Development of Multi-Objective Optimal Waste Model for Haraz River

With the rapid economic development, the water quality is getting worse in Haraz River Basin and the adjacent areas. To improve the water quality, the total inland pollutant load should be controlled effectively. Therefore, a simulation model for the prediction of the steady-state water quality in terms of BOD, based on Streeter Phelps equation, was developed. The Streeter-Phelps equation gives the response of DO concentration at each river reach to a BOD load concentration. In the next step, the optimization objective functions and water quality constraint equations were formulated and the linear programming method was used to calculate the environmental capacity. The optimization programming of minimum treatment cost produces non-uniform removal rate for pollution sources which suggest a broad range of minimum treatment cost.