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

Table 2

Manning’s roughness coefficient () inverse results of assimilating different quantities of water level data.

Test	Data	Initial values	Inversed value	Iteration times
1	All cells	0.010000	0.020001	21
2	One-half of all cells	0.010000	0.019998	32
3	One-tenth of all cells	0.010000	0.019995	39
4	Four cells	0.015000	0.019991	51