Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1029/2020WR028607 |
Detection of Stage‐Discharge Rating Shifts Using Gaugings: A Recursive Segmentation Procedure Accounting for Observational and Model Uncertainties | |
Matteo Darienzo; Benjamin Renard; Jé; rô; me Le Coz; Michel Lang | |
2021-03-23 | |
发表期刊 | Water Resources Research
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出版年 | 2021 |
英文摘要 | The stage‐discharge rating curve is subject at many hydrometric stations to sudden changes (shifts) typically caused by morphogenic floods. We propose an original method for estimating shift times using the stage‐discharge observations, also known as gaugings. This method is based on a recursive segmentation procedure that accounts for both gaugings and rating curve uncertainties through a Bayesian framework. It starts with the estimation of a baseline rating curve using all available gaugings. Then it computes the residuals between the gaugings and this rating curve with uncertainties. It proceeds with the segmentation of the time series of residuals through a multi change point Bayesian estimation accounting for residuals uncertainties. Once a first set of shift times is identified, the same procedure is recursively applied to each sub‐period through a “top‐down” approach searching for all effective shifts. The proposed method is illustrated using the Ardèche River at Meyras in France (a typical hydrometric site subject to river bed degradation) and evaluated using several synthetic data‐sets for which the true shift times are known. The applications confirm the added value of the recursive segmentation compared with a “single‐pass” approach and highlight the importance of properly accounting for uncertainties in the segmented data. The recursive procedure effectively disentangles rating changes from observational and rating curve uncertainties. |
领域 | 资源环境 |
URL | 查看原文 |
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/320940 |
专题 | 资源环境科学 |
推荐引用方式 GB/T 7714 | Matteo Darienzo,Benjamin Renard,Jé,等. Detection of Stage‐Discharge Rating Shifts Using Gaugings: A Recursive Segmentation Procedure Accounting for Observational and Model Uncertainties[J]. Water Resources Research,2021. |
APA | Matteo Darienzo,Benjamin Renard,Jé,rô,me Le Coz,&Michel Lang.(2021).Detection of Stage‐Discharge Rating Shifts Using Gaugings: A Recursive Segmentation Procedure Accounting for Observational and Model Uncertainties.Water Resources Research. |
MLA | Matteo Darienzo,et al."Detection of Stage‐Discharge Rating Shifts Using Gaugings: A Recursive Segmentation Procedure Accounting for Observational and Model Uncertainties".Water Resources Research (2021). |
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