NWDTW 2024

A dynamic rating method called DYNPOUND, which accommodates compound and compact channel geometry, was developed to model hysteresis. From a pure hydrodynamics perspective, all rivers and streams have some form of hysteresis (loop effect) in the relation between stage and discharge because of unsteady flow as a flood wave passes. This dynamic rating method is capable of capturing hysteresis caused by variable energy slope, which is a result of unsteady momentum and pressure. The method and graphical user interface (GUI), which were written in the Python programming language, will be demonstrated. The GUI is intended for use by hydrographers to develop and validate ratings for complex sites. This presentation will briefly discuss the background, application, and workflow to operationalize the dynamic rating method for a gage.