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Water 2018, 10(9), 1183; https://doi.org/10.3390/w10091183

A Method for Detecting Abrupt Change of Sediment Discharge in the Loess Plateau, China

College of Hydrology and Water Resources, Hohai University, Nanjing 210098, China
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Received: 12 August 2018 / Revised: 30 August 2018 / Accepted: 1 September 2018 / Published: 4 September 2018
(This article belongs to the Section Hydrology)
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Abstract

In recent decades, the streamflow and sediment of the Yellow River has decreased sharply, especially the sediment discharge. The factors that lead to this phenomenon have become a widely concerned problem of the whole society. The analysis of abrupt change points of hydrological series is the key to divide datum period, so it is an important work in the research of streamflow and sediment reduction cause. So far, many methods have been proposed to detect abrupt change. However, most methods have great uncertainty due to the deficiencies of irrational structure of test statistics, ideal hypothesis or subjectivity. In this paper, a new method called moving average difference method for abrupt change points detection is proposed. It is proved to be effective through comparison with four commonly used methods via both synthetic series and real data case study. The results show that the proposed method has four distinct advantages: (1) The test statistic structure of the method has physical significance and is intuitive to understand; (2) It is more accurate in abrupt change detection; (3) It can detect all of the abrupt change points at one time; (4) It can detect the abrupt changes and calculate the corresponding mutation intensity simultaneously. View Full-Text
Keywords: moving average difference method; wavelet analysis; abrupt change; the Yellow River; sediment discharge moving average difference method; wavelet analysis; abrupt change; the Yellow River; sediment discharge
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).
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Shen, D.; Bao, W.; Ni, P. A Method for Detecting Abrupt Change of Sediment Discharge in the Loess Plateau, China. Water 2018, 10, 1183.

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