TABLE 5.

Model performance based on the observed microbial concentrations in 2010–2015 during days when the Danube discharged into the backwater branch and when rainfall occurred.

Parameter	Observed dataset	Observed median (minimum, maximum)	OF (Equation 14)	Mean absolute error	Kruskal–Wallis test
	Detected/n	[particles/L]		[log10 particles/L]	p
Human MST marker	9/10	4.1 × 103 (640, 9.3 × 104)	1.34	0.67	0.33
Ruminant MST marker	10/16	708 (56, 1.64 × 104)	0.70	0.61	0.91
Pig MST marker	6/15	231 (65, 1.29 × 104)	1.17	0.50	0.33
Bird MST marker	14/16	7.04 × 103 (89, 8.37 × 104)	1.53	0.69	0.16
E. coli	16/16	220 (10, 7.0 × 103)	1.19	0.62	0.44

Objective function values (OF), mean absolute error and Kruskal–Wallis p-values after comparison of the simulated and observed microbial concentrations in the backwater branch. Non-detects were replaced by half of the TOD (MST markers) or LOD (E. coli). Simulated values below the half of the LOD or the lowest TOD were set to the half of the LOD or lowest TOD.