Journal of Ecology and Rural Environment ›› 2022, Vol. 38 ›› Issue (4): 437-445.doi: 10.19741/j.issn.1673-4831.2021.0501

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Distribution Characteristics of Suspended Solids in Lakes with Different Eutrophic Levels in Southeastern Hubei Province

WU Chao1, WU Xiao-dong1, LIN Gui-ying1, FENG Lian1, YU Xin-hui1, ZHAO Jin-long1, YANG Zi-wen1, REN Wei-xiang2,3   

  1. 1. College of Urban and Environmental Sciences, Hubei Normal University, Huangshi 435002, China;
    [KG*2]2. China Aero Geophysical Survey and Remote Sensing Center for Natural Resources, Beijing 100083, China;
    [KG*2]3. School of Earth Sciences and Resources, China University of Geosciences (Beijing), Beijing 100083, China]
  • Received:2021-08-17 Online:2022-04-22 Published:2022-04-22

Abstract: Water quality monitoring of four lakes with different eutrophic levels (Xiandao Lake, Liangzi Lake, Cihu Lake, and Cehu Lake) in southeastern Hubei Province was conducted from 2018 to 2019, and the spatial-temporal distribution characteristics of suspended solids and the influencing factors were analyzed. It is expected that the results of this research could provide references for pollution control and ecological restoration of lakes with different eutrophic levels. The following results were obtained: The eutrophic levels of the four lakes were significantly different, the relative order of the comprehensive trophic level index (TLI) values were Xiandao Lake (29.67) < Liangzi Lake (50.62) < Cihu Lake (61.78) < Cehu Lake (69.34). The annual average concentrations of total suspended solids (TSS) in Xiandao Lake, Liangzi Lake, Cihu Lake, and Cehu Lake were (10.16±4.57), (12.42±6.86), (25.03±13.42), and (45.17±14.72) mg·L-1, respectively; the relative order of the TSS values was consistent with the relative order of the TLI values. The suspended solids in Liangzi Lake and Cihu Lake were mainly composed of inorganic suspended solids (ISS) in all seasons. Organic suspended solids (OSS) was the main component of the suspended matter in Cehu Lake in autumn, while ISS was the main component of the suspended solids in spring, summer, and winter. The suspended solids in Xiandao Lake were mainly composed of OSS in the spring and ISS in the other three seasons. The suspended solids in Xiandao Lake were mainly composed of fine particles of sediments and debris that entered the water body through surface runoff. The suspended solids in Liangzi Lake, Cihu Lake, and Cehu Lake were not only from the runoff inputs, but were also made up of fine particles, algae particles, and aquatic plant residues from sediment resuspension, and inorganic particulate matter was the main component of the suspended solids. The TSS concentration in the four lakes with different eutrophic levels was significantly positively correlated with TN and TP; therefore, the content of suspended solids can reflect the lake's eutrophic level.

Key words: southeastern Hubei Province, lake, suspended solids, spatial-temporal distribution characteristics

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