GSTDTAP  > 资源环境科学
DOI10.1029/2018WR023389
Shift Happens! Adjusting Stage-Discharge Rating Curves to Morphological Changes at Known Times
Mansanarez, V1,2; Renard, B.1; Le Coz, J.1; Lang, M.1; Darienzo, M.1
2019-04-01
发表期刊WATER RESOURCES RESEARCH
ISSN0043-1397
EISSN1944-7973
出版年2019
卷号55期号:4页码:2876-2899
文章类型Article
语种英语
国家France; Sweden
英文摘要

Establishing streamflow time series in unstable rivers is challenged by changes in the stage-discharge relation after floods. Then, the field hydrologist must develop a new stage-discharge rating curve using new calibration data but also using some information from previous calibration data and previous rating curves. The process includes a large amount of informal expert knowledge and hydraulic assumptions seldom made explicit. This paper develops a stage-period-discharge (SPD) model based on the physical interpretation of changes in the stage-discharge relation across a series of stability periods defined by known dates and times. Using simple hydraulic equations, the user provides prior knowledge on the controls, their static and varying parameters, and their possible changes. As a single model is used for all the periods, the estimation of all rating curves can be performed in one go: All gaugings hence provide information to estimate the static parameters and the varying parameters for the relevant periods. Bayesian inference is used, providing a natural way to include prior knowledge and to quantify uncertainty. The generality and some key properties of the method are demonstrated through application to two hydrometric stations, differing in hydraulic configuration and in number and type of changes. Specific experiments demonstrate the ability of the SPD model to transfer information across periods. Consequently, rating curves are more precisely estimated than by separately estimating them for each period. The SPD model provides a hydraulically based, transparent, and user-friendly approach to replace manual shift corrections traditionally applied in operational practice, with a quantification of uncertainties.


领域资源环境
收录类别SCI-E
WOS记录号WOS:000468597900018
WOS关键词BAYESIAN-ANALYSIS ; UNCERTAINTY ; RIVER ; FREQUENCY ; SEGMENTATION ; FRAMEWORK ; STATIONS ; RAINFALL ; MODEL
WOS类目Environmental Sciences ; Limnology ; Water Resources
WOS研究方向Environmental Sciences & Ecology ; Marine & Freshwater Biology ; Water Resources
引用统计
文献类型期刊论文
条目标识符http://119.78.100.173/C666/handle/2XK7JSWQ/182223
专题资源环境科学
作者单位1.Irstea, UR RiverLy, Villeurbanne, France;
2.Stockholm Univ, Dept Phys Geog, Stockholm, Sweden
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GB/T 7714
Mansanarez, V,Renard, B.,Le Coz, J.,et al. Shift Happens! Adjusting Stage-Discharge Rating Curves to Morphological Changes at Known Times[J]. WATER RESOURCES RESEARCH,2019,55(4):2876-2899.
APA Mansanarez, V,Renard, B.,Le Coz, J.,Lang, M.,&Darienzo, M..(2019).Shift Happens! Adjusting Stage-Discharge Rating Curves to Morphological Changes at Known Times.WATER RESOURCES RESEARCH,55(4),2876-2899.
MLA Mansanarez, V,et al."Shift Happens! Adjusting Stage-Discharge Rating Curves to Morphological Changes at Known Times".WATER RESOURCES RESEARCH 55.4(2019):2876-2899.
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