The oasis and hydro-control of oasis were treated as a complex system and the components, variables and the structural figure for the system were developed.

Based on typical complex hydraulic system with upper and lower surge tanks, different models of hydro-turbine and conduit system used in power system transient stability analysis are presented.

The Dongpinghu lake is the hydro-complex for water regulating and transfer in the east route of South-to-North water transfer.