TY - GEN

T1 - Application of point-estimation method to calculate uncertainties in discharges from stage-discharge ratings

AU - Schmidt, Arthur R.

PY - 2004

Y1 - 2004

N2 - Most discharge records are developed using stage-discharge relations (ratings) to estimate the discharge based on measured water stages, permitting a fast and relatively inexpensive means to determine the discharge. However, for all but the simplest stage-discharge ratings, uncertainties in the resulting discharges have either been ignored or were based on a statistical estimate of the fit between the rating and calibration measurements. Recent research has demonstrated the feasibility of developing stage-discharge ratings theoretically, rather than empirically, providing unprecedented opportunity to examine the uncertainties in the rating and in discharges determined from the rating. Reliability-analysis methods, particularly, the point estimation method, can be applied to estimate the uncertainty in discharges determined from theoretically developed ratings and appropriately addresses complicating factors such as correlation among independent variables. This paper presents an overview of the application of reliability-analysis methods to determine the uncertainty in theoretical developed ratings. An example for an existing gauging station shows the uncertainties in discharges determined from the theoretical rating and the stage record from the site.

AB - Most discharge records are developed using stage-discharge relations (ratings) to estimate the discharge based on measured water stages, permitting a fast and relatively inexpensive means to determine the discharge. However, for all but the simplest stage-discharge ratings, uncertainties in the resulting discharges have either been ignored or were based on a statistical estimate of the fit between the rating and calibration measurements. Recent research has demonstrated the feasibility of developing stage-discharge ratings theoretically, rather than empirically, providing unprecedented opportunity to examine the uncertainties in the rating and in discharges determined from the rating. Reliability-analysis methods, particularly, the point estimation method, can be applied to estimate the uncertainty in discharges determined from theoretically developed ratings and appropriately addresses complicating factors such as correlation among independent variables. This paper presents an overview of the application of reliability-analysis methods to determine the uncertainty in theoretical developed ratings. An example for an existing gauging station shows the uncertainties in discharges determined from the theoretical rating and the stage record from the site.

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M3 - Conference contribution

AN - SCOPUS:23844473352

SN - 0784407371

SN - 9780784407370

T3 - Proceedings of the 2004 World Water and Environmetal Resources Congress: Critical Transitions in Water and Environmetal Resources Management

SP - 2204

EP - 2213

BT - Proceedings of the 2004 World Water and Environmetal Resources Congress

A2 - Sehlke, G.

A2 - Hayes, D.F.

A2 - Stevens, D.K.

T2 - 2004 World Water and Environmental Resources Congress: Critical Transitions in Water and Environmental Resources Management

Y2 - 27 June 2004 through 1 July 2004

ER -