রাইয়ান ইসলাম | University of Barisal (original) (raw)

Papers by রাইয়ান ইসলাম

Environmental and Earth Sciences Research Journal

The rapid industrialization of cities poses significant challenges to sustainable development, pa... more The rapid industrialization of cities poses significant challenges to sustainable development, particularly environmental degradation. The Sustainable Development Goals (SDGs) recognize the urgent need to address this issue in industrialized regions. A case study approach obtained valuable insights into Dhaka's green spaces and their implications for SDG 11 and 15. This study explores the decrease in green cover in Dhaka City attributed to unplanned industrialization and examines its relationship with the degradation of air quality during the period spanning from 1991 to 2021. The image classification procedure yielded overall accuracy rates ranging from 0.82 to 0.90. The findings reveal a significant decline of 16% in healthy vegetation and 8.98% in shrubs/grasslands, possibly due to a 34.7% increase in built-up/bare lands. AQI increased from 124 in 1996 to 172 in 2018 in Dhaka but decreased to 163 in 2021, probably due to the COVID-19 pandemic. Unplanned industrialization has led to reduced green cover and increased air pollution in the city. The study emphasizes the utility of NDVI (Normalized Difference Vegetation Index) measurements to address these challenges and achieve the SDGs. These measurements provide valuable information for decision-making and policy formulation, promoting the creation of green environments.

International journal of climate research, Aug 29, 2023

Climate change Climatology Dhaka city Mann-Kendall trend method Sen's slope estimator Trend analy... more Climate change Climatology Dhaka city Mann-Kendall trend method Sen's slope estimator Trend analysis Urban climate. This study presents a comprehensive assessment of the historical climatology of Dhaka city over a period of fifty years (1971-2021), utilizing five distinct climate parameters: Skin Temperature, Air Temperature, Rainfall, Wind Speed, and Humidity. The study employed various statistical methods, such as Linear regression, the Mann-Kendall test model, and Sen's slope estimator method, to examine the significant patterns in climate data and quantify the degree of fluctuations in the variables. The results of the Mann-Kendall Test provided evidence that each parameter's values displayed a statistically significant trend. The Sen's Slope estimator revealed a declining trend in the monthly mean value of all climate parameters except for wind speed and humidity. The annual average Skin and Air Temperature in Dhaka City increased at a rate of 0.033°C and 0.065°C respectively over the study period; as a result, the average annual Rainfall and Humidity showed an increasing tendency, which was 1.225 mm and 0.086% respectively. The Monsoon period demonstrated the highest rainfall and humidity levels, while the winter season demonstrated the lowest levels of these parameters. The trend of Wind Speed has exhibited a decrease at a rate of 0.032 m/s over the past five decades. A critical analysis evaluates the trends and patterns observed in the data. This research attempts to improve understanding of the components that have influenced the climate of Dhaka City by evaluating historical data. Contribution/Originality: This research stands out with its broader coverage of climate parameters compared to previous studies, employing widely accepted Mann-Kendall and Sen's slope methods for trend analysis and utilizing the latest climate data, enhancing the understanding of Dhaka City's climatology over the past fifty years. 1. INTRODUCTION The climate is a crucial element of the natural environment that has a significant impact on human life, affecting various aspects such as the production of food, water resources, health, and the welfare of society. Comprehending the attributes of climate and its fluctuations is crucial for promoting sustainable development and mitigating disaster risks. Since the 1950s, various research endeavors have been undertaken to detect climate change, demonstrating that significant quantities of ice have melted away and the sea level has increased due to the warming of the earth's atmosphere and the ocean [1]. The climatological history encompasses the documentation of previous climate alterations, comprising anthropogenic and natural variables that have impacted the Earth's climate. The planet's climate has changed over time due to natural phenomena, including volcanic activity, solar radiation, and alterations in the planet's orbital

Environmental and Earth Sciences Research Journal

The rapid industrialization of cities poses significant challenges to sustainable development, pa... more The rapid industrialization of cities poses significant challenges to sustainable development, particularly environmental degradation. The Sustainable Development Goals (SDGs) recognize the urgent need to address this issue in industrialized regions. A case study approach obtained valuable insights into Dhaka's green spaces and their implications for SDG 11 and 15. This study explores the decrease in green cover in Dhaka City attributed to unplanned industrialization and examines its relationship with the degradation of air quality during the period spanning from 1991 to 2021. The image classification procedure yielded overall accuracy rates ranging from 0.82 to 0.90. The findings reveal a significant decline of 16% in healthy vegetation and 8.98% in shrubs/grasslands, possibly due to a 34.7% increase in built-up/bare lands. AQI increased from 124 in 1996 to 172 in 2018 in Dhaka but decreased to 163 in 2021, probably due to the COVID-19 pandemic. Unplanned industrialization has led to reduced green cover and increased air pollution in the city. The study emphasizes the utility of NDVI (Normalized Difference Vegetation Index) measurements to address these challenges and achieve the SDGs. These measurements provide valuable information for decision-making and policy formulation, promoting the creation of green environments.

International journal of climate research, Aug 29, 2023

Climate change Climatology Dhaka city Mann-Kendall trend method Sen's slope estimator Trend analy... more Climate change Climatology Dhaka city Mann-Kendall trend method Sen's slope estimator Trend analysis Urban climate. This study presents a comprehensive assessment of the historical climatology of Dhaka city over a period of fifty years (1971-2021), utilizing five distinct climate parameters: Skin Temperature, Air Temperature, Rainfall, Wind Speed, and Humidity. The study employed various statistical methods, such as Linear regression, the Mann-Kendall test model, and Sen's slope estimator method, to examine the significant patterns in climate data and quantify the degree of fluctuations in the variables. The results of the Mann-Kendall Test provided evidence that each parameter's values displayed a statistically significant trend. The Sen's Slope estimator revealed a declining trend in the monthly mean value of all climate parameters except for wind speed and humidity. The annual average Skin and Air Temperature in Dhaka City increased at a rate of 0.033°C and 0.065°C respectively over the study period; as a result, the average annual Rainfall and Humidity showed an increasing tendency, which was 1.225 mm and 0.086% respectively. The Monsoon period demonstrated the highest rainfall and humidity levels, while the winter season demonstrated the lowest levels of these parameters. The trend of Wind Speed has exhibited a decrease at a rate of 0.032 m/s over the past five decades. A critical analysis evaluates the trends and patterns observed in the data. This research attempts to improve understanding of the components that have influenced the climate of Dhaka City by evaluating historical data. Contribution/Originality: This research stands out with its broader coverage of climate parameters compared to previous studies, employing widely accepted Mann-Kendall and Sen's slope methods for trend analysis and utilizing the latest climate data, enhancing the understanding of Dhaka City's climatology over the past fifty years. 1. INTRODUCTION The climate is a crucial element of the natural environment that has a significant impact on human life, affecting various aspects such as the production of food, water resources, health, and the welfare of society. Comprehending the attributes of climate and its fluctuations is crucial for promoting sustainable development and mitigating disaster risks. Since the 1950s, various research endeavors have been undertaken to detect climate change, demonstrating that significant quantities of ice have melted away and the sea level has increased due to the warming of the earth's atmosphere and the ocean [1]. The climatological history encompasses the documentation of previous climate alterations, comprising anthropogenic and natural variables that have impacted the Earth's climate. The planet's climate has changed over time due to natural phenomena, including volcanic activity, solar radiation, and alterations in the planet's orbital