning

confidence: 99%

Trend analysis of the load and concentration of physical, chemical and biological parameters in the Verde River Basin

Pinto

Andrade

Pinto

et al. 2017

RBRH

View full text Add to dashboard Cite

The estimation of loads of pollutants is of crucial interest to identify the level of water quality, understand the processes and identify the sources of pollution. The aim of this study was to calculate time trends of loads and concentrations of eleven physical, chemical and biological parameters, in nine quality monitoring stations of the Verde River Basin from 2008 to 2014. The time series analysis was performed with different tests. First, with the verification of autocorrelation of the time series using the Spearman correlation test. Then, Kruskal-Wallis test was used to check significant differences between the seasons and, afterwards the Mann-Kendall or the Seasonal Mann-Kendall time trend tests were applied accordingly. The analysis results indicated differences between the spatial distribution of loads and concentrations for most of the parameters evaluated in this study. The results showed that the simultaneous analysis of concentration data and flow data is essential for a more comprehensive and reliable evaluation of water quality, since the changes in river flow over time can mislead the interpretation of the concentration data. Moreover, to analyze only the pollutant load data, without looking how the flow and concentration behaves, does not provide conclusive results, since it does not allow to evaluate whether changes in the load values were caused by alterations of the flow or concentration. Thus, the results indicate the need to monitor water quality along with flow measurement, providing more complete and reliable assessments of the evolution of water quality.Keywords: Trend analysis; Water quality; Pollutants concentration and load. RESUMOA estimativa das cargas poluentes é de interesse crucial para identificar o nível de qualidade da água, entender os processos e identificar as fontes de poluição. O objetivo deste estudo foi calcular as tendências temporais das cargas e concentrações de onze parâmetros físicos, químicos e biológicos, em nove estações de monitoramento de qualidade da água da bacia hidrográfica do rio Verde, no período de 2008 a 2014. A análise das séries temporais foi realizada a partir da verificação da autocorrelação da série temporal utilizando-se o teste de correlação de Spearman, teste de Kruskal-Wallis para verificação de diferenças significativas entre as estações do ano e os testes de Mann-Kendall e Sazonal Mann-Kendall para análises de tendência temporal. As análises indicaram diferenças entre a distribuição espacial da carga e da concentração para a maioria dos parâmetros avaliados neste estudo. Os resultados demostraram que a análise conjunta de dados de concentração e vazão é essencial para uma avaliação mais abrangente e fidedigna da qualidade da água, pois alterações no fluxo do rio ao longo do tempo podem dificultar a interpretação dos dados de concentrações. Verificou-se ainda que a análise de dados de carga dos poluentes, sem o estudo do comportamento da vazão e da concentração não fornece resultados conclusivos, visto que não permite avaliar a influê...

show abstract

Selecting a calculation method to estimate sediment and nutrient loads in streams: Application to the Beaurivage River (Québec, Canada)

Cited by 203 publications

References 31 publications

Streamflow distribution of non–point source nitrogen export from urban‐rural catchments in the Chesapeake Bay watershed

Streamflow distribution of non–point source nitrogen export from urban‐rural catchments in the Chesapeake Bay watershed

Transporte de ortofosfato e de nitrato na microbacia do Ribeirão Fortuna, SC

Trend analysis of the load and concentration of physical, chemical and biological parameters in the Verde River Basin

Contact Info

Product

Resources

About