Sources and transformations of anthropogenic nitrogen in the highly disturbed Huai River Basin, Eastern China

Ma, Ping; Liu, Shuaixia; Yu, Qibiao; Li, Xinyan; Han, Xinqing

doi:10.1007/s11356-019-04470-1

Cited by 40 publications

(14 citation statements)

References 97 publications

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“…Com relação ao monitoramento de interferentes MON via quantificação de nitrato (NO3 -), os índices remetem ao processo de nitrificação em meio aquoso que ocorre mediante ação de bactérias aeróbias (ZHENG et al, 2018). Como a formação de NO3corresponde ao último estágio da oxidação do nitrogênio e resulta da ação de nitrobactérias quimiossintetizantes o monitoramento sequencial de espécies nitrogenadas como nitrito (NO2 -) e nitrato (NO3 -) indicará se a matéria orgânica se encontra decomposta (MA et al, 2019;.…”

Section: Resultsunclassified

Problemática Da Ocorrência De Nitrato Nas Águas Do Aquífero Dunas-Barreiras Da Cidade De Natal/Rn

Reis¹,

Netto²,

Ramalho³

et al. 2022

Águas Potáveis: Padrões De Qualidade, Metodologias Experimentais E Técnicas De Purificação

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Águas potáveis: padrões de qualidade, metodologias experimentais e técnicas de purificação está licenciado sob CC BY 4.0.Esta licença exige que as reutilizações deem crédito ao criador. Ele permite que os reutilizadores distribuam, remixem, adaptem e construam o material em qualquer meio ou formato, mesmo para fins comerciais. O conteúdo da obra e seus dados em sua forma, correção e confiabilidade são de responsabilidade exclusiva dos autores, não representando a posição oficial da Editora Amplla. É permitido o download da obra e o compartilhamento desde que sejam atribuídos créditos aos autores. Todos os direitos para esta edição foram cedidos à Editora Amplla.

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Section: Resultsunclassified

Problemática Da Ocorrência De Nitrato Nas Águas Do Aquífero Dunas-Barreiras Da Cidade De Natal/Rn

Reis¹,

Netto²,

Ramalho³

et al. 2022

Águas Potáveis: Padrões De Qualidade, Metodologias Experimentais E Técnicas De Purificação

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“…This is similar to the result reported for a subbasin in the study area (0.95 kg•ha À1 •yr À1 for the baseflow NO 3 -N load (Chen et al 2017) and 40% for the BFNI (Chen 2013)). N fertilizers have been identified as the main source of NPS NO 3 -N pollution in this agricultural watershed (Chen 2013;Ma et al 2019). According to Ju et al (2010), soil residual N and nitrate leaching accounted for about 27 and 30% of the fertilizer N (approximately 600 kg•N•ha À1 •yr À1 ), respectively.…”

Section: Discussion Ps and Nps No 3 -N Load Patternsmentioning

confidence: 99%

Annual nitrate load patterns in an agricultural watershed in consecutive dry years

Chen

Ruan

2021

Hydrology Research

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Nitrate (NO3-N) load characteristics in consecutive dry years in the Huai River Basin (HRB), China, were examined using streamflow and NO3-N concentration data. The data set spanned 12 years including three consecutive dry years. Baseflow separation, load estimation, and nonparametric linear regression were applied to separate point source (PS), baseflow, and surface runoff NO3-N loads from the total load. The mean annual nonpoint source (NPS) load was 2.84 kg·ha−1·yr−1, accounting for 90.8% of the total load. Baseflow contributed approximately one-fourth of the natural runoff and half of the NPS load. The baseflow nitrate index (i.e., the ratio of baseflow NO3-N load to total NPS NO3-N load) was 25.4% higher in consecutive dry years than in individual dry years. This study demonstrated that baseflow is the preferential hydrological pathway for NO3-N transport in the HRB and that baseflow delivers a higher NO3-N percentage to streams under long-term drought than under short-term drought. This study highlights the alarming evidence that continuous drought caused by climate change may lead to a higher rate of nitrogen loss in agricultural watersheds.

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“…The single agricultural land contributed less to nitrate from soil nitrogen. Soil nitrogen accounted for only 25% of the four sources in a recent study on the Huaihe River (Ma et al, 2019).…”

Section: Comparison Of the Nitrate Source With Other Twenty-five Similar Watershedsmentioning

confidence: 94%

“…(Ⅱ) For continuous anthropogenic emissions, the amount of sewage discharged during the wet season was greater, which leaded to stronger correlations between indicators. Notably, Clis usually found in sewage, and high NO3-N concentration is usually accompanied by high Clconcentration (Yi et al, 2017;Ma et al, 2019). The high correlation between NO3-N and Clin the wet season also indicated that the amount of sewage discharged in the wet season was large.…”

Section: Spatiotemporal Variations Of Nitratementioning

confidence: 99%

“…Nitrate source is closely linked with human behaviors and the characteristics of watersheds (e.g., the climate and land-use type) (Hu et al, 2019;Ma et al, 2019). It is challenging to trace the source of nitrate in complex watersheds because, in such areas, the pollution sources show variability with the spatiotemporal variation (Yi et al, 2017;Hu et al, 2019;Li et al, 2019).…”

Section: Introductionmentioning

confidence: 99%

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Contribution of Nitrogen Sources to Streams in Mixed-use Watershed Varies Seasonally in a Temperate Region

Lin

Liu

Xiao

et al. 2021

Preprint

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The Beiyun river flows through a hot spot region of Beijing-Tianjin-Hebei in China that serves a majority of occupants. However, the region experiences severe nitrate pollution, posing a threat to human health due to inadequate self-purification capacity. In that context, there is an urgent need to assess nitrate levels in this region. Herein, we used δ15N-NO3, δ18O-NO3 isotopes analysis, and stable isotope analysis model to evaluate the nitrate source apportionment in the Beiyun river. A meta-analysis was then used to compare the potential similarity of nitrate sources among the Beiyun riverine watershed and other watersheds. Results of nitrate source apportionment revealed that nitrate originated from the manure & sewage (contribution rate: 89.6%), soil nitrogen (5.9%), and nitrogen fertilizer (3.9%) in the wet season. While in the dry season, nitrate mainly originated from manure & sewage (91.6%). Further, different land-use types exhibited distinct nitrate compositions. Nitrate in urban and suburban areas mostly was traced from manure & sewage (90.5% and 78.8%, respectively). Notably, the different nitrate contribution in the rural-urban fringe and plant-covered areas were manure & sewage (44.3% and 32.8%), soil nitrogen (26.9% and 35.7%), nitrogen fertilizer (23.5% and 29.4%), and atmospheric deposition (5.3% and 2.0%). Through a meta-analysis, we found nitrogen fertilizer, soil nitrogen, and manure & sewage as the main nitrate sources in the Beiyun riverine watershed or the other similar complex watersheds in the temperate. Thus, this study provides a scientific basis for nitrate source apportionment and nitrate preventive management in watersheds with complex land-use types in temperate regions.

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Sources and transformations of anthropogenic nitrogen in the highly disturbed Huai River Basin, Eastern China

Cited by 40 publications

References 97 publications

Problemática Da Ocorrência De Nitrato Nas Águas Do Aquífero Dunas-Barreiras Da Cidade De Natal/Rn

Problemática Da Ocorrência De Nitrato Nas Águas Do Aquífero Dunas-Barreiras Da Cidade De Natal/Rn

Annual nitrate load patterns in an agricultural watershed in consecutive dry years

Contribution of Nitrogen Sources to Streams in Mixed-use Watershed Varies Seasonally in a Temperate Region

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