Allocation of unequally-weighted wastewater discharge loads using a simulation-optimization approach
| Autor: | Alper Elçi, M. Tamer Ayvaz, Derya Sadak |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2020 |
| Předmět: |
Optimization
Mathematical optimization Watershed Multi-pollutant 010504 meteorology & atmospheric sciences Turkey Computer science 0207 environmental engineering Waste load allocations 02 engineering and technology 01 natural sciences hydrological modeling Menderes Basin Load allocation weights Pollutant concentration sensitivity analysis discharge water management Water management strategies Sensitivity (control systems) pollutant transport 020701 environmental engineering 0105 earth and related environmental sciences Water Science and Technology watershed Pollutant Simulation optimization concentration (composition) Surface waters Process (computing) surface water river pollution Optimization approach Optimization modeling Variable (computer science) Nonlinear system wastewater treatment Wastewater Optimization formulations Water pollution Generalized reduced gradient Watersheds Waste load allocation Simulation |
| Popis: | In this study, a new simulation–optimization approach is proposed to solve the multi-pollutant waste load allocation (WLA) problems in surface water systems. The proposed approach simulates the fate and transport of multiple pollutants utilizing the AQUATOX model. Since AQUATOX is an independent model and its integration into the optimization process is computationally not efficient, a multi-pollutant concentration–response matrix (mpCRM) is developed by using the results of the AQUATOX model. This mpCRM is then integrated into an optimization model where a nonlinear generalized reduced gradient (GRG) optimization method is used. Unlike in previously conducted studies, a new optimization formulation is proposed wherein the multiple pollutant loads are allocated among the source locations depending on their pre-assigned load allocation weights. This formulation allows for an equal or variable pollutant load allocation plan among source locations depending on the water management strategy for the watershed. The applicability of the proposed approach is evaluated on a sub-watershed of the Küçük Menderes River Basin (KMRB) in Turkey by considering different load allocation scenarios. Furthermore, a detailed sensitivity analysis is conducted to evaluate the model results for different problem parameters. Identified results suggest that the proposed simulation–optimization approach is an effective way to solve the multi-pollutant WLA problem. © 2020 Elsevier B.V. |
| Databáze: | OpenAIRE |
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