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Theoretical and Applied Climatology

, Volume 129, Issue 3–4, pp 995–1001 | Cite as

Rainfall variability and seasonality in northern Bangladesh

  • Sheikh Hefzul BariEmail author
  • Md. Manjurul Hussain
  • Noor-E-Ashmaul Husna
Original Paper

Abstract

This paper aimed at the analysis of rainfall seasonality and variability for the northern part of South-Asian country, Bangladesh. The coefficient of variability was used to determine the variability of rainfall. While rainfall seasonality index (SI ) and mean individual seasonality index (\( \overline{SI_i} \)) were used to identify seasonal contrast. We also applied Mann-Kendall trend test and sequential Mann-Kendall test to determine the trend in seasonality. The lowest variability was found for monsoon among the four seasons whereas winter has the highest variability. Observed variability has a decreasing tendency from the northwest region towards the northeast region. The mean individual seasonality index (0.815378 to 0.977228) indicates that rainfall in Bangladesh is “markedly seasonal with a long dry season.” It was found that the length of the dry period is lower at the northeastern part of northern Bangladesh. Trend analysis results show no significant change in the seasonality of rainfall in this region. Regression analysis of \( \overline{SI_i} \) and SI, and longitude and mean individual seasonality index show a significant linear correlation for this area.

Keywords

Monsoon Rainfall Rainfall Seasonality Rainfall Variability Rainfall Time Series Seasonality Index 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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Copyright information

© Springer-Verlag Wien 2016

Authors and Affiliations

  • Sheikh Hefzul Bari
    • 1
    Email author
  • Md. Manjurul Hussain
    • 2
  • Noor-E-Ashmaul Husna
    • 2
  1. 1.Department of Civil EngineeringLeading UniversitySylhetBangladesh
  2. 2.Institute of Water and Flood ManagementBangladesh University of Engineering and TechnologyDhakaBangladesh

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