Abstract
The Pearl River delta channel network in the 1950s and 1990s is modeled and validated, and the hydrodynamic characteristic is analyzed during flood and drought at the same time. The study result shows that the model well simulates the real situation, which can be used for hydrodynamic characteristics analysis; There were obvious split ratio changes in the main branch in the late 50 years, the change degree of node in North River and near by is greater than West River’s. The waterlevel line of the West River main stream in the 1990s is generally lower than in the 1950s, especially the upstream of West River is more dramatic decline. River terrain changes caused by intensive human activities is the main reason why hydrodynamic force of the Pearl River Delta channel network district changed for the past 50 years.
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