Nitrogen flow assessment in rapidly urbanizing Hai Duong province, downstream of Cau River Basin, Vietnam

Ta, Thao Thi; Trinh, Anh Duc; Nga, Thu

doi:10.1007/s10163-017-0616-2

Cited by 10 publications

(3 citation statements)

References 10 publications

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“…2b also presented sharply high concentrations of NO2at sites 4 and 5 in 2013 and sites 6 and 9 in 2011. Compared to the previous studies and other rivers, the NO2concentrations were similar with the data ten years ago (Duong et al, 2007) and were lower than that of Luoc River, Vietnam (Ta et al, 2018). This study found that 33% of NO2samples exceeded the drinking water and irrigation guidelines (MONRE, 2015).…”

Section: Nutrients Concentrationssupporting

confidence: 82%

Chemical and microbiological risk assessment of urban river water quality in Vietnam

Nguyen

Truong³

et al. 2019

Environ Geochem Health

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The concentrations of nutrients (NH4 + , NO2-, NO3and PO4 3-), COD, BOD5, coliform, turbidity and eight metals (As, Cd, Ni, Hg, Cu, Pb, Zn and Cr) were investigated in surface water of the Nhue River and To Lich River, Vietnam for 7 years (2010-2017, except 2014). The results from 505 samples demonstrated that concentrations of all these contaminants showed significant spatial and temporal variations. The Nhue River water was seriously polluted by NH4 + (0.025-11.28 mg/L), PO4 3-(0.17-1.72 mg/L), BOD5 (5.8-179.6 mg/L), COD (1.4-239.8 mg/L) and coliform (1540-326470 CFU/100L); moderately polluted by As (0.2-131.15 μg/L) and Hg (0.11-4.1 μg/L); and slightly polluted by NO2-(0.003-0.33 mg/L) and Cd (2.1-18.2 μg/L). The concentrations of NH4 + , PO4 3-, COD, BOD5 and coliform exceeded the drinking water guidelines at all sites and exceeded the irrigation water standards at some locations. Regarding heavy metals, only As, Cd and Hg contents were higher than the permissible limits at some locations while others were below the guideline values. Risks of metals on human health were evaluated by using hazard index (HI) and cancer risk through ingestion and dermal contacts for adults and children. It indicated that As was the most important pollutant leading to non-carcinogenic and carcinogenic concerns. The noncarcinogenic risks of As (HI 1.83-7.4 for adults and 2.6-10.5 for children) were higher than the acceptable values of 1.0 at all sites for both adults and children, while As posed significant carcinogenic risks for adults (1x10-4-4.96x10-4) but not for children (0.27x10-4-1.6x10-4). The study indicated that metals posed hazards mainly by oral intake in drinking water pathway.

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Section: Nutrients Concentrationssupporting

confidence: 82%

Chemical and microbiological risk assessment of urban river water quality in Vietnam

Nguyen

Truong³

et al. 2019

Environ Geochem Health

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“…Using MFA could help provide comprehensive information about sources, flows, and sinks of N (Brunner and Rechberger, 2004). Several studies agreed that MFA is a powerful tool for nutrient management in the watershed (Schaffner et al, 2011;Kupkanchanakul et al, 2015;Alvarez et al, 2018;Ta et al, 2018). MFA results can be used to support environmental protection (Wang et al, 2015), to recognize environmental problems early (Elshkaki and Graedel, 2013), and to establish priority for environmental measures (Kwonpongsagoon et al, 2007;Schaffner et al, 2009;Wongsoonthornchai et al, 2016).…”

Section: Introductionmentioning

confidence: 99%

Estimation of Nitrogen Loading to Surface Water from Agriculture Based Area and Its Application for Water Pollution Mitigation

Thitanuwat

Wongsoonthornchai

2021

Environ. Nat. Resour. J.

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Eutrophication of surface water is a globally widespread environmental problem. Similarly, in Thailand, the Nakhon Nayok River (NNR), located in an agriculture-based area, has been markedly affected by eutrophication problems. However, there are limited studies on significant nitrogen (N) sources during agricultural activities in the area. Therefore, this study examined the major sources and key flows of N loading to the surface water by applying material flow analysis (MFA) to the relevant seven subsystems in 2018. The results showed that aquaculture and rice cultivation were the main sources of nitrogen inputs and outputs. Both considerably contributed to the nitrogen loading to the surface water, yet nitrogen released from the aquaculture was five times higher than the rice cultivation. The nitrogen flux found in the study area was 0.11 kg/ha. Accordingly, creating wetlands for aquaculture wastewater treatment that could potentially remove nitrogen by 12% was recommended.

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“…Water quality degradation due to the increase in nutrient loading from agricultural fields are still common in many parts of the world [1,2]. The elevated nutrient concentrations, especially in the form of phosphates, nitrate, and ammonium, caused by discharge from domestic, industry, agriculture, and aquaculture, as well as atmospheric deposition, lead to eutrophication.…”

Section: Introductionmentioning

confidence: 99%

Seasonal Variation and Retention of Ammonium in Small Agricultural Streams in Central Thailand

Kasahara

Vudhivanich

2018

Environments

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Elevated nutrient concentrations are of concern in many agricultural streams. This study observed seasonal variation of inorganic nitrogen concentrations in small drainage streams that receive discharge predominantly from three different types of agricultural practices, swine farms, aquaculture, and paddy fields, in the Tha Chin River Basin in central Thailand. The drainage streams had high inorganic nitrogen concentrations, low dissolved oxygen concentrations (<3 mg L −1), and ammonium was the dominant form of inorganic nitrogen. The highest ammonium concentrations were observed in the drainage streams through swine farm areas, exceeding 4 mg L −1 throughout the year. In-stream ammonium retention was examined using pulse co-injections of ammonium and chloride in a drainage stream, and the effects of in-channel vegetation on ammonium retention were evaluated. This study showed that a considerable amount of ammonium was retained with the presence of in-channel vegetation. After vegetation removal, both the hydraulic and ammonium uptake length increased by >50 m, and the ammonium retention declined by approximately 50%. These results suggest that small agricultural streams experience a high concentration of inorganic nitrogen, similar or even more than larger streams, and that in-channel vegetation plays important role in nitrogen retention. The management of in-channel vegetation will have considerable effects on nitrogen transport.

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Nitrogen flow assessment in rapidly urbanizing Hai Duong province, downstream of Cau River Basin, Vietnam

Cited by 10 publications

References 10 publications

Chemical and microbiological risk assessment of urban river water quality in Vietnam

Chemical and microbiological risk assessment of urban river water quality in Vietnam

Estimation of Nitrogen Loading to Surface Water from Agriculture Based Area and Its Application for Water Pollution Mitigation

Seasonal Variation and Retention of Ammonium in Small Agricultural Streams in Central Thailand

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