Comparison of the Traditonal Methods with the Flood Simulation Method to Calculate Design Flood Control Storage

Assuming that the population model of flood stochastic process is known, the precison of design flood-control storage calculated by the traditional and the flood simulative method is preliminarily compared. The criterion of the precison evaluation is unbiasness and efficiency of design flood-control storge. In the traditional methods, two design flood hydrgraph enlarging methods are considered, one is same-frequency method, the other is same-multiple method. The Monte-Carlo results shows that the precision of design flood-control storage calculted by the flood simulation method is better than the traditional methods and the same-frequency method is better than the same-multiple method if the form of flood simulation model is correct.