A Fusion Water Quality Soft-Sensing Method Based on WASP Model and Its Application in Water Eutrophication Evaluation

Table 2

RMSE values of each water quality index obtained by different methods.

Method	DO; (mg/L)	BOD; (mg/L)	NH3-N; (mg/L)	TN; (mg/L)	Chl_a; (mg/L)
Trial-and-error method	1.47	0.429	0.14	0.52	0.007
Nonlinear least squares	1.09	0.297	0.12	0.45	0.004
UKF	0.72	0.215	0.11	0.39	0.003