The relative error of waterlogging's area and depth is 4.7 and 16.2%, respectively. Meanwhile the standard deviation of waterlogging's area and depth is 0.027 and 0.177, respectively. The comparison results show that the simulated results of urban waterlogging are consistent with the actual monitoring results, which shows that the simulation results of the model for urban waterlogging are relatively reliable. Finally, the relevant parameters determined according to the measured rainfall rate are shown in Table 2.
Land use types and parameters.
| Parameters . | Forest land . | Building . | Road . | Bare land . | Grassland . | Pervious pavement . | Rainwater garden . |
|---|---|---|---|---|---|---|---|
| Ks(mm/s) | 0.0105 | 0 | 0 | 0.00405 | 0.01 | 0.04 | 0.027 |
| S(mm) | 19.17 | 0 | 0 | 4.21 | 6.39 | 80 | 60 |
| D-value of Ks and S | 0 | 0 | 0.3 | 0.3 | 0.3 | 0.3 | 0.3 |
| Manning coefficient | 0.4 | 0.015 | 0.014 | 0.08 | 0.24 | 0.03 | 0.24 |
| Parameters . | Forest land . | Building . | Road . | Bare land . | Grassland . | Pervious pavement . | Rainwater garden . |
|---|---|---|---|---|---|---|---|
| Ks(mm/s) | 0.0105 | 0 | 0 | 0.00405 | 0.01 | 0.04 | 0.027 |
| S(mm) | 19.17 | 0 | 0 | 4.21 | 6.39 | 80 | 60 |
| D-value of Ks and S | 0 | 0 | 0.3 | 0.3 | 0.3 | 0.3 | 0.3 |
| Manning coefficient | 0.4 | 0.015 | 0.014 | 0.08 | 0.24 | 0.03 | 0.24 |