基于GAM模型的洞庭湖叶绿素a浓度与环境因子相关性分析

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Abstract From January to December in 2019, the samples were collected in Dongting Lake to analyze the correlation between the chlorophyll a distribution and concentration with environmental factors by using the generalized additive model (GAM). The results showed the strong temporal and spatial variations of chlorophyll a concentration appeared, annual average value was 5.77μg/L ranging from 1.00 to 67.33μg/L for the single influencing factor GAM model. The most influential factors in the variations of chlorophyll a concentration differed among seasons, with COD_Mn, Cond and TP for spring; COD_Mn, WT and Cond for summer and autumn respectively; NH₄⁺-N and Cond for winter. For the multiple influencing factors GAM model the explanation result was better with an overall rate for 97.5% for the variations in chlorophyll a concentration. The environmental factors affecting the variations in chlorophyll a concentration ranked as COD_Mn>TP>Cond>NH₄⁺-N>TN/TP, and all factors exhibited a non-linear relationship with chlorophyll a concentration.

Key words： Dongting Lake chlorophyll a concentration environmental factors GAM model correlation

Received: 06 May 2021

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X524

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	Articles by authors
	YAN Guang-han
	YIN Xue-yan
	WANG Xing
	WANG Li-jing
	LI Dan
	TIAN Ze-bin
	LI Hong

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YAN Guang-han,YIN Xue-yan,WANG Xing等. Analysis based on GAM model for the relationship between chlorophyll a concentration and environmental factors in Dongting Lake[J]. CHINA ENVIRONMENTAL SCIENCECE, 2022, 42(1): 313-322.

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http://www.zghjkx.com.cn/EN/ OR http://www.zghjkx.com.cn/EN/Y2022/V42/I1/313

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