Table 3.

Summary statistics of measured BOD and mean error statistics of BOD model predictions (concentrations and specific loads) in the calibration and validation datasets. Model parameters are in Table 1. MAE = mean absolute error. RMSE = root mean Square Error.

		Calibration		Validation
		Concentration mg O2/L	Load t/km2	Concentration mg O2/L	Load t/km2
Observations	Sample size	2156	2157	1131	1134
	5th percentile	0.73	0.21	0.66	0.22
	Mean	2.29	0.81	1.75	0.62
	95th percentile	5.65	1.92	3.62	1.21
	Max	41.18	36.14	32.8	8.34
Prediction errors	MAE	1.72	0.52	1.21	0.37
	RMSE	5.47	1.20	3.04	0.79
	Percent bias %	19.6	0.6	24.2	8.9