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[Changes in Algal Particles and Their Water Quality Effects in the Outflow River of Taihu Lake].
Huan Jing Ke Xue. 2021 Jan 08; 42(1):242-250.HJ

Abstract

Connected rivers are a common engineering method to ensure the ecological health of urban water. However, for the lakes with serious cyanobacteria blooms, the algal particles are carried by the outflow of the lake and will have a significant impact on water quality. The location at which the Liangxi river meets Meiliang Bay of Lake Taihu was selected to explore the influence of the eutrophic lake on the connected rivers, and high-frequency monitoring was conducted in summer for three consecutive years to analyze the changes in the flux of cyanobacterial bloom particles in rivers and their impact on river water quality. The results show that:① The improvement of the algal cyanobacteria bloom in Meiliang Bay and the operation of the pressure-controlled algae well at the entrance of the river significantly reduced the concentration of chlorophyll a and the flux of algae particles in the Liangxi River. The average value of the concentration of chlorophyll a and the flux of algae particles in the river in summer 2019 were 54.34 μg·L-1 and 84.7 t·d-1, respectively, and significantly lower than those of 2017; ② Water diversion had a significant effect on improving the water quality of the receiving water. Except for DTP, the nitrogen and phosphorus concentrations of the remaining forms of the Liangxi River showed a downward trend from 2017 to 2019, indicating that the water quality of the Liangxi river improved after water transfer; ③ A large amount of cyanobacterial blooms entering the channel significantly increased the particulate nitrogen and phosphorus content of the water. From 2017 to 2019, the nitrogen and phosphorus in the Liangxi River were mainly PN and PP, accounting for 62.5% and 70.8% of TN and TP, respectively; ④ The water quality of the Beijing-Hangzhou Grand Canal and other connected rivers has not been affected by the algal particles in Meiliang Bay. In August 2019, the chlorophyll a content in the canal water decreased by 65% compared with that of June, indicating that cyanobacterial bloom particles have not accumulated in the Grand Canal; ⑤ On the premise that the cyanobacteria bloom in the lake has not been effectively improved, the algae particles carried by the water diversion will have an impact on the water quality and landscape of the local reach connecting the river.

Authors+Show Affiliations

School of Environment and Civil Engineering, Jiangnan University, Wuxi 214122, China. State Key Laboratory of Lake Science and Environment, Nanjing Institute of Geography and Limnology, Chinese Academy of Sciences, Nanjing 210008, China.State Key Laboratory of Lake Science and Environment, Nanjing Institute of Geography and Limnology, Chinese Academy of Sciences, Nanjing 210008, China.Wuxi Blue Algae Control Office, Wuxi 214000, China.Wuxi Branch of Jiangsu Bureau of Hydrology and Water Resources, Wuxi 214000, China.School of Environment and Civil Engineering, Jiangnan University, Wuxi 214122, China.State Key Laboratory of Lake Science and Environment, Nanjing Institute of Geography and Limnology, Chinese Academy of Sciences, Nanjing 210008, China.State Key Laboratory of Lake Science and Environment, Nanjing Institute of Geography and Limnology, Chinese Academy of Sciences, Nanjing 210008, China.

Pub Type(s)

Journal Article

Language

chi

PubMed ID

33372476

Citation

Guo, Yu-Long, et al. "[Changes in Algal Particles and Their Water Quality Effects in the Outflow River of Taihu Lake]." Huan Jing Ke Xue= Huanjing Kexue, vol. 42, no. 1, 2021, pp. 242-250.
Guo YL, Xu H, Chen XQ, et al. [Changes in Algal Particles and Their Water Quality Effects in the Outflow River of Taihu Lake]. Huan Jing Ke Xue. 2021;42(1):242-250.
Guo, Y. L., Xu, H., Chen, X. Q., Zheng, J. Z., Zhan, X., Zhu, G. W., & Zhu, M. Y. (2021). [Changes in Algal Particles and Their Water Quality Effects in the Outflow River of Taihu Lake]. Huan Jing Ke Xue= Huanjing Kexue, 42(1), 242-250. https://doi.org/10.13227/j.hjkx.202005241
Guo YL, et al. [Changes in Algal Particles and Their Water Quality Effects in the Outflow River of Taihu Lake]. Huan Jing Ke Xue. 2021 Jan 8;42(1):242-250. PubMed PMID: 33372476.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - [Changes in Algal Particles and Their Water Quality Effects in the Outflow River of Taihu Lake]. AU - Guo,Yu-Long, AU - Xu,Hai, AU - Chen,Xu-Qing, AU - Zheng,Jian-Zhong, AU - Zhan,Xu, AU - Zhu,Guang-Wei, AU - Zhu,Meng-Yuan, PY - 2020/12/29/entrez PY - 2020/12/30/pubmed PY - 2021/1/9/medline KW - connected rivers KW - cyanobacteria bloom KW - exchange flux of particulate organic matter KW - particulate chlorophyll a KW - water diversion project SP - 242 EP - 250 JF - Huan jing ke xue= Huanjing kexue JO - Huan Jing Ke Xue VL - 42 IS - 1 N2 - Connected rivers are a common engineering method to ensure the ecological health of urban water. However, for the lakes with serious cyanobacteria blooms, the algal particles are carried by the outflow of the lake and will have a significant impact on water quality. The location at which the Liangxi river meets Meiliang Bay of Lake Taihu was selected to explore the influence of the eutrophic lake on the connected rivers, and high-frequency monitoring was conducted in summer for three consecutive years to analyze the changes in the flux of cyanobacterial bloom particles in rivers and their impact on river water quality. The results show that:① The improvement of the algal cyanobacteria bloom in Meiliang Bay and the operation of the pressure-controlled algae well at the entrance of the river significantly reduced the concentration of chlorophyll a and the flux of algae particles in the Liangxi River. The average value of the concentration of chlorophyll a and the flux of algae particles in the river in summer 2019 were 54.34 μg·L-1 and 84.7 t·d-1, respectively, and significantly lower than those of 2017; ② Water diversion had a significant effect on improving the water quality of the receiving water. Except for DTP, the nitrogen and phosphorus concentrations of the remaining forms of the Liangxi River showed a downward trend from 2017 to 2019, indicating that the water quality of the Liangxi river improved after water transfer; ③ A large amount of cyanobacterial blooms entering the channel significantly increased the particulate nitrogen and phosphorus content of the water. From 2017 to 2019, the nitrogen and phosphorus in the Liangxi River were mainly PN and PP, accounting for 62.5% and 70.8% of TN and TP, respectively; ④ The water quality of the Beijing-Hangzhou Grand Canal and other connected rivers has not been affected by the algal particles in Meiliang Bay. In August 2019, the chlorophyll a content in the canal water decreased by 65% compared with that of June, indicating that cyanobacterial bloom particles have not accumulated in the Grand Canal; ⑤ On the premise that the cyanobacteria bloom in the lake has not been effectively improved, the algae particles carried by the water diversion will have an impact on the water quality and landscape of the local reach connecting the river. SN - 0250-3301 UR - https://www.unboundmedicine.com/medline/citation/33372476/[Changes_in_Algal_Particles_and_Their_Water_Quality_Effects_in_the_Outflow_River_of_Taihu_Lake]_ DB - PRIME DP - Unbound Medicine ER -