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Consistency assessment of rating curve data in various locations using Bidirectional Reach (BReach)

(2017) HYDROLOGY AND EARTH SYSTEM SCIENCES. 21(10). p.5315-5337
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Abstract
When estimating discharges through rating curves, temporal data consistency is a critical issue. In this research, consistency in stage-discharge data is investigated using a methodology called Bidirectional Reach (BReach), which departs from a (in operational hydrology) commonly used definition of consistency. A period is considered to be consistent if no consecutive and systematic deviations from a current situation occur that exceed observational uncertainty. Therefore, the capability of a rating curve model to describe a subset of the (chronologically sorted) data is assessed in each observation by indicating the outermost data points for which the rating curve model behaves satisfactorily. These points are called the maximum left or right reach, depending on the direction of the investigation. This temporal reach should not be confused with a spatial reach (indicating a part of a river). Changes in these reaches throughout the data series indicate possible changes in data consistency and if not resolved could introduce additional errors and biases. In this research, various measurement stations in the UK, New Zealand and Belgium are selected based on their significant historical ratings information and their specific characteristics related to data consistency. For each country, regional information is maximally used to estimate observational uncertainty. Based on this uncertainty, a BReach analysis is performed and, subsequently, results are validated against available knowledge about the history and behavior of the site. For all investigated cases, the methodology provides results that appear to be consistent with this knowledge of historical changes and thus facilitates a reliable assessment of (in) consistent periods in stage-discharge measurements. This assessment is not only useful for the analysis and determination of discharge time series, but also to enhance applications based on these data (e.g., by informing hydrological and hydraulic model evaluation design about consistent time periods to analyze).
Keywords
DISCHARGE, UNCERTAINTIES, RIVER, IDENTIFICATION, SENSITIVITY, CALIBRATION, STATIONS, MODEL

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MLA
Van Eerdenbrugh, Katrien et al. “Consistency Assessment of Rating Curve Data in Various Locations Using Bidirectional Reach (BReach).” HYDROLOGY AND EARTH SYSTEM SCIENCES 21.10 (2017): 5315–5337. Print.
APA
Van Eerdenbrugh, K., Van Hoey, S., Coxon, G., Freer, J., & Verhoest, N. (2017). Consistency assessment of rating curve data in various locations using Bidirectional Reach (BReach). HYDROLOGY AND EARTH SYSTEM SCIENCES, 21(10), 5315–5337.
Chicago author-date
Van Eerdenbrugh, Katrien, Stijn Van Hoey, Gemma Coxon, Jim Freer, and Niko Verhoest. 2017. “Consistency Assessment of Rating Curve Data in Various Locations Using Bidirectional Reach (BReach).” Hydrology and Earth System Sciences 21 (10): 5315–5337.
Chicago author-date (all authors)
Van Eerdenbrugh, Katrien, Stijn Van Hoey, Gemma Coxon, Jim Freer, and Niko Verhoest. 2017. “Consistency Assessment of Rating Curve Data in Various Locations Using Bidirectional Reach (BReach).” Hydrology and Earth System Sciences 21 (10): 5315–5337.
Vancouver
1.
Van Eerdenbrugh K, Van Hoey S, Coxon G, Freer J, Verhoest N. Consistency assessment of rating curve data in various locations using Bidirectional Reach (BReach). HYDROLOGY AND EARTH SYSTEM SCIENCES. 2017;21(10):5315–37.
IEEE
[1]
K. Van Eerdenbrugh, S. Van Hoey, G. Coxon, J. Freer, and N. Verhoest, “Consistency assessment of rating curve data in various locations using Bidirectional Reach (BReach),” HYDROLOGY AND EARTH SYSTEM SCIENCES, vol. 21, no. 10, pp. 5315–5337, 2017.
@article{8551454,
  abstract     = {When estimating discharges through rating curves, temporal data consistency is a critical issue. In this research, consistency in stage-discharge data is investigated using a methodology called Bidirectional Reach (BReach), which departs from a (in operational hydrology) commonly used definition of consistency. A period is considered to be consistent if no consecutive and systematic deviations from a current situation occur that exceed observational uncertainty. Therefore, the capability of a rating curve model to describe a subset of the (chronologically sorted) data is assessed in each observation by indicating the outermost data points for which the rating curve model behaves satisfactorily. These points are called the maximum left or right reach, depending on the direction of the investigation. This temporal reach should not be confused with a spatial reach (indicating a part of a river). Changes in these reaches throughout the data series indicate possible changes in data consistency and if not resolved could introduce additional errors and biases. In this research, various measurement stations in the UK, New Zealand and Belgium are selected based on their significant historical ratings information and their specific characteristics related to data consistency. For each country, regional information is maximally used to estimate observational uncertainty. Based on this uncertainty, a BReach analysis is performed and, subsequently, results are validated against available knowledge about the history and behavior of the site. For all investigated cases, the methodology provides results that appear to be consistent with this knowledge of historical changes and thus facilitates a reliable assessment of (in) consistent periods in stage-discharge measurements. This assessment is not only useful for the analysis and determination of discharge time series, but also to enhance applications based on these data (e.g., by informing hydrological and hydraulic model evaluation design about consistent time periods to analyze).},
  author       = {Van Eerdenbrugh, Katrien and Van Hoey, Stijn and Coxon, Gemma and Freer, Jim and Verhoest, Niko},
  issn         = {1027-5606},
  journal      = {HYDROLOGY AND EARTH SYSTEM SCIENCES},
  keywords     = {DISCHARGE,UNCERTAINTIES,RIVER,IDENTIFICATION,SENSITIVITY,CALIBRATION,STATIONS,MODEL},
  language     = {eng},
  number       = {10},
  pages        = {5315--5337},
  title        = {Consistency assessment of rating curve data in various locations using Bidirectional Reach (BReach)},
  url          = {http://dx.doi.org/10.5194/hess-21-5315-2017},
  volume       = {21},
  year         = {2017},
}

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