کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
6412911 1629931 2014 14 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Dynamic rating curve assessment for hydrometric stations and computation of the associated uncertainties: Quality and station management indicators
ترجمه فارسی عنوان
ارزیابی منحنی رتبه پویا برای ایستگاه های هیدرومتریک و محاسبه عدم قطعیت های مرتبط: شاخص های مدیریت کیفیت و ایستگاه
موضوعات مرتبط
مهندسی و علوم پایه علوم زمین و سیارات فرآیندهای سطح زمین
چکیده انگلیسی


- We perform a dynamic rating curve assessment by plotting a curve for each gauging.
- We compute a model of uncertainty for each created rating curve.
- A streamflow data series is generated with confidences intervals.
- A variographic analysis is used to model the aging of the rating curves.
- We define indicators for the real time monitoring of hydrometric stations.

SummaryA rating curve is used to indirectly estimate the discharge in rivers based on water level measurements. The discharge values obtained from a rating curve include uncertainties related to the direct stage-discharge measurements (gaugings) used to build the curves, the quality of fit of the curve to these measurements and the constant changes in the river bed morphology. Moreover, the uncertainty of discharges estimated from a rating curve increases with the “age” of the rating curve. The level of uncertainty at a given point in time is therefore particularly difficult to assess.A “dynamic” method has been developed to compute rating curves while calculating associated uncertainties, thus making it possible to regenerate streamflow data with uncertainty estimates. The method is based on historical gaugings at hydrometric stations. A rating curve is computed for each gauging and a model of the uncertainty is fitted for each of them. The model of uncertainty takes into account the uncertainties in the measurement of the water level, the quality of fit of the curve, the uncertainty of gaugings and the increase of the uncertainty of discharge estimates with the age of the rating curve computed with a variographic analysis (Jalbert et al., 2011). The presented dynamic method can answer important questions in the field of hydrometry such as “How many gaugings a year are required to produce streamflow data with an average uncertainty of X%?” and “When and in what range of water flow rates should these gaugings be carried out?”.The Rocherousse hydrometric station (France, Haute-Durance watershed, 946 [km2]) is used as an example throughout the paper. Others stations are used to illustrate certain points.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Hydrology - Volume 517, 19 September 2014, Pages 173-186
نویسندگان
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