Conclusion drought affected areas were experienced by moderate,

Conclusion

This
study provides a broad knowledge about spatial and temporal variations of
meteorological droughts over different regions of Bangladesh during the period
1980-2015. The drought index of the study area was calculated in three
different cropping seasons namely Pre-Kharif, Kharif and Rabi. The most
signi?cant increasing trend of drought area was found in Rabi season and
decreasing trend was found in Kharif season. From the study period, it was
found that all drought affected areas were experienced by moderate, severe and
extreme droughts in several years of three seasons.  In pre-Kharif season, major drought events
were found in  1992, 1995, 2007, 2008, 2012
and 2014. The significant drought conditions were found in Kharif season in 1981,
1985, 1992, 1994, 2006 and 2012 and in Rabi season same condition was found in
1985, 1986, 2005, 2006, 2009, 2010 and 2012. In southern and western regions,
Jessore, Satkhira, Khulna, Bhola, Barisal and its neighborhood areas; from central
regions, Dhaka, Faridpur, Feni, Tangail and its neighborhood areas and from eastern
regions, Chittagong, Rangamati hill areas and most of the northern region were
more vulnerable to meteorological drought. Major finding of this study is Pre-Kharif
and Rabi season were the most vulnerable to meteorological drought which
indicates high seasonal rainfall anomaly in most of the regions of Bangladesh. But
the terminal drought that occurred in Kharif season (T. Aman) was also
responsible for losses of crop yield due to shortage of rainfall. A timely
adequate rain showed an increase in the crop yield. Therefore, it is
indispensable duty to us to take proper crop managements against extreme
conditions of meteorological droughts to increase the crop yield.
Meteorological drought simultaneously affects the agricultural productivity,
deficit of soil moisture, ground water level and socio economic problems in a
drought affected region. So, agricultural planners and irrigation engineers
should take necessary steps to mitigate drought vulnerability based on
agro-climatic conditions of Bangladesh. 

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