Critical source area controls on water quality in an agricultural watershed located in the Chesapeake Basin

Pionke, H. B.; Gburek, William J.; Sharpley, Andrew N.

doi:10.1016/s0925-8574(99)00059-2

Cited by 262 publications

(173 citation statements)

References 22 publications

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“…Correl et al 1980;Neill 1989;Whitmore et al 1992;Burt et al 1993;Haycock 1995;Pekárová & Pekár 1996;Worral & Burt 1999;Pionke et al 2000;Ferrier 2001;Lenhart et al 2003;Matejicek et al 2003;Buck et al 2004;Doležal & Kvítek 2004;Oenema et al 2004;Poor et al 2007; Krause et al 2008). Higher nitrate amounts washed out of arable and together drained land (in comparison to other agricultural land use types) have several possible causes and explanations.…”

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confidence: 99%

Assessing the stream water quality dynamics in connection with land use in agricultural catchments of different scales

Fučík¹,

Kvítek²,

Lexa³

et al. 2008

Soil & Water Res.

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The ecological status of many surface waters in the Czech Republic is poor, mainly due to still relatively high discharges of N substances especially from agriculture. High nitrate values in the streams situated particulary in basins of drinking water reservoirs invoke the neccesity for the precise detection of diffuse pollution areas to enable the setting of the appropriate land management strategies or relevant measures. We introduce a simple method for estimating the changes of nitrate concentrations in surface waters regarding the land use modification. Stream and drainage water nitrate concentrations in prevailingly agricultural catchments of three different scales located in the Crystalline complex of the Czech massif were included in this study. Water quality samples were collected through the years 1992–2006 at monthly and bi-monthly intervals. For the catchment land use analysis, the satellite images LANDSAT 7 (CORINE Land Cover) and digitised cadastre maps of the land register were processed using ESRI ArcMap GIS; both sources corrected by field survey. We demonstrate on three different basin – scale studies a strong relation between the arable land ratio within a catchment and the coherent stream water nitrate concentration. The results acquired from all the evaluated catchments showed that every 10% decrease of ploughed land proportion in a catchment lowers the nitrate concentration C90 value (90% probability of non-exceedance) in average by 6.38 mg/l.

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confidence: 99%

Assessing the stream water quality dynamics in connection with land use in agricultural catchments of different scales

Fučík¹,

Kvítek²,

Lexa³

et al. 2008

Soil & Water Res.

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“…Losses of P originate from a small proportion of a catchment known as critical source areas (CSAs), where a high risk of P mobilization and transport coincides with high soil P content. Accurate identification of areas that contribute to such diffuse pollution in a catchment should be highly prioritized for control, treatment, and remediation purposes (Pionke et al 2000). This is in line with the EU Water Framework Directive (WFD) (2000/60/EC) requirement of cost-effective approaches in the process of achieving ''good ecological status'' of water bodies.…”

Section: Introductionmentioning

confidence: 82%

Screening risk areas for sediment and phosphorus losses to improve placement of mitigation measures

Villa

Djodjic

Bergström

et al. 2015

Ambio

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Identification of vulnerable arable areas to phosphorus (P) losses is needed to effectively implement mitigation measures. Indicators for source (soil test P, STP), potential mobilization by erosion (soil dispersion), and transport (unit-stream power length-slope, LS) risks were used to screen the vulnerability to suspended solids (SS) and P losses in two contrasting catchments regarding topography, soil textural distribution, and STP. Soils in the first catchment ranged from loamy sand to clay loam, while clay soils were dominant in the second catchment. Longterm SS and total P losses were higher in the second catchment in spite of significantly lower topsoil STP. A higher proportion of areas in the second catchment were identified with higher risk due to the significantly higher risk of overland flow generation (LS) and a significantly higher mobilization risk in the soil dispersion laboratory tests. A simple screening method was presented to improve the placement of mitigation measures.

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“…Na microbacia de Ribeirão Marins (SP), utilizada para atividades de agricultura e pecuária, foram encontrados valores de turbidez entre 9 e 19 UNT, no período seco, e de 15 a 26 UNT, no período chuvoso, além de concentrações de amônia e nitrato que ultrapassaram os valores máximos preconizados pela norma atribuídos ao aporte dos nutrientes provenientes do processo erosivo do solo e de lixiviações (LUCAS et al, 2010). Na bacia hidrográfica de Chesapeake, Estados Unidos, o uso de um terço da área com atividade agrícola foi responsável por um aporte de 58% de fósforo no rio, relacionado ao escoamento superficial do nutriente (PIONKE et al, 2000).…”

Section: Discussionunclassified

Qualidade da água em microbacias hidrográficas com agricultura nos municípios de Santarém e Belterra, Pará

2014

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RESUMO -A expansão da fronteira agrícola no Oeste do Pará nas últimas décadas tem alterado a paisagem, antes ocupada por florestas ou agricultura familiar, provocando alterações ambientais com impacto nos recursos hídricos. O trabalho avaliou a qualidade da água de 24 microbacias hidrográficas, sob diferentes usos de solo: área natural/referência (Flona Tapajós), agricultura tradicional (PA-Moju) e agriculturas mecanizadas recentes e antigas de soja (Rodovias Curuá-Una e BR-163, respectivamente), com base na Resolução Conama n° 357/05, em Santarém e Belterra, no Pará. As coletas ocorreram em outubro/11 e abril/12. Parâmetros analisados: pH, cor, turbidez, TDS, OD, DBO, nitrato, nitrito, nitrogênio amoniacal, fósforo total, clorofila-a e coliformes termotolerantes. Confrontando os resultados com os da Resolução, constatou-se no período seco que seis microbacias da Flona Tapajós e uma do PA-Moju apresentaram concentrações abaixo dos limites permissíveis para OD. Apenas uma microbacia (BR-163) apresentou pH no intervalo aceitável, e todas as microbacias do PA-Moju superaram o limite estabelecido para clorofila-a. A cor apresentou desconformidade em quatro microbacias da Curuá-Una, durante o período chuvoso. As atividades antrópicas estão causando assoreamento e aporte de compostos e nutrientes aos recursos hídricos, promovendo a sua degradação. A Resolução n° 357/05 necessita de adequações para a região Amazônica, visto que alguns parâmetros que apresentaram valores em desconformidade com a legislação refletem condições naturais da região.Palavras-chave: Recursos hídricos; Uso do solo; Limnologia. Santarém and Belterra (PA). The samples were collected in October/11 and April/12. Analyzed parameters: pH, color, turbidity, TDS, DO, BOD, nitrate, nitrite, ammonia nitrogen, total phosphorus, WATER QUALITY IN MICRO WATERSHEDS WITH AGRICULTURE IN THE MUNICIPALITIES OF SANTARÉM AND BELTERRA, PARÁ

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Critical source area controls on water quality in an agricultural watershed located in the Chesapeake Basin

Cited by 262 publications

References 22 publications

Assessing the stream water quality dynamics in connection with land use in agricultural catchments of different scales

Assessing the stream water quality dynamics in connection with land use in agricultural catchments of different scales

Screening risk areas for sediment and phosphorus losses to improve placement of mitigation measures

Qualidade da água em microbacias hidrográficas com agricultura nos municípios de Santarém e Belterra, Pará

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