Journal
JOURNAL OF THE AMERICAN WATER RESOURCES ASSOCIATION
Volume 51, Issue 3, Pages 794-806Publisher
WILEY-BLACKWELL
DOI: 10.1111/jawr.12276
Keywords
droughts; cropping seasons; standardized precipitation index; geographical information system; Bangladesh
Funding
- Ministry of Higher Education (MOHE)-Malaysia
- Universiti Teknologi Malaysia (UTM) through FRGS [R.J130000.7822.4F541]
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Drought is one of the most frequent natural disasters in Bangladesh which severely affect agro-based economy and people's livelihood in almost every year. Characterization of droughts in a systematic way is therefore critical in order to take necessary actions toward drought mitigation and sustainable development. In this study, standardized precipitation index is used to understand the spatial distribution of meteorological droughts during various climatic seasons such as premonsoon, monsoon, and winter seasons as well as cropping seasons such as Pre-Kharif (March-May), Kharif (May-October), and Rabi (December-February). Rainfall data collected from 29 rainfall gauge stations located in different parts of the country were used for a period of 50years (1961-2010). The study reveals that the spatial characteristics of droughts vary widely according to season. Premonsoon droughts are more frequent in the northwest, monsoon droughts mainly occur in the west and northwest, winter droughts in the west, and the Rabi and Kharif droughts are more frequent in the north andnorthwest of Bangladesh. It is expected that the findings of the study will support drought monitoring and mitigation activities in Bangladesh.
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