A Study of the Transport of Marine Pollutants Using Adjoint Method of Data Assimilation with Method of Characteristics

Table 6

The results of the adjoint model using CFD and CDS.

Method	Time step size (h)	Relative magnitude of the cost function	Mean absolute error of observation points
			Before assimilation; (mg/L)	After assimilation; (mg/L)	Rate of decline
CFD	48	2.7084×10^−3	0.53359	0.02083	96.10%
CDS	24	4.4638×10^−3	0.59472	0.03060	94.86%