Spatial and Temporal Correlation of Water Quality Parameters of Produced Waters from Devonian-Age Shale following Hydraulic Fracturing

Barbot, Elise; Vidic, Natasa S.; Gregory, Kelvin B.; Vidić, Radisav D.

doi:10.1201/b18648-5

Cited by 31 publications

(56 citation statements)

References 11 publications

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“…These differences are likely due to amounts of U-and Th-enriched materials within reservoirs, rather than bulk strata, which are the major source of high NORM activities in formation water. Mixing with lower NORM fracturing fluids may be another factor [47]. Compared with the USA, the lower radioactivity level of the formation water in the study area will lead to less contamination of soil and shallow groundwater if a contamination happens in the same possible way [1,48].…”

Section: Radioactivity Of Watermentioning

confidence: 99%

Radioactivity of Soil, Rock and Water in a Shale Gas Exploitation Area, SW China

Huang

Hao

Pang

et al. 2017

Water

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Abstract:Studies have been carried out to investigate the baseline radioactivity level (gross alpha, gross beta and 226 Ra) of soil, rocks and groundwater in the Fuling block, Chongqing, the largest shale gas exploitation area of China. The results show that there is a general activity concentration trend of gross alpha, gross beta and 226 Ra: shale > soil > limestone due to the high content of uranium, thorium and potassium in shale and low content in limestone. The average activities of shallow groundwater from a limestone aquifer are 0.14, 0.13 and <0.008 Bq/L for gross alpha, gross beta and 226 Ra, respectively. The radioactivity concentrations of gross alpha, gross beta and 226 Ra (4.37, 1.40 and 0.395 Bq/L, respectively) of the formation water were far lower than those of formation water in the Marcellus shale in the USA (with ranges of 86-678, 23-77 and 16-500 Bq/L, respectively). One polluted shallow groundwater source and its associated stream sediments had been polluted due to leakage of drilling fluid with relatively high radioactivity levels and high concentration of main ions. Overall, this study provides an important baseline radioactivity level to assess the impact of shale gas exploitation on a shallow environment.

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Section: Radioactivity Of Watermentioning

confidence: 99%

Radioactivity of Soil, Rock and Water in a Shale Gas Exploitation Area, SW China

Huang

Hao

Pang

et al. 2017

Water

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“…Contudo, o predomínio de fenômenos de advecção ou difusão, além dos relevantes aspectos de comprimento ou zona de mistura, ao longo de rio são dependentes de características peculiares do mesmo, como a morfologia, sinuosidade, declividade, velocidade do escoamento, etc. Distintos trabalhos versam sobre a variabilidade sazonal de parâmetros de qualidade de corpos hídricos ou mesmo sobre a variabilidade especial ao longo de um rio (CAMPANHA et al, 2010;COELHO;KISHI, 2011;SANTI et al, 2012;BARBOT et al, 2013), ou ainda quanto a uma otimização da localização amostral ao longo do rio (MEMARZADEH et al, 2013) e da frequência do monitoramento (LIU et al, 2013). Contudo, pouco se discute sobre a variabilidade espacial ao longo de uma seção transversal de rio.…”

Section: Introductionunclassified

Variabilidade Espaço-Temporal De Parâmetros De Qualidade Da Água Ao Longo De Seção De Monitoramento Do Rio Iguaçu

Gonçalves

Fernandes

2017

Rev. Agro. Amb.

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RESUMO:As NBRs nº 9.897 (ABNT, 1987a) e nº 9.898 (ABNT, 1987b) auxiliam no monitoramento de recursos hídricos de modo a sugerir a localização e o número de postos amostrais, inclusive aqueles ao longo de uma seção transversal do rio que variam conforme a sua largura e profundidade. Contudo, diante da complexidade e dos recursos necessários à prática de monitoramento de rios, é comum sacrificar tal amostragem para fazê-la de uma margem do rio. Para verificar o grau de influência do local de amostragem, avaliou-se neste trabalho a variação de concentrações de parâmetros de qualidade da água ao longo de uma seção transversal de rio, em diferentes condições hidrológicas. Para tanto, foram monitorados cinco pontos amostrais distribuídos ao longo da seção de estudo. Concluiu-se que houve elevada dispersão ao longo da seção de rio quanto aos parâmetros orgânicos, e uma tendência particular de distribuição gradual da concentração para cada parâmetro de DBO e DQO. Contudo, a Análise de Variância permite afirmar que não houve diferenças significativas entre os pontos amostrais. Com base no exposto, não houve impactos negativos à gestão de recursos hídricos decorrentes de informações de qualidade da água amostradas às margens do rio. Assim, para este estudo de caso, o número de pontos amostrais sugerido pela norma supracitada pode ser simplificado em um único ponto na seção de monitoramento. PALAVRAS-CHAVE:Análise de variância; DBO; Dispersão amostral. SPACE-TIME VARIABILIT Y OF WATER QUALIT Y PARAMETERS THROUGHOUT THE MONITORED SEGMENT OF THE RIVER IGUAÇUABSTRACT: NBRs n. 9.897 (ABNT, 1987a) and n. 9.898 (ABNT, 1987b) are a help

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“…hydraulic fracturing). Several studies have documented the negative impacts that oil and gas development can have on the environment (Barbot, Vidic, Gregory, & Vidic, 2013;Entrekin, Evans-White, Johnson, & Hagenbuch, 2011;Gregory, Vidic, & Dzombak, 2011;Johnson et al, 2010;Kargbo, Wilhelm, & Compbell, 2010;Marcellus Shale Advisory Commission, 2011;Nicot & Scanlon, 2012;US EPA, 2011;Vidic, Brantley, Vandenbossche, Yoxtheimer, & Abad, 2013). For instance, Johnson et al (2010) estimates that about 12 ha of forest are affected for every Marcellus Shale extraction site, including well pads, roads, pipes and a buffer zone.…”

Section: Introductionmentioning

confidence: 99%

Forest cover changes due to hydrocarbon extraction disturbance in central Pennsylvania (2004–2010)

et al. 2016

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The state of Pennsylvania has a long history of oil and gas extraction. In recent years with advances in technology such as hydraulic fracturing, hydrocarbon sources that were not profitable in the past are now being exploited. Here, we present an assessment of the cumulative impact of oil and gas extraction activities on the forests of 35 counties in Pennsylvania and their intersecting sub-watersheds between 2004 and 2010. The assessment categorizes counties and sub-watersheds based on the estimated amount of change to forest cover in the area. From the data collected we recognize that although forest cover has not been greatly impacted (with an average loss of percent forest coverage of 0.16% at the county level), landscape structure is affected. Increase in edge forest and decrease in interior forest is evident in many of the counties and sub-watersheds examined. These changes can have a detrimental effect on forest biodiversity and dynamics.ARTICLE HISTORY

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Spatial and Temporal Correlation of Water Quality Parameters of Produced Waters from Devonian-Age Shale following Hydraulic Fracturing

Cited by 31 publications

References 11 publications

Radioactivity of Soil, Rock and Water in a Shale Gas Exploitation Area, SW China

Radioactivity of Soil, Rock and Water in a Shale Gas Exploitation Area, SW China

Variabilidade Espaço-Temporal De Parâmetros De Qualidade Da Água Ao Longo De Seção De Monitoramento Do Rio Iguaçu

Forest cover changes due to hydrocarbon extraction disturbance in central Pennsylvania (2004–2010)

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