A simulation-optimization approach for assessing optimal wastewater load allocation schemes in the Three Gorges Reservoir, China

Environmental Systems Research

Table 2 Error analysis between simulated and observed verification parameters

Variable	Mean error	Absolute mean error	Absolute relative mean error
Water surface level (m)	0.081	1.004	0.65%
Velocity (m/s)	0.048	0.058	5.53%
DO (mg/L)	0.073	0.353	4.34%
NH₄⁺-N (mg/L)	0.008	0.051	16.51%
COD (mg/L)	0.233	1.537	20.94%