Tracing the sources of nitrate in the Han River watershed in Korea, using δ15N-NO3− and δ18O-NO3− values

Lee, Kwang-Sik; Bong, Yeon-Sik; Lee, Dong‐Ho; Kim, Yongcheol; Kim, Kangjoo

doi:10.1016/j.scitotenv.2008.01.058

Cited by 114 publications

(48 citation statements)

References 32 publications

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“…Dry farmland and paddy land are mainly centralized in the middle and lower reaches of the river and their covers are N40% in farmland and farmland-residence zones. Additionally, the (Mayer et al, 2002;Kendall et al, 2007;Lee et al, 2008;Xue et al, 2009) in the Haicheng River basin, Northeast China (A, B, C, and D represent nitrogen sources from synthetic fertilizer, domestic sewage/manure, soil organic matter, and atmospheric deposition, respectively; z1-z6 denote forest-farmland, managed forest, farmland-livestock rearing, farmland, residence, and farmland-residence zones, respectively). proportions of dry farmland and paddy land reach maxima of 52.7% and 16.3% in the farmland-residence zone.…”

Section: Land-use Patterns In Different Zonesmentioning

confidence: 99%

“…The isotopic compositions of atmospheric nitrogen deposition range from −13‰ to +13‰ for δ 15 N-NO 3 (Lee et al, 2008;Xue et al, 2009) and from 25‰ to 70‰ for δ 18 O-NO 3 (Kendall et al, 2007). Nitrate originating from manure or sewage is usually characterized by δ 15 N-NO 3 values between +7‰ and +20‰ or more (Mayer et al, 2002) and δ…”

Section: Introductionmentioning

confidence: 99%

“…O-NO 3 values between 0‰ to 15‰ (Kendall et al, 2007), which is isotopically distinct from nitrate in synthetic fertilizers (− 3‰ to + 3‰ δ 15 N-NO 3 and 17‰ to 25‰ δ 18 O-NO 3 ) and natural soil organic matter (− 3‰ to +5‰ δ 15 N-NO 3 and − 15‰ to 15‰ δ 18 O-NO 3 ) (Kendall et al, 2007;Lee et al, 2008). The possible sources of nitrogen in rivers thus include synthetic fertilizer, domestic sewage/manure, soil organic matter, and atmospheric deposition.…”

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Effects of land-use patterns on in-stream nitrogen in a highly-polluted river basin in Northeast China

Zhang

Meng

et al. 2016

Science of The Total Environment

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• Land-use types were correlated well with most nitrogen variables over seasons.• Built-up land dominated in predicting nitrogen variables during different seasons.• Shape metrics predicted most nitrogen variables in different seasons.• Nitrogen sources and their contributions were estimated using nitrate isotopes.• Domestic sewage mainly contributed to river nitrogen pollution in residence zone. This study investigated the effects of land-use patterns on nitrogen pollution in the Haicheng River basin in Northeast China during 2010 by conducting statistical and spatial analyses and by analyzing the isotopic composition of nitrate. Correlation and stepwise regressions indicated that land-use types and landscape metrics were correlated well with most river nitrogen variables and significantly predicted them during different sampling seasons. Built-up land use and shape metrics dominated in predicting nitrogen variables over seasons. According to the isotopic compositions of river nitrate in different zones, the nitrogen sources of the river principally originated from synthetic fertilizer, domestic sewage/manure, soil organic matter, and atmospheric deposition. Isotope mixing models indicated that source contributions of river nitrogen significantly varied from forested headwaters to densely populated towns of the river basin. Domestic sewage/manure was a major contributor to river nitrogen with the proportions of 76.4 ± 6.0% and 62.8 ± 2.1% in residence and farmland-residence zones, respectively. This research suggested that regulating built-up land uses and reducing discharges of domestic sewage and industrial wastewater would be effective methods for river nitrogen control. G R A P H I C

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Section: Land-use Patterns In Different Zonesmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

mentioning

confidence: 99%

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Effects of land-use patterns on in-stream nitrogen in a highly-polluted river basin in Northeast China

Zhang

Meng

et al. 2016

Science of The Total Environment

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“…-ratio, combined with the isotopic method, has proved to be a useful hydro-chemical indicator to detect sources of NO -3 -N in different ecosystems [44][45][46]. Values of the NO -…”

Section: -N=c1mentioning

confidence: 99%

Nitrogen pollution and source identification of urban ecosystem surface water in Beijing

Ren

Zhang

et al. 2013

Front. Environ. Sci. Eng.

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Nitrogen contamination of surface water is a worldwide environmental problem with intensive agriculture and high population densities. We assessed the spatial and seasonal variation in concentrations of total nitrogen and different nitrogen species present in surface-water in Beijing, China. Also, chemical (NO , and total nitrogen from 2.4 to 17.0 mg$L -1 . Inorganic nitrogen accounted for between 60 and 100% of total nitrogen at the ten monitoring sites. Nitrate nitrogen, ammonium nitrogen, and total nitrogen concentrations at the 2 downstream monitoring sites in south-eastern Beijing were significantly higher than those at the other eight upstream monitoring sites (P < 0.01). Examination of seasonal variation showed that there was a significant inverse relationship between nitrate nitrogen concentrations and precipitation, and that nitrate nitrogen concentrations peaked in the dry seasons. The information given by the δ 15 N nitrate values and nitrate nitrogen concentrations, combined with the NO - -N=C1ratio distribution, showed that domestic sewage was the major source of nitrate in Beijing. Methods to control and reduce sewage pollution are urgently needed to help manage surface water quality in Beijing.

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“…Recent studies have suggested the employment of oxygen isotopic composition as an additional marker of nitrate sources due to the large variations of δ 18 O ranges among different sources [10,11]. The dual isotopic approach has been used to investigate the nitrate sources of Mississippi River and the Illinois River in the U.S. [12,13], as well as the Yangtze River in China and the Han River in Korea [14,15]. These studies have reported a high level of sensitivity and reliability of using dual isotopic technique for tracking nitrate sources.…”

Section: Introductionmentioning

confidence: 99%

Tracing the Nitrate Sources of the Yili River in the Taihu Lake Watershed: A Dual Isotope Approach

Zeng

2014

Water

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Abstract:As the third largest freshwater lake in China, Taihu Lake has experienced severe cyanobacterial blooms and associated water quality degradation in recent decades, threatening the human health and sustainable development of cities in the watershed. The Yili River is a main river of Taihu Lake, contributing about 30% of the total nitrogen load entering the lake. Tracing the nitrate sources of Yili River can inform the origin of eutrophication in Taihu Lake and provide hints for effective control measures. This paper explored the nitrate sources and cycling of the Yili River based on dual nitrogen (δ

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Tracing the sources of nitrate in the Han River watershed in Korea, using δ15N-NO3− and δ18O-NO3− values

Cited by 114 publications

References 32 publications

Effects of land-use patterns on in-stream nitrogen in a highly-polluted river basin in Northeast China

Effects of land-use patterns on in-stream nitrogen in a highly-polluted river basin in Northeast China

Nitrogen pollution and source identification of urban ecosystem surface water in Beijing

Tracing the Nitrate Sources of the Yili River in the Taihu Lake Watershed: A Dual Isotope Approach

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