Optical characteristics and factors that influence representative Lakes in the Taihu Lake basin, China

From 2018 to 2019, a survey of a typical lakes system in the Taihu Lake basin, China, was carried out. To provide reference values for the restoration and management of submerged vegetation in the lakes, the optical attenuation coefficient (K d ) and euphotic depth (Z eu ) of the water body were cal...

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Bibliographic Details
Published in:Journal of freshwater ecology 2022-12, Vol.37 (1), p.243-257
Main Authors: Ren, Weixiang, Wu, Xiaodong, Chao, Jianying, Ge, Xuguang, Zhu, Shunmei, Zhou, Mengdie
Format: Article
Language:English
Subjects:
Aquatic plants
Attenuation coefficients
Chlorophyll
Chlorophyll a
Dissolved organic carbon
Dissolved organic matter
Distribution
Extinction coefficient
lake
Lake basins
Lakes
Mathematical analysis
nutrient salt
Nutrition
Optical properties
Phosphorus
Photosynthetically active radiation
photosynthetically active radiation (PAR)
Restoration
Solid suspensions
Submerged plants
Surveying
Suspended inorganic matter
Suspended matter
Suspended particulate matter
Suspended solids
Taihu Lake basin
Vegetation
Water bodies
Water depth
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Summary:From 2018 to 2019, a survey of a typical lakes system in the Taihu Lake basin, China, was carried out. To provide reference values for the restoration and management of submerged vegetation in the lakes, the optical attenuation coefficient (K d ) and euphotic depth (Z eu ) of the water body were calculated, and the distribution characteristics and factors that influenced the underwater optical field lands with different nutrition levels in the basin were analyzed. The main factor affecting the distribution of photosynthetically active radiation (PAR) in lakes in the Taihu Lake basin is suspended solids (SS), dominated by inorganic suspended matter (ISS). Chlorophyll a (Chl-a), dissolved organic carbon (DOC), and chromophoric dissolved organic matter (CDOM) all affect, although weakly, the optical characteristics of lake wetlands. In CDOM, humic-like components have a more significant impact on K d . The K d of lakes in the Taihu Lake basin is closely related to permanganate index (COD Mn ) and especially total phosphorus (TP); The growth of aquatic vegetation is increased in Shanghu, Dianshan-Yuandang, Yangcheng, and Wuli Lakes that have higher Z eu and Z eu /Depth values.
ISSN:0270-5060
2156-6941
DOI:10.1080/02705060.2022.2045231