Department of Geography & Environment

Coastal Zone (CZ) is one of the significant regions for its dynamic and diverse nature and biodiversity. The Transition of Land cover (LC) driven by extensive, and accelerating process, mainly driven by natural phenomena and anthropogenic activities which make a deleterious effect on the coastal region's fauna and flora, as well as the environmental and ecological systems. LCC (Landcover classification) is a significant issue for environmental managers for sustainable management and Geographic Informatics Systems (GIS) and Remote Sensing (RS) techniques have been shown to have a high probability of recognizing land cover patterns and change detection due to periodic coverage, data integrity, and provision of data in a broad range. Nijhum Dwip is one of Island in the southern coastal area of Bangladesh has gone significant changes over the last several years. This study concerned with Landcover change detection, identification, analysis, and interpretation using GIS and RS data. To address this issue, this research deployed a mixed-method approach with dominant research methods and utilized a time-series of Landsat 8 Thematic Mapper (TM) and Landsat7 Enhanced Thematic Mapper Plus (ETM+) satellite imagery data, covering the time frame within1990 to 2018. Change detection in land-cover was carried out using a workflow consisting of establishing the LULC (Land use Land cover) classification scheme, image data acquisition, scene processing, data analysis, post-processing, and validation. Maximum Likelihood Classification (MLC) utilized to perform image classification based on the 2018 image, and Cross-Correlation Analysis (CCA) used to identify changes between image pairs. The results showed that during the last three decades, three major changes took place. Forest vegetation cover decreased significantly; on the other side, the total land area increases gradually. The deforestation rate is high due to an increase in agricultural use and the number of populations also increased dynamically. Concerning land change and degradation, the study area the mean annual potential land change was high. This study reveals that there is a relationship between LC (Land cover) change and land degradation that land cover type plays an important role in protecting soil from land degradation in coastal areas. Though the area is protected under the conservation act, increase intensive agriculture, settlement and population conversion the forest gradually.

Bangladesh is predominantly an agricultural country, so studying suitable land for crops and landscapes is essential. Substantial or detailed studies, particularly on this aspect of the landscape and crop suitability for different seasons, are limited. In this paper, an attempt has been made to analyze and evaluate the chronological changes in agricultural crop suits and landscapes along the river Titas, Bangladesh. For the study, the Brahmanbaria district was considered as a case study period from 2012 to 2022. Primary data were obtained from 384 Questionnaire surveys and 10 FGDs, whereas secondary data were collected from CEGIS and BBS. Sentinel 2 images were used for mapping and chronological changes in Land Use and Land Cover (LULC). Between the study periods, paddy cultivation declined from 31 to 18% in Rabi, leading to maximum winter vegetation. However, there were no significant changes in the Kharif-I season. Except for paddy farming, which declined from 22% to 18% in Kharif...

Bangladesh is one of the most disaster-prone countries in the world. Among the different natural disasters, flood is the most common disaster in this country. The people of this country have a long history of coping with flood with an undesirable loss and damages. It is conventionally believed that moving supplies, aid and expertise into flood-affected areas offers the best path to effective response and recovery. Continuous large-scale flooding in Bangladesh did not allow to be successful deal with the typical disaster management approach. In this context, the present study has taken an attempt to analyze the role of social capital in flood vulnerability mitigation of Shibalaya Upazila under Manikganj District. By collecting first hand primary data (Sampling, FGD, KII) researchers tend to examine how social capital operated in the lives of 43 families following a flood. Researchers attempt to understand how community utilized their social capital to initially survive and then relocate or rebuild (bonding) were important for immediate support, but bridging and linking social capital offered pathways to longer term survival and wider neighborhood and community revitalization. This paper also discusses how social capital inclusion can strengthen individual and community development following a catastrophic event.

Northeastern piece of Bangladesh particularly Sunamganj, Sylhet and Netrokona Regions are situated in one of the discouraged segment or low-lying region of the nation. The vast majority of the streams in these regions are started from the close-by uneven zone of neighbouring nation India. These waterways are amazingly ostentatious that is portrayed by an abrupt and wide variety in the stream because of over the top precipitation. At the point when substantial precipitation happens in the bumpy district of India, water rapidly moves towards the north-eastern territory of Bangladesh through various streams and trenches. This floodwater conveys the water as well as convey an immense measure of residue begun fundamentally from the slope. Over the time this residue has kept on the waterways and channels bed and has diminished the transport limit pretty much all of the water assets frameworks within the north-eastern zone of Bangladesh. Life there is an alternate condition and the distinctive natural settings with various monetary example. In each catastrophe, we got to exercise for our future advancement. On the off chance that advancement does not think about the size, recurrence and another parameter of the flash flood don't work out. For better learning we have to learn flash flood as an understudy of disaster, it is an open door for us to become familiar with this flash flood and discover the plausible answer for this catastrophe in the North-Eastern part of our country with the harm and misfortune evaluation in a significant factor for learning this phenomenon or extraordinary occasion. For this, it is important to visit the influenced region for gathering information and individual’s observation about the flash flood and get a reasonable diagram of this debacle. For this research, I focused on Tahirpur Upazila of Sunamganj District.

আবহমানকাল ধরে গ্রহন-পরিগ্রহনের দ্বন্দের ভেতর থেকে উঠে আসা আমাদের সংস্কৃতি, আমাদের মানসিক-সামাজিক-অর্থনৈতিক অবস্থা যা আমাদের ব্যাক্তিত্ব বিকাশে সাহায্য করেছে, পাশাপাশি শত শত দ্বন্দের বিচারে ভিরে একটা আদর্শ তৈরি করেছে বা করছে। যদিও তা ধ্রুব নয় তবে নির্দিষ্ট কালে ঐ সময়ে উদ্ভুত আদর্শের উপর মানুষের পক্ষপাত থাকে।