It is expected that Huaihe river network database will benefit environmental protection program by
providing powerful simulation database for Huaihe river basin. Application a drainage basin for water
pollution control has two simulating tasks. First type of tasks needs tracing up capability along river
network. There may be many monitoring stations set up by the river at different locations. When any
station detects outstanding pollution, the immediate task is to locate the potential pollution resource. The
hydrographic network provides the tracing up capability form any location at a river drainage basin (Fig.3)