Nutrient budgets (N and P) for the Nui Coc reservoir catchment (North Vietnam)

Le, Thi Phuong Quynh; Ho, Cuong Tu; Duong, Thi Thuy; Rochelle-Newall, Emma; Dang, Dinh Kim; HOANG, THANH SON

doi:10.1016/j.agwat.2014.04.014

Cited by 18 publications

(5 citation statements)

References 28 publications

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“…San lấp mặt bằng ven bờ hay sử dụng vùng triều nuôi trồng thuỷ sản và khai hoang nông nghiệp đã làm giảm khả năng tự làm sạch của Vịnh Hạ Long (Nguyễn Đức Cự,1998 [12]. Khoảng 66% tổng nitơ hàng năm và 79% tổng lượng phốt pho hàng năm loại bỏ trong bể chứa hồ (T. P.Le, Rochelle Newall, 2014) [13]. Khả…”

Section: Mở đầUunclassified

Self-Cleaning Ability of Pollutants Containing Nitrogen and Phosphorus Transformed into NH4+, NO2-, NO3-, PO43-, of SonLa Hydropower Reservoir

Duc¹,

Hai²,

Tuan³

2020

EES

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The waste source containing nitrogen (N) and organic phosphorus (P) into the hydropower reservoir will be transformed into pollutants NH4+, NO2-, NO3-, PO43-. Son La hydropower reservoir has an area of 225 km2 of water surface and 10,850 km2 of water supply basin for electricity generation, Son La hydroelectricity plant and dam, which is particularly important in terms of socio-economic and national conditions, room, security. Using the method of calculating emissions with appropriate coefficients, 10.323 tons of nitrogen / year and 5.454 tons of phosphorus / year were added to the lake in 2019 through the data of population, livestock, fish cages, farming. Semi-submerged agriculture, depositing air into the lake. Applying the method of calculating the self-cleaning capacity of hydropower reservoirs through the results of determining the total main pollutants in the catchment tons N/P, the concentration of main pollutants in the water input and out of the lake, the concentration catchment pollutant (mg/L), basin pollutant input (tons / day), hydraulic retention time. Thereby, the Son La hydropower reservoir self-cleaning 8,117 tons / year with pollutants of groups NH4+, NO2-, NO3-, PO43-, specifically a volume of 2,756 million m3 and 16 days to save water. 1,224 tons were cleaned, a capacity of 6,504 million m3 with 37 days to save water, the lake cleaned 2,856 tons, a capacity of 9,266 million m3, and a retention time was 52 days, the lake cleaned 4,037 tons.

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Section: Mở đầUunclassified

Self-Cleaning Ability of Pollutants Containing Nitrogen and Phosphorus Transformed into NH4+, NO2-, NO3-, PO43-, of SonLa Hydropower Reservoir

Duc¹,

Hai²,

Tuan³

2020

EES

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“…Accordingly, controlling phosphorus inputs is essential to reducing eutrophication and managing ecological quality. Numerous studies have dealt with the budgets of N and/or P in reservoirs and lakes (Boggess et al 1995;Hiscock et al 2003;Le et al 2014;Redshaw et al 1988). Riverine transport is regarded as the principal pathway of pollutants into a reservoir.…”

Section: Introductionmentioning

confidence: 99%

Ten-year change of total phosphorous pollution in the Min River, an upstream tributary of the Three Gorges Reservoir

et al. 2016

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Understanding the spatial and temporal variation of nutrient concentrations, loads and their distribution from upstream tributaries is important for management of large lakes and reservoirs. The Min River is an important tributary of the upper reaches of the Three Gorges Reservoir (TGR) that contributes about 20 % of the inflow water from the Yangtze River to the TGR. It is also one of the main phosphorous sources of the TGR. In this study, total phosphorous (TP) concentrations and hydrological data from 2004 through 2014 for 13 sites in Min River and its tributaries were analyzed. The result suggested that the concentration of TP was comparatively lower in the upstream of the Min River and Dadu River, but tended to increase in recent years. Additionally, the TP pollution status in the Min River basin has gradually evolved from local pollution to whole-basin pollution. The concentration of TP in the Min River main stream increased, decreased and then increased again along the waterway. Pollution from nonpoint sources was the main contribution in the upstream portion and Outer River basin of Min River. Pollution from point sources was more serious than that from nonpoint sources in Chengdu, Meishan and Leshan segment. Specifically, TP pollution in Min River of Chengdu segment (Huanglongxi, Inner River) was primarily affected by urbanization, while Leshan segment (Yuebo) was mainly affected by glyphosate production. Controlling pollution from nonpoint sources and improving the sewage collection rate to reduce TP loads will be the primary task in the upstream portion and Outer River basin. Point source pollution controlling will still be the primary task associated with water quality management in the Inner River (Chengdu segment) and the downstream (Leshan segment) basin of Min River for the foreseeable future. Pollution from both point sources and nonpoint sources should be cared in the other area of Min River basin.

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“…The nutrient sources and pathways are numerous and difficult to determine when attempting to establish global budgets. Several studies in Vietnam have examined nutrient budgets in reservoir catchments (Le et al, 2014) or large catchments and deltas such as the Red River basin (Le et al, 2005;Luu et al, 2012). However, to date, nutrient budgets including emissions in urban areas are often incomplete and therefore do not satisfy recommendation for nutrients management.…”

Section: Introductionmentioning

confidence: 99%

Nutrient budgets in the Saigon–Dongnai River basin: Past to future inputs from the developing Ho Chi Minh megacity (Vietnam)

Nguyen

Némery

Gratiot

et al. 2020

River Research & Apps

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Ho Chi Minh City (HCMC, Vietnam) is one of the fastest growing megacities in the world. In this paper, we attempt to analyse the dynamics of nutrients, suspended sediments, and water discharges in its aquatic systems today and in the future. The work is based on nine sampling sites along the Saigon River and one on the Dongnai River to identify the reference water status upstream from the urban area and the increase in fluxes that occur within the city and its surroundings. For the first time, the calculated fluxes allow drawing up sediment and nutrient budgets at the basin scale and the quantification of total nutrient loading to the estuarine and coastal zones (2012-2016 period). Based on both national Vietnamese and supplementary monitoring programs, we estimated the water, total suspended sediment, and nutrients (Total N, Total P, and dissolved silica: DSi) fluxes at 137 m 3 year −1 , tonSS year −1 , 5,323 tonN year −1 , 450 tonP year −1 , and m 3 year −1 for the Saigon River and 1,693 year −1 , 3,292 2,734 1,175 × 10 3 tonSi × 10 3 tonSS year −1 , 31,030 tonN year −1 , 1,653 tonP year −1 , and 31,138 tonSi year −1 for the Dongnai River, respectively. Nutrient fluxes provide an indicator of coastal eutrophication potential (indicator of coastal eutrophication potential), using nutrient stoichiometry ratios. Despite an excess of nitrogen and phosphorus over silica, estuarine waters downstream of the megacity are not heavily impacted by HCMC. Finally, we analysed scenarios of future trends (2025-2050) for the nutrient inputs on the basis of expected population growth in H C M C and improvement of wastewater treatment capacity. We observed that without the construction of a large number of additional wastewater treatment plants, the eutrophication problem is likely to worsen. The results are discussed in the context of the wastewater management policy.

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Nutrient budgets (N and P) for the Nui Coc reservoir catchment (North Vietnam)

Cited by 18 publications

References 28 publications

Self-Cleaning Ability of Pollutants Containing Nitrogen and Phosphorus Transformed into NH4+, NO2-, NO3-, PO43-, of SonLa Hydropower Reservoir

Self-Cleaning Ability of Pollutants Containing Nitrogen and Phosphorus Transformed into NH4+, NO2-, NO3-, PO43-, of SonLa Hydropower Reservoir

Ten-year change of total phosphorous pollution in the Min River, an upstream tributary of the Three Gorges Reservoir

Nutrient budgets in the Saigon–Dongnai River basin: Past to future inputs from the developing Ho Chi Minh megacity (Vietnam)

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