5.1.1. Synthetic Flood Events

Overall, the performance of the prediction of the first intervals of flood events shows that more than 80% of the grids have errors smaller than 0.3 m. The accuracy table (see Table 1) shows that the ANN has good accuracy in the water depth prediction of first intervals for all the synthetic events in the testing dataset. This test validated the network structure as well as the resilient backpropagation for solving the ANN. Since the network is initially trained with the 120 events from the synthetic event database and validated with the rest 60 events. The training events and the validation events bear more similarities with each other, which could explain the good performance of the prediction of the first interval of the ANN.

#### 5.1.2. Historical Flood Events
