A Decentralized Water-Quality Control Scheme

The dynamics of water quality constituents in the River Nile is expressed by a linear continuous-time model. Two control actions are employed: the first is through the stream velocity, which is implemented by regulating the water discharge into the basin and the second is through the adjustment of the concentration of water quality constituents discharged from polluter stations. A decentralized control structure is used to adjust the concentration of water quality constituents. The unknown gains are computed by a three-level algorithm. Simulation results have demonstrated clearly the effectiveness of the analytical approach.