Distribution of Water Quality Chemical Parameters

Chemical parameters play a critical role in maintaining the chemical balance of aquatic environments. Chemical substances entering a water body—whether pollutants or naturally occurring compounds—can be simulated to evaluate their concentration distribution patterns. Any chemical parameter can be modeled effectively once its environmental behavior and transport processes (fate) are understood. The chemical interactions that occur within the water column between discharged substances and the existing chemical constituents of the aquatic environment are essential components of the modeling process. After the transport and transformation characteristics have been identified, modeling scenarios can be developed by incorporating the hydrodynamic processes that govern water movement. These scenarios are designed according to the type of chemical substance released and the hydrodynamic conditions influencing its transport and dispersion.

The Hydrodynamic Model is used to simulate water circulation patterns and water levels, providing the physical framework for predicting the distribution of chemical parameters. The Advection–Dispersion Model is the primary tool for simulating the transport, dispersion, and environmental fate of dissolved chemical substances. The Suspended Sediment Transport and Particle Tracking Models are specifically applied to evaluate the behavior of chemical compounds associated with suspended sediments and particulate matter. For petroleum-derived contaminants, particularly Polycyclic Aromatic Hydrocarbons (PAHs), the Oil Spill Analysis Model is used to simulate their transport, weathering, and environmental impacts. Where river discharge significantly influences the study area, the River Flow Model is incorporated to account for freshwater inflows that serve as important sources of chemical constituents. Finally, the Marine GIS Model integrates all simulation outputs into a Geographic Information System (GIS), enabling efficient spatial visualization, interpretation, and decision-making.