Effects of Sediment Dredging on Nutrient Release and Eutrophication in the Gate-Controlled Estuary of Northern Taihu Lake

Table 2

TN and TP concentrations and release rates and CNPI values.

		Concentrations (mg/L)		Release rate (mg/(m^2·d))		Pollution risk
		TN	TP	TN	TP	CNPI
Dredged	SR	1.67–6.32	0.01–0.07	51.42	0.50	1.96
	DR	3.31–21.04	0.05–1.23	164.75	5.83	7.01
Undredged	SR	2.24–5.98	0.03–0.15	61.92	1.33	2.39
	DR	5.28–16.69	0.05–0.52	196.58	6.42	7.66
All samples	SR	3.00 ± 0.54	0.06 ± 0.04	56.67 ± 7.42	0.92 ± 0.59	2.34 ± 0.08
	DR	9.93 ± 0.75	0.31 ± 0.05	180.67 ± 22.51	6.13 ± 0.41	7.34 ± 0.46

Note: SR and DR are the static releases and dynamic releases, respectively.