Random walk method for modeling water exchange: An application to coastal zone environmental management

This study introduces a modeling approach for simulation of water exchange based on the random walk particle tracking method. The water exchange is characterized by a water exchange matrix. The novel features of this model lie in its flexibility of operation and time saving in simulation. The feasibility of this model is demonstrated in simulation case studies conducted in the Tianjin coastal area. The model can be applied to track water exchange between water bodies in estuaries and coastal ocean for simulation and characterization of solute transport, and predict water body self-purification capacity. This model can serve as a useful tool for forecast and assessment of potential water quality issues in coastal environment.