ABSTRACT

ABSTRACT: In this study, a formula that separates the time-varying effect from observed dissolved oxygen (DO) data was derived. This formula calculates the steady-state DO profile along a biologically active river by “filtering” out the time-varying effect from field-measured diurnal DO curves along the river. As a result, both the model and the data used for its calibration are completely in a steady-state mode, so that model parameters which represent relevant transport and transformation processes can be determined properly.