Bangladesh; GIS; Meteorological drought; Rainfall data; Spatial analysis; SPI

Al‐Mamun, Abdullah; Rahman, Md. Niaz Farhat; Aziz, Md. Abdullah; Qayum, Md. Abdul; Hossain, Md. Ismail; Nihad, Sheikh Arafat Islam; Kabir, Md. Shahjahan

doi:10.4172/2157-7617.1000457

Cited by 12 publications

(6 citation statements)

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“…A literature review suggests that droughts in Bangladesh have usually been investigated in terms of the season and year of their occurrence. Most of the studies have characterized the drought events in terms of severity and frequency; however, very few studies have considered the areal extent of drought [19,33]. For example, Alamgir et al [4] investigated meteorological drought for different cropping seasons of Bangladesh using SPI indices; the study revealed the variation in the spatial characteristics of droughts corresponding to different seasons.…”

Section: Introductionmentioning

confidence: 99%

Evaluating the Spatiotemporal Characteristics of Agricultural Drought in Bangladesh Using Effective Drought Index

Kamruzzaman

Hwang

Cho³

et al. 2019

Water

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This study aims to assess the spatiotemporal characteristics of agricultural droughts in Bangladesh during 1981–2015 using the Effective Drought Index (EDI). Monthly precipitation data for 36 years (1980–2015) obtained from 27 metrological stations, were used in this study. The EDI performance was evaluated for four sub-regions over the country through comparisons with historical drought records identified by regional analysis. Analysis at a regional level showed that EDI could reasonably detect the drought years/events during the study period. The study also presented that the overall drought severity had increased during the past 35 years. The characteristics (severity and duration) of drought were also analyzed in terms of the spatiotemporal evolution of the frequency of drought events. It was found that the western and central regions of the country are comparatively more vulnerable to drought. Moreover, the southwestern region is more prone to extreme drought, whereas the central region is more prone to severe droughts. Besides, the central region was more prone to extra-long-term droughts, while the coastal areas in the southwestern as well as in the central and north-western regions were more prone to long-term droughts. The frequency of droughts in all categories significantly increased during the last quinquennial period (2011 to 2015). The seasonal analysis showed that the north-western areas were prone to extreme droughts during the Kharif (wet) and Rabi (dry) seasons. The central and northern regions were affected by recurring severe droughts in all cropping seasons. Further, the most significant increasing trend of the drought-affected area was observed within the central region, especially during the pre-monsoon (March–May) season. The results of this study can aid policymakers in the development of drought mitigation strategies in the future.

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Section: Introductionmentioning

confidence: 99%

Evaluating the Spatiotemporal Characteristics of Agricultural Drought in Bangladesh Using Effective Drought Index

Kamruzzaman

Hwang

Cho³

et al. 2019

Water

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“…It has been assumed that, in 2050, the population of Bangladesh will be 215.4 million, when 44.6 MT of clean rice will be required [ 3 ]. Climate change and the emergence of different biotic and abiotic stresses are threatening rice production in the world including Bangladesh [ 1 , 4 , 5 ]. To ensure the basic food demand of the burgeoning population of Bangladesh, hybrid rice could be a viable solution to increase rice production with a 15–20% yield advantage compared to inbred varieties [ 6 , 7 ].…”

Section: Introductionmentioning

confidence: 99%

Pyramiding of bacterial blight resistance genes into promising restorer BRRI31R line through marker-assisted backcross breeding and evaluation of agro-morphological and physiochemical characteristics of developed resistant restorer lines

Akter,

Hassan,

Nihad

et al. 2024

PLoS ONE

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BRRI31R is one of the Bangladesh’s most promising restorer lines due to its abundant pollen producing capacity, strong restoring ability, good combining ability, high outcrossing rate and genetically diverse from cytoplasmic male sterile (CMS) line. But the drawback of this line is that it is highly susceptible to bacterial blight (BB) disease of rice caused by Xanthomonas oryzae pv. oryzae. The present study highlighted the pyramiding of effective BB resistance genes (xa5, xa13 and Xa21) into the background of BRRI31R, through marker–assisted backcrossing (MABC). Backcross progenies were confirmed and advanced based on the foreground selection of target genes. Pyramided lines were used for pathogenicity test against five Bangladeshi Xanthomonas oryzae (BXo) races (BXo93, BXo220, BXo822, BXo826, BXo887) and confirmed the dominant fertility restore genes, Rf3 and Rf4 and further validated against SNP markers for more confirmation of target resistance genes. All pyramided restorer lines consisted of Xa4 (in built), xa5, xa13, Xa21, and Chalk5 with two fertility restorer genes, Rf3, Rf4. and these restorer lines showed intermediate amylose content (<25%). Restorer lines BRRI31R-MASP3 and BRRI31R-MASP4 showed high levels of resistance against five virulent BXo races and SNP genotyping revealed that these lines also contained a blast resistance gene Pita races. Gene pyramided restorer lines, BRRI31R-MASP3 and BRRI31R-MASP4 can directly be used as a male parent for the development of new BB resistant hybrid rice variety or could be used as a replacement of restorer line of BRRI hybrid dhan5 and 7 to enhance the quality of hybrid seeds as well as rice production in Bangladesh.

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“…Moreover, the crucial role of environmental factors, particularly rainfall, in shaping agricultural productivity has been widely recognized (Amare et al, 2018). Notably, the evolving rainfall patterns globally and regionally due to climate change have profoundly affected Bangladesh (Hulme and Viner, 1998;Dore, 2005;Kayano and Sanságolo, 2009;Gemmer et al, 2011), leading to unprecedented dry and wet periods over the last three and a half decades (Shahid and Behrawan, 2008;Al Mamun et al, 2018). These fluctuations have resulted in adverse consequences, for example, in 1994-1995, drought reduced rice and wheat production by 3.5 × 10 6 MT (Habiba et al, 2011), and heavy rainfall during 2007 caused a severe flood that affected more than 9 million people in the country.…”

Section: Introductionmentioning

confidence: 99%

Spatio-temporal variability of climatic variables and its impacts on rice yield in Bangladesh

Al Mamun,

Nihad,

Sarkar

et al. 2023

Front. Sustain. Food Syst.

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Bangladesh is a significant contributor to the global food basket but is also one of the most vulnerable countries to climate change. Understanding regional climatic variability helps reduce climate risks and ensure food security. This research examined monthly, seasonal, and yearly temperature, rainfall, and relative humidity in Bangladesh using data from 35 meteorological stations from 1970–2020. The study utilized the Mann–Kendall method to evaluate trends and employed Sen’s slope to quantify their magnitude. Additionally, quantile regression was applied to analyze the impact of climatic variables on rice yield. The findings revealed that maximum (Tmax) and minimum (Tmin) temperatures were steadily increasing, with the southwest experiencing a more rapid rise compared to other regions in Bangladesh. Seasonal Tmax and Tmin rose in most parts of Bangladesh, particularly during the monsoon. In most areas, there was a significant (p < 0.05) increase in Tmax from June to September and Tmin in December. The variability of minimum temperature was considerably affected by warming throughout the country. The eastern area had the most significant (p < 0.05) annual rainfall increase rate, while the northern region had the lowest. There was evidence of inter-seasonal rainfall shipment, with post-monsoon rainfall rising compared to monsoon season. The quantile regression showed that the rice yield of Aus (summer) and Aman (wet) seasons were influenced by maximum temperature and relative humidity, whereas the rice yield of the Boro (dry) season was affected by maximum temperature, rainfall, and relative humidity. Across geographical segmentation, the regression analysis indicated a high level of variability in the northern climate. Overall, the intensity of mean temperature increased throughout the country. So, there is a need to develop heat or drought-resistant rice varieties and modernized irrigation facilities to mitigate these climate risks. However, farmers should employ automated weather-based advisory services for sustaining rice productivity and food security.

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Bangladesh; GIS; Meteorological drought; Rainfall data; Spatial analysis; SPI

Cited by 12 publications

References 0 publications

Evaluating the Spatiotemporal Characteristics of Agricultural Drought in Bangladesh Using Effective Drought Index

Evaluating the Spatiotemporal Characteristics of Agricultural Drought in Bangladesh Using Effective Drought Index

Pyramiding of bacterial blight resistance genes into promising restorer BRRI31R line through marker-assisted backcross breeding and evaluation of agro-morphological and physiochemical characteristics of developed resistant restorer lines

Spatio-temporal variability of climatic variables and its impacts on rice yield in Bangladesh

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