Large scale system simulation for flood and anti-flood counter measures in Pearl River delta

A large scaled simulation system for modeling the flood in Pearl River delta is established.The whole river networks,all river mouths of the delta and the sea bay are included in the system.The water levels,discharges of the rivers in the complicated networks,the discharge ratios of river forks,the discharge allocations of river mouths as well as the flow regimes in the sea bays under the mutual action of river runoff and tide are simulated.The model is calibrated and verified by the newest topographic and hydrological data obtained in 1999.According to the simulation results,countermeasures for flood prevention are proposed.