由河道输入太湖的含营养盐泥沙拦截试验

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Abstract The sediment trap experiment was conducted at the estuary of Dapu River to study the feasibility of using sediment trap to reduce the exogenous sediment and nutrients into Lake Taihu. The results showed that the sediment trap could effectively collect the exogenous sediment and the nutrients carried by the river. The sediment trap was deposited at an average rate of -33.99m³/month, and the maximum monthly sedimentation (66.34m³) appeared in September. The annual-averaged collection of suspended solids, total nitrogen, and total phosphorus were 407.89m³, 236.91kg, 36.46kg, respectively. The sediment and nutrients collected by the sediment trap mainly came from the Dapu River, which mainly came from locals in the center observation station. Correlation analysis showed that the sediment trap’s intercepting capacity for total phosphorus was better than that of total nitrogen. Therefore, this paper proposed to excavate sediment traps along the shoreline of the west bank of Lake Taihu, where the estuaries were the densest, which could effectively reduce the load of exogenous sediment and nutrients in Lake Taihu. This study provided a new method for the problem of eutrophication in Lake Taihu.

Key words： sediment trap exogenous sediment settling cylinder total nitrogen total phosphorus

Received: 13 September 2021

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X524

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	Articles by authors
	HE Xiang-yu
	YAN Wen-ming
	WU Ting-feng
	YANG Teng-teng
	HU Run-tao

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HE Xiang-yu,YAN Wen-ming,WU Ting-feng等. Interception experiment of nutrient-laden cohesive sediment imported from river channel into Lake Taihu[J]. CHINA ENVIRONMENTAL SCIENCECE, 2022, 42(4): 1854-1860.

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http://www.zghjkx.com.cn/EN/ OR http://www.zghjkx.com.cn/EN/Y2022/V42/I4/1854

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