scholarly journals Status of aquatic plants and its relationship with water environment factors in the lakes along the lower reaches of the Yangtze River

2015 ◽  
Vol 27 (3) ◽  
pp. 385-391 ◽  
Author(s):  
KONG Xianghong ◽  
◽  
XIAO Lanlan ◽  
SU Haojie ◽  
WU Yao ◽  
...  
Keyword(s):  
Aquatic Plants ◽  
Yangtze River ◽  
Water Environment ◽  
The Yangtze River ◽  
Environment Factors

scholarly journals The impact of withdrawing aquaculture facilities on metazooplankton communities in the lakes are connected to the Yangtze River, China

PLoS ONE ◽  
2021 ◽  
Vol 16 (5) ◽  
pp. e0252100
Author(s):  
Yixing Zhang ◽  
Yutao Wang ◽  
Zhongze Zhou
Keyword(s):  
Aquatic Plants ◽  
Yangtze River ◽  
Species Turnover ◽  
Water Environment ◽  
Scientific Basis ◽  
The Yangtze River ◽  
Β Diversity ◽  
Water Ecosystem ◽  
Aquaculture Facilities ◽  
The Impact

The withdrawal of aquaculture facilities has an important impact on the aquatic ecosystem of the lakes connected to the Yangtze River. In order to elucidate the response mechanism of metazooplankton to the changes in water environment after the removal of aquaculture facilities, we collected metazooplankton samples and investigated the water environment in the Huayanghe Lakes from the summer of 2018 to the spring of 2019. Aquatic plants recovered quickly, and water eutrophication was relieved, especially in Lake Huangda, followed by Lake Bo. During our study, the highest regional (γ) diversity was 71 in summer, while the lowest was 32 in winter. Species turnover in space (β diversity) varied between 10.01 and 56.52, which was highest in summer. Based on redundancy analysis, environmental factors such as transparency, Chl α, water temperature and water depth, had greatly effects on the metazooplankton community structure. The results showed that the restoration of aquatic plants increased species diversity and metazooplankton density. This study provides a data basis for lakes restoration and a scientific basis for the management and protection of lakes water ecosystem.

Research on the distribution of neonicotinoid and fipronil pollution in the Yangtze River by high-performance liquid chromatography

2020 ◽  
Vol 12 (46) ◽  
pp. 5581-5590
Author(s):  
Xin Pan ◽  
Zhangjun Wang ◽  
Chao Chen ◽  
Hui Li ◽  
Xianxin Li ◽  
...  
Keyword(s):  
High Performance Liquid Chromatography ◽  
Liquid Chromatography ◽  
Yangtze River ◽  
High Performance ◽  
Solid Phase ◽  
Water Environment ◽  
River Estuary ◽  
Yangtze River Estuary ◽  
The Yangtze River ◽  
The Yangtze River Estuary

Neonicotinoids and fipronil pesticides in the water environment of the Yangtze River Estuary was detected by SDB-RPS solid-phase extraction membranes and high-performance liquid chromatography-mass spectrometry..

scholarly journals Distribution characteristics, enrichment patterns and health risk assessment of dissolved trace elements in river water in the source region of the Yangtze River

2021 ◽  
Author(s):  
Min Liu ◽  
Liangyuan Zhao ◽  
Qingyun Li ◽  
Yuan Hu ◽  
Huawei Huang ◽  
...  
Keyword(s):  
Trace Elements ◽  
Yangtze River ◽  
Water Resource Management ◽  
Source Region ◽  
Regional Distribution ◽  
Water Environment ◽  
Average Concentration ◽  
Distribution Characteristics ◽  
The Yangtze River ◽  
Dissolved Trace Elements

Abstract The security of water environment in the source region of the Yangtze River (SRYR) is also vital to the water environment security of the whole basin. The results showed that the rivers in the SRYR were weakly alkaline and the values of total solid solubility (TDS), electrical conductivity (EC), turbidity concentration and salinity were higher than the values in the middle and lower reaches of the Yangtze River. The results showed that the dissolved trace elements detected displayed obvious regional distribution characteristics, showing a concentration trend of high in the Chumar River, low in the Dangqu, and middle in Tong River. All water quality indexes in the SRYR met the surface water environmental quality standard of class II based on GB 3838-2002 except Hg, while the average concentration of As exceeded 10 μg/L. The main enrichment elements in the SRYR were Li, Se, As and Pb, and their concentrations were far higher than the average concentration of the world rivers. Moreover, the HI and HQingrstion of children caused by As in the SRYR were greater than 1. This study could provide basic data for water environment protection and water resource management in the SRYR.

scholarly journals Canonical Correlation Study on the Relationship between Shipping Development and Water Environment of the Yangtze River

2020 ◽  
Vol 12 (8) ◽  
pp. 3279 ◽  
Author(s):  
Sisi Que ◽  
Hanyu Luo ◽  
Liang Wang ◽  
Wenqiang Zhou ◽  
Shaochun Yuan
Keyword(s):  
Canonical Correlation ◽  
Yangtze River ◽  
Nitrogen Concentration ◽  
Water Environment ◽  
Ammonia Nitrogen ◽  
Correlation Study ◽  
The Yangtze River ◽  
Petroleum Pollution ◽  
Freight Volume ◽  
The Relationship

The sustainable development of the Yangtze River will affect the lives of the people who live along it as well as the development of cities beside it. This study investigated the relationship between shipping development and the water environment of the Yangtze River. Canonical correlation analysis is a multivariate statistical method used to study the correlation between two groups of variables; this study employed it to analyze data relevant to shipping and the water environment of the Yangtze River from 2006 to 2016. Furthermore, the Yangtze River Shipping Prosperity Index and Yangtze River mainline freight volume were used to characterize the development of Yangtze River shipping. The water environment of the Yangtze River is characterized by wastewater discharge, ammonia nitrogen concentration, biochemical oxygen demand, the potassium permanganate index, and petroleum pollution. The results showed that a significant correlation exists between Yangtze River shipping and the river’s water environment. Furthermore, mainline freight volume has a significant impact on the quantity of wastewater discharged and petroleum pollution in the water environment.

scholarly journals Water Environmental Capacity Calculation Based on Control of Contamination Zone for Water Environment Functional Zones in Jiangsu Section of Yangtze River, China

Water ◽  
2021 ◽  
Vol 13 (5) ◽  
pp. 587
Author(s):  
Qiuxia Ma ◽  
Yong Pang ◽  
Ronghua Mu
Keyword(s):  
Water Quality ◽  
Yangtze River ◽  
Water Quality Management ◽  
Water Environment ◽  
Ammonia Nitrogen ◽  
The Yangtze River ◽  
Environmental Capacity ◽  
Water Environmental Capacity ◽  
Functional Zones ◽  
The Government

In recent years, due to unsustainable production methods and the demands of daily life, the water quality of the Yangtze River has deteriorated. In response to Yangtze River protection policy, and to protect and restore the ecological environment of the river, a two-dimensional model of the Jiangsu section was established to study the water environmental capacity (WEC) of 90 water environment functional zones. The WEC of the river in each city was calculated based on the results of the water environment functional zones. The results indicated that the total WECs of the study area for chemical oxygen demand (COD), ammonia nitrogen (NH3-N), and total phosphorus (TP) were 251,198 t/year, 24,751 t/year, and 3251 t/year, respectively. Among the eight cities studied, Nanjing accounted for the largest proportion (25%) of pollutants discharged into the Yangtze River; Suzhou (11%) and Zhenjiang (12%) followed, and Wuxi contributed the least (0.4%). The results may help the government to control the discharge of pollutants by enterprises and sewage treatment plants, which would improve the water environment and effectively maintain the water ecological function. This research on the WEC of the Yangtze River may serve as a basis for pollution control and water quality management, and exemplifies WEC calculations of the world’s largest rivers.

Analysis of Persistent Organic Pollutants in Sediments of the Wanzhou Section of the Yangtze River

2012 ◽  
Vol 518-523 ◽  
pp. 2352-2355
Author(s):  
Jun Sheng Qi ◽  
Yu Ling Wang ◽  
Chuan Fu ◽  
Kun Xie
Keyword(s):  
Polychlorinated Biphenyls ◽  
Organochlorine Pesticides ◽  
Industrial Wastewater ◽  
Yangtze River ◽  
River Sediment ◽  
Water Environment ◽  
The Yangtze River ◽  
Point Source Pollution ◽  
The Impact ◽  
Direct Discharge

Organochlorine pesticides and polychlorinated biphenyls content can be obtained By measuring Wanzhou of the Yangtze River and Wanzhou Zhuxi River in sediment : Sediment content of organochlorine pesticides and polychlorinated biphenyls are increased the river down. Organochlorine pesticides in sediments are β-HCH> δ-HCH> α-HCH> γ-HCH, and pp'-DDE> pp '-DDD> op'-DDT> pp'-DDT. Organochlorine pesticides and PCBs of Wanzhou of the Yangtze River sediment in the distribution of the sampling points are similar characteristics. The main source of pollution is the direct discharge of industrial wastewater, agricultural pollution and soil erosion of farmland. Although OCPs and PCBs in water environment are very low, the impact on human health can not be ignored. Therefore certain measures are taken to clean emissions from industrial wastewater and agricultural non-point source pollution control.

scholarly journals Modelling the coupling evolution of the water environment and social economic system using PSO-SVM in the Yangtze River Economic Belt, China

2021 ◽  
Vol 129 ◽  
pp. 108012
Author(s):  
Chenning Deng ◽  
Haisheng Li ◽  
Dingzhi Peng ◽  
Lusan Liu ◽  
Qiuheng Zhu ◽  
...  
Keyword(s):  
Economic System ◽  
Yangtze River ◽  
Social Economic ◽  
Water Environment ◽  
The Yangtze River

scholarly journals Water Environment Carrying Capacity Assessment of Yangtze River Economic Belt Using Grey Water Footprint Model

2021 ◽  
Author(s):  
Peigui Liu ◽  
Xingyuan Yi ◽  
Yuan Feng ◽  
Manting Shang ◽  
Zhenxin Bao
Keyword(s):  
Point Source ◽  
Carrying Capacity ◽  
Yangtze River ◽  
Water Footprint ◽  
Water Environment ◽  
The Yangtze River ◽  
Grey Water ◽  
Footprint Model ◽  
The Past ◽  
Good State

Abstract Based on the grey water footprint theory and the characteristics of the water resources system, this paper constructs the evaluation index of the water environment carrying capacity of the Yangtze River Economic Belt, and calculates the point source grey water footprint, non-point grey water footprint, and water environmental carrying capacity of the study area from 2012 to 2017. The results show that the non-point source grey water footprint is much larger than the point source grey water footprint. The non-point source grey water footprint decreased from 1,089.75 billion m3 in 2014 to 1,038.7 billion m3 in 2017, indicating that the pollutants discharged into the water have been decreasing in the past four years. Besides, the water environment carrying capacity of the western and middle sections of the Yangtze River Economic Belt are in a good state, but the eastern section is overloaded.

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