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Analysis of Meteorological Drought Pattern During Different Climatic and Cropping Seasons in Bangladesh

机译：孟加拉国不同气候和作物季节的气象干旱模式分析

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摘要

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.
机译：干旱是孟加拉国最常见的自然灾害之一，几乎每年都会严重影响以农业为基础的经济和民生。因此，以系统的方式描述干旱特征对于为缓解干旱和实现可持续发展采取必要的行动至关重要。在这项研究中，使用标准化的降水指数来了解各种气候季节（如季风，季风和冬季）以及农作物季节（如哈里夫前（3月至5月），哈里夫（5月至10月）和拉比（12月-2月）。从该国不同地区的29个雨量计站收集的降雨数据使用了50年（1961-2010年）。研究表明，干旱的空间特征随季节而变化。西北地区季风干旱更加频繁，季风干旱主要发生在西部和西北部，西部是冬季干旱，而孟加拉国的北部和西北部的拉比和哈里夫干旱更为频繁。预期该研究的结果将支持孟加拉国的干旱监测和减灾活动。

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