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Lacustrine micro-ecosystem responses to the inflow discharge gradient of water diversion from Yangtze River to Lake Taihu.
Environ Geochem Health. 2020 Mar; 42(3):1021-1032.EG

Abstract

Water diversion project is always taken as the emergency and effective engineering measure to deal with the cyanobacterial blooms in eutrophic lakes. The inflow discharge and duration are the critical parameters influencing the effects and costs of the water diversion activities. Due to the impacts of meteorological and hydrological factors such as precipitation and wind-wave currents, the environmental influence of water diversion on shallow eutrophic lakes is always unclear. To explore the quantitative relationships among inflow discharges, duration and ecological parameters in water-receiving lakes, the typical water diversion engineering-Water Diversion Project from Yangtze River to Lake Taihu was taken as an example and the mesocosm experiment modeling the micro-ecosystem of the water-receiving Meiliang Bay in Lake Taihu was conducted with five groups of inflow discharges according to the practical discharges of the main river channel-Wangyu River. Each micro-ecosystem had a volume of 15 L and was studied for a period of 30 days (25 days for the water diversion period and 5 days for the stop period). The results showed that the inflow discharges had different extents of impact on the physicochemical and biological characteristics of the micro-ecosystems. The concentrations of total dissolved solids, total nitrogen, nitrate, active silicate and bacterial abundance in the experimental groups (inflow discharges > 100 m3/s) were all decreased compared with the control group, with the lowest values in the period of 10-15 days. During the stop period, the concentrations of sensitive biotic and abiotic parameters were all recovered with different extents and different from the initial state of this experiment, which revealed that the effects of the short-term water diversion on lake ecosystems were resilient and durable. There were quantitative relationships among the inflow discharge, content interpolation and variation in water nutrients, with different relationships in different periods of the water diversion. The influence of water diversion on lake ecosystems was not only related to the direct impacts of allochthonous inputs, but also with the indirect effects of internal habitat variation in lakes.

Authors+Show Affiliations

State Key Laboratory of Hydrology-Water Resources and Hydraulic Engineering, Nanjing Hydraulic Research Institute, Nanjing, 210029, People's Republic of China. jydai@nhri.cn.State Key Laboratory of Hydrology-Water Resources and Hydraulic Engineering, Nanjing Hydraulic Research Institute, Nanjing, 210029, People's Republic of China. sqwu@nhri.cn.State Key Laboratory of Hydrology-Water Resources and Hydraulic Engineering, Nanjing Hydraulic Research Institute, Nanjing, 210029, People's Republic of China.State Key Laboratory of Hydrology-Water Resources and Hydraulic Engineering, Nanjing Hydraulic Research Institute, Nanjing, 210029, People's Republic of China.State Key Laboratory of Hydrology-Water Resources and Hydraulic Engineering, Nanjing Hydraulic Research Institute, Nanjing, 210029, People's Republic of China.Jiangsu Environmental Monitoring Center, Nanjing, 210029, People's Republic of China.State Key Laboratory of Hydrology-Water Resources and Hydraulic Engineering, Nanjing Hydraulic Research Institute, Nanjing, 210029, People's Republic of China.State Key Laboratory of Hydrology-Water Resources and Hydraulic Engineering, Nanjing Hydraulic Research Institute, Nanjing, 210029, People's Republic of China.State Key Laboratory of Hydrology-Water Resources and Hydraulic Engineering, Nanjing Hydraulic Research Institute, Nanjing, 210029, People's Republic of China.Nanjing Guohuan Science and Technology Co. Ltd., Nanjing Institute of Environmental Sciences, MEP, Nanjing, 210042, People's Republic of China.

Pub Type(s)

Journal Article

Language

eng

PubMed ID

31858359

Citation

Dai, Jiangyu, et al. "Lacustrine Micro-ecosystem Responses to the Inflow Discharge Gradient of Water Diversion From Yangtze River to Lake Taihu." Environmental Geochemistry and Health, vol. 42, no. 3, 2020, pp. 1021-1032.
Dai J, Wu S, Sha H, et al. Lacustrine micro-ecosystem responses to the inflow discharge gradient of water diversion from Yangtze River to Lake Taihu. Environ Geochem Health. 2020;42(3):1021-1032.
Dai, J., Wu, S., Sha, H., Wu, X., Yang, Q., Lv, X., Zhu, S., Xue, W., Wang, F., & Chen, D. (2020). Lacustrine micro-ecosystem responses to the inflow discharge gradient of water diversion from Yangtze River to Lake Taihu. Environmental Geochemistry and Health, 42(3), 1021-1032. https://doi.org/10.1007/s10653-019-00483-4
Dai J, et al. Lacustrine Micro-ecosystem Responses to the Inflow Discharge Gradient of Water Diversion From Yangtze River to Lake Taihu. Environ Geochem Health. 2020;42(3):1021-1032. PubMed PMID: 31858359.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Lacustrine micro-ecosystem responses to the inflow discharge gradient of water diversion from Yangtze River to Lake Taihu. AU - Dai,Jiangyu, AU - Wu,Shiqiang, AU - Sha,Haifei, AU - Wu,Xiufeng, AU - Yang,Qianqian, AU - Lv,Xueyan, AU - Zhu,Senlin, AU - Xue,Wanyun, AU - Wang,Fangfang, AU - Chen,Dan, Y1 - 2019/12/20/ PY - 2019/03/25/received PY - 2019/11/23/accepted PY - 2019/12/21/pubmed PY - 2020/6/24/medline PY - 2019/12/21/entrez KW - Bacterial abundance KW - Inflow discharge KW - Physicochemical parameters KW - Quantitative relationship KW - Water diversion SP - 1021 EP - 1032 JF - Environmental geochemistry and health JO - Environ Geochem Health VL - 42 IS - 3 N2 - Water diversion project is always taken as the emergency and effective engineering measure to deal with the cyanobacterial blooms in eutrophic lakes. The inflow discharge and duration are the critical parameters influencing the effects and costs of the water diversion activities. Due to the impacts of meteorological and hydrological factors such as precipitation and wind-wave currents, the environmental influence of water diversion on shallow eutrophic lakes is always unclear. To explore the quantitative relationships among inflow discharges, duration and ecological parameters in water-receiving lakes, the typical water diversion engineering-Water Diversion Project from Yangtze River to Lake Taihu was taken as an example and the mesocosm experiment modeling the micro-ecosystem of the water-receiving Meiliang Bay in Lake Taihu was conducted with five groups of inflow discharges according to the practical discharges of the main river channel-Wangyu River. Each micro-ecosystem had a volume of 15 L and was studied for a period of 30 days (25 days for the water diversion period and 5 days for the stop period). The results showed that the inflow discharges had different extents of impact on the physicochemical and biological characteristics of the micro-ecosystems. The concentrations of total dissolved solids, total nitrogen, nitrate, active silicate and bacterial abundance in the experimental groups (inflow discharges > 100 m3/s) were all decreased compared with the control group, with the lowest values in the period of 10-15 days. During the stop period, the concentrations of sensitive biotic and abiotic parameters were all recovered with different extents and different from the initial state of this experiment, which revealed that the effects of the short-term water diversion on lake ecosystems were resilient and durable. There were quantitative relationships among the inflow discharge, content interpolation and variation in water nutrients, with different relationships in different periods of the water diversion. The influence of water diversion on lake ecosystems was not only related to the direct impacts of allochthonous inputs, but also with the indirect effects of internal habitat variation in lakes. SN - 1573-2983 UR - https://www.unboundmedicine.com/medline/citation/31858359/Lacustrine_micro_ecosystem_responses_to_the_inflow_discharge_gradient_of_water_diversion_from_Yangtze_River_to_Lake_Taihu_ L2 - https://doi.org/10.1007/s10653-019-00483-4 DB - PRIME DP - Unbound Medicine ER -