Contribution of point sources and diffuse sources to nitrogen and phosphorus loads in lowland river tributaries

Pieterse, N.M.; Bleuten, W.; Jørgensen, Sven Erik

doi:10.1016/s0022-1694(02)00350-5

Cited by 148 publications

(96 citation statements)

References 43 publications

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“…Based on the results of model calibration for canals T1 and T4, the export coefficient (loading factor) was estimated at 17.86 kg N/ha-yr and 0.21 kg P/ha-yr (Table 4). The export coefficients in the river Dommel watershed (Netherlands and Belgium) for N and P, reported by Pieterse et al (2003), were 24.21 kg/ha-yr and 0.82 kg/ha-yr, respectively. These values are higher compared to those of the present study, probably due to the application rates in Dommel area (448 kg N/ha-yr and 76 kg P/ha-yr), which exceeded the rates in our study area.…”

Section: Estimation Of Nutrient Loads From Non-point Sources Into Thementioning

confidence: 98%

Water Quality of Drainage Canals and Assessment of Nutrient Loads Using QUAL2Kw

Gikas

2014

Environ. Process.

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The water quantity and quality in two of the four main drainage canals located in the plain of Chryssoupolis in Kavala, North Greece, are studied. The area is intensively used for agriculture. Irrigation water is supplied by Nestos River, using a network of irrigation canals. Drainage water and irrigation return flows are collected in the four main drainage canals, which outflow into the Thracian Sea, North Aegean. A monitoring program in the four canals was designed to monitor flow and main constituents of drainage water. Main pollutants included nitrate, phosphorus and suspended solids. Based on the collected data, the trophic state of the canals and its seasonal variation were assessed, and the limiting nutrient was identified. QUAL2Kw was also used to model flow and water quality in two of the four canals. The calibration and verification of QUAL2Kw was undertaken using the collected field data, in an effort to identify the pollution sources and propose future management actions for the improvement of drainage canal water quality. The results showed that QUAL2Kw is a useful tool to simulate water quality in rivers and canals, and to quantify the impacts of non-point source pollution from agricultural areas.

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Section: Estimation Of Nutrient Loads From Non-point Sources Into Thementioning

confidence: 98%

Water Quality of Drainage Canals and Assessment of Nutrient Loads Using QUAL2Kw

Gikas

2014

Environ. Process.

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“…En la práctica, la dosis de fertilizante nitrogenado mineral disminuyó de 115 kg ha -1 a 93 kg ha -1 de N, indicando una reducción de 20% en los últimos 20 años (FEDERAL STATISTICAL OFFICE, 1992-2011. Además, con el objetivo de mejorar la calidad del agua, se implementaron muchas obras en los cauces y márgenes de los ríos para evitar la erosión, como por ejemplo la restauración de la vegetación en las riberas (POTT et al, 2012).…”

Section: Aspectos De La Problemática Del N E La Comunidad Europeaunclassified

“…Las aguas residuales de origen doméstico e industrial son las principales fuentes puntuales de contaminación (SCHMALZ et al, 2007). La contaminación difusa contribuye ocurre a través de diversas formas y dependen en gran medida del uso y manejo del suelo (PIETERSE et al, 2003;SILEIKA et al, 2006;KRONVANG et al, 2008;LASSALETTA et al, 2009;ROTHWELL et al, 2010;TAO et al, 2010). El N es el nutriente más utilizado en la agricultura para garantizar la productividad de la mayoría de los cultivos (HATCH et al, 2002;RATHKE et al, 2005).…”

Section: Introductionunclassified

O desafio do manejo do nitrogênio no contexto da produtividade agricola e da vulnerabilidade ambiental

Bravo

Pott

Jadoski

2011

PAeT

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“…Many substances are potential pollutants: nutrients used in agricultural systems (Lam et al, 2012;Pieterse et al, 2003), heavy metals (Chon et al, 2012) and pesticides .…”

Section: Introductionmentioning

confidence: 99%

“…Diffuse sources contribute through many different pathways and are highly dependent on land use and management (Kronvang et al, 2008;Pieterse et al, 2003). The application of N fertilizer in agriculture and pasture areas is the major source of diffuse pollution (Jarvie et al, 2010;Lam et al, 2010).…”

Section: Introductionmentioning

confidence: 99%

Best management practices to reduce nitrate pollution in a rural watershed in Germany

Pott¹,

Fohrer²

2017

Rev. ambiente água

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Water pollution by nitrogen originates at diffuse and point sources. In surface aquatic systems, nitrate is one of the most problematic forms of nitrogen, causing phytoplankton and macrophyte growth and consequently water eutrophication. This study evaluated whether the Soil and Water Assessment Tool (SWAT) model can simulate nitrate load in a rural watershed in daily and monthly time increments. The study investigated 462 km² of the upper part of the Stör catchment, a typical rural lowland catchment located in Northern Germany. The results showed that simulations of nitrate load at monthly increments are better predictors of observed data than daily simulations. The most effective practices to minimize the NO3-N load were the reduction of nitrogen fertilizer application and the increasing of conservation areas, such as field filter strips.Keywords: land use, nitrogen pollution, non-point pollution, SWAT model. Melhores práticas de manejo para reduzir a poluição por nitrato em uma bacia hidrográfica rural na Alemanha RESUMOA poluição da água causada por nitrogênio é originada por fontes difusas e pontuais. Em sistemas aquáticos superficiais, o nitrato é uma das formas mais problemáticas de nitrogênio, causando crescimento de fitoplâncton e de macrófitas e consequentemente a eutrofização da água. Este estudo teve o objetivo de avaliar se o modelo Soil and Water Assessment Tool (SWAT) pode simular a carga de nitrato em uma bacia hidrográfica rural em séries diárias e mensais. Foram investigados 462 km² da parte superior da bacia hidrográfica do rio Stör, uma bacia de planície tipicamente rural localizada no norte da Alemanha. Os resultados mostraram que as simulações de carga de nitratos em incrementos mensais são melhores preditores de dados observados do que simulações diárias. As práticas mais efetivas para minimizar as cargas de NO3-N foram a redução da aplicação de fertilizante nitrogenado e o incremento de áreas de conservação, tal como as faixas filtro.Palavras-chave: nitrogênio, polluição difusa, modelo SWAT, uso da terra. 889Best management practices to reduce nitrate pollution ...Rev. Ambient. Água vol. 12 n. 6 Taubaté -Nov. / Dec. 2017

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Contribution of point sources and diffuse sources to nitrogen and phosphorus loads in lowland river tributaries

Cited by 148 publications

References 43 publications

Water Quality of Drainage Canals and Assessment of Nutrient Loads Using QUAL2Kw

Water Quality of Drainage Canals and Assessment of Nutrient Loads Using QUAL2Kw

O desafio do manejo do nitrogênio no contexto da produtividade agricola e da vulnerabilidade ambiental

Best management practices to reduce nitrate pollution in a rural watershed in Germany

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