Details

Autor(en) / Beteiligte

• McMahon, Thomas A.
• Peel, Murray C.

Titel

Uncertainty in stage-discharge rating curves: application to Australian Hydrologic Reference Stations data

Ist Teil von

• Hydrological sciences journal, 2019-02, Vol.64 (3), p.255-275

Ort / Verlag

Abingdon: Taylor & Francis

Erscheinungsjahr

2019

Link zum Volltext

Quelle

Taylor & Francis Online Single Subscriptions

Beschreibungen/Notizen

• The purpose of this paper is to determine uncertainty in the gauged range of the stage-gauged discharge relationship for 622 rating curves from 171 Australian Bureau of Meteorology Hydrologic Reference streamgauging Stations (HRS). Water agencies use many methods to establish rating curves. Here we adopt a consistent method across all stations and develop rating curves based on Chebyshev polynomials, and estimate uncertainties from standard regression errors in which residuals from the polynomials are adjusted to ensure they are homoscedastic and normally distributed. Uncertainty in input water level is also taken into account. The median uncertainties in mean response of the available gauged discharge relationship at median daily discharges for the HRS dataset range from +4.5 to −4.2% (95% confidence band) and for individual gaugings from +29 to −22% incorporating a water level uncertainty of ±4 mm. The uncertainties estimated are consistent with values estimated in Australia and elsewhere.