Solute Transport Processes in Wetlands Application of Data Based Mechanistic and Transient Storage Models

The aim of this paper is the analysis of solute transport processes in Upper Narew River based on the results of tracer experiment. Data Based Mechanistic and transient storage models were applied to Rhodamine WT tracer observations. We focus on the analysis of uncertainty and the sensitivity of model predictions to varying physical parameters, such as dispersion and channel geometry. The study is based on a combined Global Sensitivity Analysis (GSA) and Generalized Likelihood Uncertainty Estimation (GLUE). The breakthrough curves for the chosen cross-sections are compared with those simulated with 95% confidence bounds. Apart from the predictions of the pollutant transport trajectories, two ecological indicators are also studied (time over the threshold concentration and maximum concentration). These indicators show an interesting multi-modal dependence on model parameters.