Stage-discharge relationship uncertainties

Abstract

The stage-discharge relayionships are the basic tool for transformation of observed water stages to streamflow discharges. As such, they have a key role in subsequent hydrological, hydraulic and water resources analyses. Uncertainties inherent in the stage-discharge relationships are the result of multiple causes; the complexity of the nature of catchment runoff, physics of water flow, its determination and interpretation. Тhe contemporary approach to the uncertainty definition is given, through definitions of the terms and calculation formulas. The method for stagedischarge curve uncertainty assesment, based on the ISO standard is presented. Used data are from the gauging station Bajina Bašta (the Drina river).