El-Niño/Southern Oscillation (ENSO) influences on monthly NO3 load and concentration, stream flow and precipitation in the Little River Watershed, Tifton, Georgia (GA)

Keener, V. W.; Feyereisen, Gary W.; Lall, Upmanu; Jones, James W.; Bosch, David D.; Lowrance, Richard

doi:10.1016/j.jhydrol.2009.12.008

Cited by 65 publications

(53 citation statements)

References 37 publications

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“…Neste sentido, a compreensão de alterações hidrológicas em escala regional é importante para entender os fenô-menos de escala global, e vice-versa. E sob este foco, cabe destaque à Região Amazônica, que tem se tornado alvo de diversas pesquisas, sobretudo por suas particularidades climáticas e influência sobre o clima de outras regiões (Parthasarathy e Dhar, 1976;Marengo e Nobre, 2009;Keener et al, 2010;Sonali e Kumar, 2013;Coopersmith et al, 2014).…”

Section: Introductionunclassified

Detecção de Tendências Monotônicas Temporais e Relação com Erros dos Tipos I e II: Estudo de Caso em Séries de Precipitações Diárias Máximas Anuais do Estado do Acre

Moreira

Naghettini

2016

Rev. bras. meteorol.

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ResumoAtualmente, é quase consenso que mudanças climáticas estão acontecendo e, provavelmente, se intensificarão no futuro. Com isso, os testes estatísticos para detecção de tendências em séries de observações de variáveis hidrológicas tornaram-se ferramentas importantes para a construção e melhoramento dos modelos de predição e de planos de preparação da sociedade para os possíveis impactos causados por eventos extremos. Sob este foco, o presente artigo busca discutir uma metodologia proposta recentemente para a detecção de tendências, à luz dos erros do tipo I e II associados a testes de significância estatística, e comparar com o teste não paramétrico de Mann-Kendall, complementado pelo estimador de declive de Sen. Contempla, ainda, um estudo de caso nas três principais séries de precipitações diárias máximas anuais do estado do Acre, Brasil. Os resultados evidenciaram tendência significativamente crescente apenas para a série de observações localizada em Tarauacá, um dos municípios do estado em questão, e que dispõe de uma estação meteorológica de referência. Palavras-chave: detecção de tendências, erros do tipo I e tipo II, séries de precipitações máximas. Detecting Monotonous Time Trends as Related to Type I and Type II Errors: Case Study in Annual Maximum Daily Precipitation Series Observed in the State of Acre AbstractClimate changes are taking place and will probably be reinforced in the future. In such a context, statistical tests for detecting trends in time series of hydrologic observations are certainly important tools for building and improving prediction models and societal preparedness plans to deal with possible impacts from extreme events. This paper focuses on discussing a recent method proposed for detecting monotonous trends in time series by accounting for both type I and type II errors, and comparing its results with the conventional Mann-Kendall nonparametric test, as complemented by Sen slope estimator, following application to the three main series of annual maximum daily rainfall observed in the Brazilian state of Acre. The results point out a significant increasing tendency for the series observed at the raingauge of Tarauacá.

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Section: Introductionunclassified

Detecção de Tendências Monotônicas Temporais e Relação com Erros dos Tipos I e II: Estudo de Caso em Séries de Precipitações Diárias Máximas Anuais do Estado do Acre

Moreira

Naghettini

2016

Rev. bras. meteorol.

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“…We calculate the mean of the values for each depth at the MAWSS source water intake (cell 34,18). To assess model performance we calculate absolute mean error (AME), fractional AME and percent bias (PBIAS) performance ratings (Table 3).…”

Section: Model Calibration and Validation Statisticsmentioning

confidence: 99%

Impacts of Forest to Urban Land Conversion and ENSO Phase on Water Quality of a Public Water Supply Reservoir

Elias

Rodriguez

Srivastava

et al. 2016

Forests

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Abstract:We used coupled watershed and reservoir models to evaluate the impacts of deforestation and l Niño Southern Oscillation (ENSO) phase on drinking water quality. Source water total organic carbon (TOC) is especially important due to the potential for production of carcinogenic disinfection byproducts (DBPs). The Environmental Fluid Dynamics Code (EFDC) reservoir model is used to evaluate the difference between daily pre-and post-urbanization nutrients and TOC concentration. Post-disturbance (future) reservoir total nitrogen (TN), total phosphorus (TP), TOC and chlorophyll-a concentrations were found to be higher than pre-urbanization (base) concentrations (p < 0.05). Predicted future median TOC concentration was 1.1 mg¨L´1 (41% higher than base TOC concentration) at the source water intake. Simulations show that prior to urbanization, additional water treatment was necessary on 47% of the days between May and October. However, following simulated urbanization, additional drinking water treatment might be continuously necessary between May and October. One of six ENSO indices is weakly negatively correlated with the measured reservoir TOC indicating there may be higher TOC concentrations in times of lower streamflow (La Niña). There is a positive significant correlation between simulated TN and TP concentrations with ENSO suggesting higher concentrations during El Niño.

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“…Sun and Furbish (1997) statistically analyzed the response of annual precipitation and river discharges to El Niño and La Niña in Florida. For instance, Keener et al (2010) examined the influence of ENSO on monthly NO 3 load and concentration, stream flow and precipitation in the Little River Watershed, Tifton, Georgia, and discovered a lag of two months between SST anomalies and streamflows. Wossenu and Trimble (2010) evaluated the relationships between ENSO indices and South Florida hydrology using correlation.…”

Section: Effects In Southeastern United Statesmentioning

confidence: 99%

“…Wossenu and Trimble (2010) evaluated the relationships between ENSO indices and South Florida hydrology using correlation. The southeastern United States is an important region both economically, agriculturally and socially, due to its rapidly growing population that will add water demand and environmental stress to currently stressed or degraded ecosystems (Keener et al, 2010). Other studies have also assessed lag correlations between ENSO and streamflows in other parts of Southeastern United States.…”

Section: Effects In Southeastern United Statesmentioning

confidence: 99%

Effects of El-Niño and La-Niña Sea Surface Temperature Anomalies on Annual Precipitations and Streamflow Discharges in Southeastern United States

Clark

Nnaji

Huang

2014

Journal of Coastal Research

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El-Niño/Southern Oscillation (ENSO) influences on monthly NO3 load and concentration, stream flow and precipitation in the Little River Watershed, Tifton, Georgia (GA)

Cited by 65 publications

References 37 publications

Detecção de Tendências Monotônicas Temporais e Relação com Erros dos Tipos I e II: Estudo de Caso em Séries de Precipitações Diárias Máximas Anuais do Estado do Acre

Detecção de Tendências Monotônicas Temporais e Relação com Erros dos Tipos I e II: Estudo de Caso em Séries de Precipitações Diárias Máximas Anuais do Estado do Acre

Impacts of Forest to Urban Land Conversion and ENSO Phase on Water Quality of a Public Water Supply Reservoir

Effects of El-Niño and La-Niña Sea Surface Temperature Anomalies on Annual Precipitations and Streamflow Discharges in Southeastern United States

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