Analysis of the Properties of Adjoint Equations and Accuracy Verification of Adjoint Model Based on FVM

Table 3

Different case of Manning’s roughness coefficient inversion.

Case	Data	Initial values	Inversed value	Iteration times
1	All cells	0.015000	0.019977	29
2	One-half of all cells	0.015000	0.020045	37
3	One-tenth of all cells	0.015000	0.019964	52
4	Four cells	0.017000	0.019959	73