Impact of sulfate and chloride on sediment phosphorus release in the Yangtze Estuary Reservoir, China

2013 ◽  
Vol 67 (8) ◽  
pp. 1748-1756 ◽  
Author(s):  
Xiaodan Jin ◽  
Yiliang He ◽  
Bo Zhang ◽  
Younas Hassan ◽  
Kirumba George
Keyword(s):  
Drinking Water ◽  
Yangtze River ◽  
River Estuary ◽  
Water Reservoir ◽  
Phosphorus Release ◽  
Yangtze River Estuary ◽  
Drinking Water Reservoir ◽  
P Release ◽  
Chloride Treatment ◽  
The Impact

The impact of sulfate (SO42−) and chloride (Cl−) on phosphorus (P) release from sediment in the drinking water reservoir of Yangtze River Estuary was studied systematically. A significant correlation between sodium (Na+), Cl−, SO42− and total P was found, suggesting that P was directly or indirectly associated with these ions. SO42− and Cl− were important factors that had an impact on P release from the sediment. The results showed that both sulfate and chloride enhanced phosphorus release from sediment. In the sulfate treatment, the decrease of organic phosphorus (OP) suggested that the mineralization of OP enhanced P release from sediment. Phosphonate was the main factor affecting the P release under sulfate condition. In chloride treatment, the sediment composition of iron (Fe), aluminum (Al), calcium (Ca) and magnesium (Mg) increased. The P fractions of Fe/Al-P, Ca-P and OP in sediment also increased. However, the increase of P was unstable after chloride treatment and was easy to release under disturbance. In this study, it was observed that sulfate and chloride could increase the risk of eutrophication in the Yangtze River Estuary drinking water reservoir.

scholarly journals Characteristics of antibiotics and antibiotic resistance genes in Qingcaosha Reservoir in Yangtze River Delta, China

2020 ◽  
Author(s):  
Ting Xu ◽  
Wanting Zhao ◽  
Xueping Guo ◽  
Hongchang Zhang ◽  
Shuangqing Hu ◽  
...  
Keyword(s):  
Drinking Water ◽  
Antibiotic Resistance ◽  
Resistance Genes ◽  
Yangtze River ◽  
Water Reservoir ◽  
Antibiotic Resistance Genes ◽  
Yangtze River Delta ◽  
River Delta ◽  
Penicillin G ◽  
Drinking Water Reservoir

Abstract Background Aquatic ecosystems are considered to be among the most important reservoirs of antibiotic resistance genes (ARGs). Drinking water sources were usually parts of lakes and rivers in Yangtze River Delta, among which Qingcaosha Reservoir is the largest river impoundment and benefit the population of more than 13 million for Shanghai city. In this study, we aimed at investigating the distribution of antibiotics and ARGs to characterize the pollution across various sites in Qingcaosha Reservoir in three seasons. Results Sulfamethoxazole, sulfamonomethoxine and penicillin G potassium salt were the dominant antibiotics and of high detection frequencies in this reservoir. Sulfonamide resistance genes ( sul1 and sul2 ) were the most prevalent and predominant genes. Higher total relative abundance of the ARGs were detected in the site closest to the inflow than those in other sites. Overall, the concentrations of antibiotics in May (spring) were relatively lower than November (autumn) and February (winter). Correlation analysis indicated sul1 , ermB and mphA had positive correlation with corresponding antibiotics in February and intI1 was also greatly positively correlated to sul1 , sul2 , ermB and mphA . Conclusion In conclusion, the antibiotics and ARGs were widespread in Qingcaosha Reservoir. Our result indicated that the drinking water reservoir might serve as gene reservoir for antibiotic resistance and mobile gene element intI1 can serve as a medium to contribute to the widespread of various ARGs. What is more, we considered that Reservoir could be served as a functional area contributing to the elimination of ARGs.

Application of Online Spill Simulation and Response Management System in the Yangtze River Estuary

2014 ◽  
Vol 2014 (1) ◽  
pp. 300316
Author(s):  
Haiwei Shen ◽  
Xiongping Zhang ◽  
Hong Shen ◽  
Yizhong Chen ◽  
Yiping Shao ◽  
...  
Keyword(s):  
Drinking Water ◽  
Management System ◽  
Yangtze River ◽  
River Estuary ◽  
Yangtze River Estuary ◽  
The Yangtze River ◽  
Online System ◽  
The Yangtze River Estuary ◽  
The World ◽  
Response Team

Yangtze River estuary is one of the busiest shipping corridors in the world connecting China to the world and coast to inner China. In the middle of the Yangtze River estuary, there is a Qing Cao Sha reservoir providing drinking water to more than 10 million people in Shanghai. Frequent spills near the estuary possess a great threat to drinking water safety to the megacity. Scientists in RPS ASA and SAES have built an online spill simulation and response management system for the Yangtze River Estuary. The online system integrates oil/chemical spill models, operational hydrodynamic model, online met-ocean data, response and resource database with an interactive mapping system. It has been successfully used to simulate the spill trajectory and fate of the spill to coordinate with spill response team. Here we introduce this online system and present an oil spill response case in the Yangtze Estuary in June 2012 where the model simulation results matched extremely well with the field data observed by the local response team.

Modeling the impact of body-contact recreation on pathogen concentrations in a source drinking water reservoir

1998 ◽  
Vol 32 (11) ◽  
pp. 3293-3306 ◽  
Author(s):  
Michael A. Anderson ◽  
Mic H. Stewart ◽  
Marylynn V. Yates ◽  
Charles P. Gerba
Keyword(s):  
Drinking Water ◽  
Water Reservoir ◽  
Body Contact ◽  
Drinking Water Reservoir ◽  
The Impact ◽  
Contact Recreation

scholarly journals Analysis of Nonstationary Change of Annual Maximum Level Records in the Yangtze River Estuary

2016 ◽  
Vol 2016 ◽  
pp. 1-14 ◽  
Author(s):  
Guofang Li ◽  
Xinyi Xiang ◽  
Caixiu Guo
Keyword(s):  
Change Point ◽  
Yangtze River ◽  
River Estuary ◽  
Kendall Test ◽  
Test Methods ◽  
Yangtze River Estuary ◽  
Annual Maximum ◽  
Tidal Level ◽  
The Yangtze River Estuary ◽  
The Impact

Under the impact of climate change and human activities, the stationarity of hydrometeorological extreme value series has been losing in many regions, which makes occurrence rules of hydrometeorological extreme events more complicated. In this study, the efficiencies of trend test methods such as Spearman rank correlation test and Mann-Kendall test, as well as the efficiencies of change-point test methods such as moving T test, moving rank sum test, Pettitt test, and sequential Mann-Kendall test were analyzed quantitatively through Monte Carlo simulation. Five representative level stations in the Yangtze River estuary were selected, and the methods listed above were used in the trend and change-point detection of the annual maximum tidal level records in the period of 1950–2008. It was found that obvious rising tendency existed in the annual maximum tidal level series for all these 5 stations, and year 1980 (for 3 stations) and year 1979 (for 2 stations) were statistically significant change-points. Two subseries were divided with the change-point as the dividing point for all these actual series in the stations. Frequency analyses were carried out, respectively, for all of the subseries, and the impact of nonstationary changes in annual maximum tidal levels on probability distribution was evaluated quantitatively.

scholarly journals Characteristics of antibiotics and antibiotic resistance genes in Qingcaosha Reservoir in Yangtze River Delta, China

2020 ◽  
Author(s):  
Ting Xu ◽  
Wanting Zhao ◽  
Xueping Guo ◽  
Shuangqing Hu ◽  
Hongchang Zhang ◽  
...  
Keyword(s):  
Drinking Water ◽  
Antibiotic Resistance ◽  
Resistance Genes ◽  
Yangtze River ◽  
Water Reservoir ◽  
Antibiotic Resistance Genes ◽  
Yangtze River Delta ◽  
River Delta ◽  
Penicillin G ◽  
Drinking Water Reservoir

Abstract Background Aquatic ecosystems are considered to be among the most important reservoirs of antibiotic resistance genes (ARGs). Drinking water sources were usually parts of lakes and rivers in Yangtze River Delta, among which Qingcaosha Reservoir is the largest river impoundment and benefit the population of more than 13 million for Shanghai city. In this study, we aimed at investigating the distribution of antibiotics and ARGs to characterize the pollution across various sites in Qingcaosha Reservoir in three seasons.Results Sulfamethoxazole, sulfamonomethoxine and penicillin G potassium salt were the dominant antibiotics and of high detection frequencies in this reservoir. Sulfonamide resistance genes ( sul1 and sul2 ) were the most prevalent and predominant genes. Higher total relative abundance of the ARGs were detected in the site closest to the inflow than those in other sites. Overall, the concentrations of antibiotics in May (spring) were relatively lower than November (autumn) and February (winter). Correlation analysis indicated sul1 , ermB and mphA had positive correlation with corresponding antibiotics in February and intI1 was also greatly positively correlated to sul1 , sul2 , ermB and mphA .Conclusion In conclusion, the antibiotics and ARGs were widespread in Qingcaosha Reservoir. Our result indicated that the drinking water reservoir might serve as gene reservoir for antibiotic resistance and mobile gene element intI1 can serve as a medium to contribute to the widespread of various ARGs. What is more, we considered that Reservoir could be served as a functional area contributing to the elimination of ARGs.

Pollution by phosphorus and nitrogen in water streams feeding the Zelivka drinking water reservoir

1999 ◽  
Vol 39 (12) ◽  
pp. 207-214 ◽  
Author(s):  
Jiri Holas ◽  
Marketa Holas ◽  
Vladimir Chour
Keyword(s):  
Water Quality ◽  
Drinking Water ◽  
Bottom Sediments ◽  
Arable Land ◽  
Treatment Plant ◽  
Water Reservoir ◽  
Phosphorus Release ◽  
Phosphorus Compounds ◽  
Reservoir Water ◽  
Drinking Water Reservoir

This case study refers to long term monitoring of Martinicky and Sedlický Brooks, which represent general water-quality characteristics well related to the watershed of the whole Zelivka drinking water reservoir. For a period of more than ten years water-quality indices were systematically monitored at each profile together with actual discharges recorded at selected profiles. It is seen that the only critical pollutants are nutrients, namely nitrate nitrogen and total phosphorus, originating from both urban and agricultural sources, while industrial pollution is relatively marginal in the watershed. Phosphorus concentrations do not display any simple time regularity. Persistent all-year background phosphorus load gives evidence of the urban origin of pollution. Total input of phosphorus into the reservoir came mainly from surface inflows, out of rainfall and out of bottom sediments. Phosphorus was found to be the limiting nutrient for phytoplankton growth and was therefore recognised as the principal element responsible for reservoir eutrophication rates, which could probably be effectively controlled by concerted abatement actions. Most of the watershed born nitrogen pollution has a distinctly non-point (diffuse) character. Typical yearly pattern of nitrate concentrations means distinct and regular increase during end-of-winter and spring period due to processes of mineralization, typical for productive arable land on soils with good drainage properties. The process of state economy transition, which was initiated in 1989, has led to dramatic decrease of fertiliser inputs per hectare of land. Reduced fertilisation of arable land has not yet been reflected in improved quality of surface waters. The proposed strategy for prevention and abatement in the Zelivka reservoir eutrophication should be based on win-win principles applied throughout the entire watershed and, at present, preferentially focused on:phosphorus cycle control and improvement within both the watershed and reservoir water (diminished use of chemicals producing reactive phosphorus compounds, improved phosphorus removal from urban waste water, to prevent phosphorus release from bottom sediments)general soil erosion control and prevention - grassland cultivation on vulnerable areas and buffer zones and subsidy for cultivating plants on arable land even between growing periodsproper maintenance and improvement of treatment plant technology to maintain actual standards of produced drinking water.

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