Assessing the Impacts of Pre-monsoon Extreme Weather Events and Associated Factors on Rice Yield: A Study on Tahirpur Upazila of Sunamganj District, Bangladesh

Abstract

Bangladesh, being a geographically vulnerable country experiences a variety of severe weather phenomena and most of them occur during the pre-monsoon season (March-May). This study investigates the occurrence of the pre-monsoon extreme weather events in Sunamganj and their impacts on the rice yield. Sunamganj is one of most vulnerable areas of Bangladesh that experiences almost all types of extreme weather phenomena during pre-monsoon and therefore the assessment of the effect of these hazards on rice yield have been conducted in Dakshin Sreepur union, Tahirpur upazila, Sunamganj. This study has been accomplished by blending the findings of climate data analysis with field investigation. About 13 extreme climate indices related to temperature and rainfall created by the Expert Team on Climate Change Detection Indices (ETCCDI) were considered to evaluate the correlation between rice yield and extreme weather events in the particular region. The correlation shows that extreme events are not the only factor influencing the rice yields; rather, a few related factors such as socio-economic context, physiographic settings, river bed siltation, construction and management of dams are also affecting the rice production in the study area. As a result, the solutions derived from farmers are important in reducing the detrimental impact of extreme events on rice yield for effective food production. The Dhaka University Journal of Earth and Environmental Sciences, Vol. 11(1), 2022: 111-130

Comprehensive Assessment of the Genotype‐Environment Interaction and Yield Stability of Boro Rice Genotypes under Four Environments in Bangladesh Using AMMI Analysis

“…Akter et al [ 24 ], Sharifi et al [ 25 ], Islam et al [ 23 ], and Kanfany et al [ 26 ] also noted that significant variation in GEI implied the presence of multiple mega-environments, where various genotypes excel in yield performance. Given the diverse grain yield performances of different genotypes across environments, mean comparison analysis sufficed for identifying genotype differences [ 11 , 27 ]. Comparing means and ranges across environments provides insights into environmental suitability for trait expression.…”

“…Until February 27, farmers had brought 27,07,572 hectares (76.61% of the target) under Boro cultivation. The average Boro rice yield in Bangladesh varies depending on a number of variables, including the rice genotypes, the region, the season, inefficient nutrient management, disease, stresses such as drought, flood, salinity, extreme temperature, low soil fertility, and agricultural practices used, all of which reduce rice yields and increase their variability as well as yield stability in Bangladesh [ 11 ]. Therefore, extensive Boro rice cultivation is being made possible by improving crop management, increasing the application of appropriate fertilizer, pest management, and yield stability over a genotype of environments.…”

Identification of Flood Extent Area and Flood Risk Zone Using Geospatial Technologies in Tahirpur Upazila

“…The total area of Tahirpur Upazila in the Sunamganj district of Bangladesh is approximately 31,533 hectares, according to the Bangladesh Bureau of Statistics (2011). The distance between Sylhet and the Sunamganj region is 69 kilometers, while Tahirpur upazila is 40 kilometers from the Town in the Sunamganj area [7]. This upazila has 300.04 kilometers of streets, ve streams, 14 trenches, and 129 kilometers of a dike.…”

“…On the banks of the Tanguar Haor, one of Bangladesh's signi cant wetlands and a primary determinant of aquatic and sh resources for the population sits Tahirpur Upazila. The area is also distinguished by many minor streams, waterways, and beels (ponds) that support the region's agriculture and shing industries [7].…”