Water pollution characteristics and analysis of Chaohu Lake basin by using different assessment methods

Yang, Xiong; Cui, Hongbiao; Liu, Xiaosheng; Wu, Qiugang; Zhang, Hui

doi:10.1007/s11356-020-08189-2

Cited by 41 publications

(23 citation statements)

References 48 publications

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“…In this study, we selected a 20 km river area away from the entrance of the Chaohu Lake and a buffer zone extending 200 m outwards on the left and right sides of the water body boundary as the study area, considering the physical form of the rivers and the topography. The area comprising the river section was evenly divided into the upper (I), middle (II), lower (III), and lake entrance (IV) sections [ 30 , 31 , 32 ]: section I was denoted the river section group I, section II of each area was denoted the river section group II, section III was denoted the river section group III, and section IV of each area was denoted the river section group IV [ 33 , 34 , 35 ]. We set the distance between the different river sections to 2 km to study the impact of different river sections being inhabited on birds.…”

Section: Methodsmentioning

confidence: 99%

Impact of Urbanisation Intensity on Bird Diversity in River Wetlands around Chaohu Lake, China

Zhou

Xia

et al. 2022

Animals

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Urbanisation is known to result in ‘urban stream syndrome’, which poses a huge threat to the river health. Birds, which are an important part of the river ecosystem, are sensitive to environmental changes in the basin. The ratio of the impervious surface area is a macroscopic indicator of urbanisation intensity in river basins. In this study, we combined the results of a year-round field survey of seven river wetlands around Chaohu Lake (China) with satellite remote sensing image data from the same period. The species richness at sections of the lake entrance was higher than in the middle sections of the river, and the Shannon–Wiener index during autumn was higher than that during winter. The waterbird diversity index declined exponentially with increases in the intensity of urbanisation. The changes in the land use patterns around river wetlands associated with urbanisation resulted in the loss of food resources and habitats. Therefore, the intensity of urbanisation was an important driving factor that leads to changes in the bird community structure of river wetlands, so it had a significant impact on the diversity of river wetland birds in all four seasons combined with a variety of influencing factors. Our research could be a guide for urban landscape planning and bird diversity protection. For example, the results suggested that it is necessary to identify river wetlands as an important part of the urban ecosystem, reduced building area, increased vegetation coverage, and retained slope protection and river beach land.

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Section: Methodsmentioning

confidence: 99%

Impact of Urbanisation Intensity on Bird Diversity in River Wetlands around Chaohu Lake, China

Zhou

Xia

et al. 2022

Animals

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“…Chaohu Lake plays a key role in the social, economic, and ecological functions of the local basin. However, the excessive discharge of industrial and municipal wastewater caused by rapid industrialization and urbanization has led to the heavy pollution of Chaohu Lake [18][19][20][21]. To improve the water quality of Chaohu Lake, the nutrients flowing into the lake must first be reduced.…”

Section: Study Sitementioning

confidence: 99%

Pollutant Removal Efficiency of a Bioretention Cell with Enhanced Dephosphorization

Lin

2022

Water

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Low impact development can contribute to Sustainable Development Goals (SDGs) 2, 6, 7, 11, and 13, and bioretention cells are commonly used to reduce nonpoint source pollution. However, although bioretention is effective in reducing ammonia nitrogen and chemical oxygen demand (COD) pollution, it performs poorly in phosphorus removal. In this study, a new type of enhanced dephosphorization bioretention cell (EBC) was developed; it removes nitrogen and COD efficiently but also provides excellent phosphorus removal performance. An EBC (length: 45 m; width: 15 m) and a traditional bioretention cell (TBC) of the same size were constructed in Anhui, China, to treat rural nonpoint source pollution with high phosphorus concentration levels. After almost 2 years of on-site operation, the ammonium nitrogen removal performance of the TBC was 81%, whereas that of the EBC was 78%. The COD removal rates of the TBC and EBC were 51% and 65%, and they removed 51% and 92% of the total phosphorus, respectively. These results indicate that the TBC and EBC have similar performance in the removal of ammonium nitrogen and COD, but the EBC significantly outperforms the TBC in terms of total phosphorus removed.

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“…The comprehensive water quality identification index (CWQII) developed by Xu [26] is widely used in the water quality assessment in China [12,14]. This method has several advantages: it can perform both qualitative and quantitative evaluation of water quality; it can be used not only to evaluate the water quality of different sections in the same river, but also to compare the water quality in different rivers; it can avoid the influence of an individual water quality indicator, so that the integrated condition of the water quality can be reflected reasonably; and it can not only divide the water quality into different categories, but also compare the water quality of the same category [12]. The calculation of CWQII is given as follows.…”

Section: Comprehensive Water Quality Identification Index (Cwqii)mentioning

confidence: 99%

“…Since the 1960s, many water quality indexes have been developed to assess water quality for different conditions. Yang et al [12] used several different methods to assess the water quality of Chaohu Lake basin in China and found that the comprehensive water quality identification index (CWQII) could better assess the water quality compared with the other methods by providing qualitative and quantitative analysis. Because of this advantage, the CWQII method had wide application in the water quality assessment of the lakes and rivers in China, such as Honghu Lake [13], Donghu Lake [14], and Hanjiang River [15].…”

Section: Introductionmentioning

confidence: 99%

Are the Water Quality Improvement Measures of China’s South-to-North Water Diversion Project Effective? A Case Study of Xuzhou Section in the East Route

Pan

Yuan

Sun

et al. 2020

IJERPH

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Xuzhou is the hub city of the east route of China’s South-to-North Water Diversion (SNWD) project and implemented dozens of measures to ensure the water quality security of the water transmission line. In order to detect the effectiveness of water quality improvement measures, the monthly water quality data of five water quality parameters from 2005 to 2015 of six state-controlled monitoring sites in Xuzhou section were selected for analysis. The results showed that the water quality improved from 2.95 in 2005 to 2.74 in 2015, as assessed by the comprehensive water quality identification index (CWQII), and basically reached the Class III standards of China’s Environmental Quality Standard for Surface Water (GB3838-2002) from 2011 to 2015. The trend analysis showed that the decline of ammonia nitrogen (NH3-N) was the most obvious among the five water quality parameters. However, the concentrations of phosphorus (TP) showed significant upward trends at three sites. The positive abrupt change of time series of water quality occurred in 2009–2011. The identification of influencing factors of water quality changes by multivariate statistical methods found that the urbanization factor accompanied by a decrease in agricultural nonpoint source pollution emissions and the enhancement of wastewater treatment capacity, the closure of factories with substandard emissions and precipitation were the major influencing factors of most water quality parameters, which confirmed the effectiveness of measures for water quality improvement in Xuzhou.

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Water pollution characteristics and analysis of Chaohu Lake basin by using different assessment methods

Cited by 41 publications

References 48 publications

Impact of Urbanisation Intensity on Bird Diversity in River Wetlands around Chaohu Lake, China

Impact of Urbanisation Intensity on Bird Diversity in River Wetlands around Chaohu Lake, China

Pollutant Removal Efficiency of a Bioretention Cell with Enhanced Dephosphorization

Are the Water Quality Improvement Measures of China’s South-to-North Water Diversion Project Effective? A Case Study of Xuzhou Section in the East Route

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