Analysis of long-term dependence phenomenon in Benue River flow process and its hypothesis testing

Martins Y. Otache; Zhijia Li; Mohammad Bakir

doi:10.1007/s00343-008-0313-z

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Analysis of long-term dependence phenomenon in Benue River flow process and its hypothesis testing

Updated：2023-05-16

- Analysis of long-term dependence phenomenon in Benue River flow process and its hypothesis testing
- Journal of Oceanology and Limnology Vol. 26, Issue 3, Pages: 313-322(2008)
- Affiliations：
  
  State Key Laboratory of Hydrology-Water Resources & Hydraulic Engineering Hohai University
- Author bio：
- Funds：
- DOI：10.1007/s00343-008-0313-z
  CLC：
- Online First：20 August 2008，
  
  Published：2008
- Accepted：
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Otache, M.Y., Li, Z. & Bakir, M. Analysis of long-term dependence phenomenon in Benue River flow process and its hypothesis testing., Chin. J. Ocean. Limnol. 26, 313–322 (2008). https://doi.org/10.1007/s00343-008-0313-z
DOI：

Otache, M.Y., Li, Z. & Bakir, M. Analysis of long-term dependence phenomenon in Benue River flow process and its hypothesis testing., Chin. J. Ocean. Limnol. 26, 313–322 (2008). https://doi.org/10.1007/s00343-008-0313-z DOI：

摘要

Abstract

In this paper

the long-term dependence phenomenon (the Hurst Effect) which characterizes hydrological and other geophysical times series is studied. The long-term memory is analysed for both daily and monthly streamflow series of the Benue River at Makurdi

Nigeria by using heuristic methods and testing specifically the null hypothesis of short-term memory in the monthly flow series. Results obtained by applying heuristic procedures indicated that there may be the presence of long-term memory component in mean daily flow series but there is no discernible reason to suspect the presence in both average monthly and maximum monthly flow series (extreme event). Hypothesis testing was conducted by using original and modified versions of rescaled range statistic. When the modified rescaled range

which accounts for short-term memory in the series

is used

the null hypothesis is accepted for both the average monthly and maximum monthly flow series

indicating little or no probable presence of long-term memory in the series. An identical conclusion is also arrived at when second null hypothesis for independence of the monthly flow series is tested. Therefore

apart from the mean daily flow series

there is little evidence of long-term dependence in the Benue River streamflow series at Makurdi. However

considering the limited length of data used

the results are inconclusive.

关键词

Keywords

references

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