https://repository.auw.edu.bd/handle/123456789/800 Wed, 10 Jun 2026 10:35:26 GMT 2026-06-10T10:35:26Z https://repository.auw.edu.bd/handle/123456789/973 Assessing the influence of human settlements on the plant diversity in wetlands of Phobji and Gangtey, Bhutan Nazim Uddin, Sayed Mohammad Plant diversity in the wetlands of Phobji and Gangtey represents an important aspect of the overall wetland ecosystem. However, over the years, the increasing trend in population has initiated the building of many infrastructures and accommodations which lie at close proximity to the core wetland area. The plant diversity in human settled area and core undisturbed area was studied, with an objective to assess the influence of human settlement on the plant diversity. A belt transect method was used for the purpose of vegetation survey and Shannon Wiener diversity was calculated using the relative dominance. Plants were analyzed for their diversity, richness, dominance and invasive nature. Additionally, soil and water parameters were also tested to see the current situation of the pH and nutrient levels. A total of 136 species belonging to 39 families was identified in both the areas. The overall diversity index and species richness was found to be higher in the undisturbed areas. Soil analysis did not show much of a difference in physical and chemical parameters except for a slight difference in potassium content. Similarly, water parameters did not show much difference but only showed variation in calcium content. The findings of the study indicated towards the increasing influence of human settlement in the wetland. Wed, 01 Jan 2020 00:00:00 GMT https://repository.auw.edu.bd/handle/123456789/973 2020-01-01T00:00:00Z https://repository.auw.edu.bd/handle/123456789/972 Exploring challenges in safe water availability and accessibility in preventing COVID-19 in refugee settlements: A brief review Nazim Uddin, Sayed Mohammad Wed, 01 Jan 2020 00:00:00 GMT https://repository.auw.edu.bd/handle/123456789/972 2020-01-01T00:00:00Z https://repository.auw.edu.bd/handle/123456789/971 Investigating the presence of enteric bacteria and their antibiotic resistance in drinking water samples of slum households in Port City Chattogram, Bangladesh Nazim Uddin, Sayed Mohammad Globally, unsafe water supplies due to contamination with fecal coliforms are major issues in urban slums. To determine the presence of microbial risk, water samples were collected from three slums in the port city Chattogram and the MPN method was used to test for the presence of fecal coliform. All of the samples tested positive by the MPN test. The highest count was 1,100 MPN/100 ml and the lowest count was 7.2 MPN/100 ml. Water stored in containers was prone to being more contaminated than water collected directly from the source. To understand the antibiotic resistivity of the coliform bacteria isolated from the water samples, antibiotic susceptibility was evaluated using the Kirby-Bauer disc method for six antibiotics. All the bacteria were 100% resistant to Penicillin-G and Ampicillin, and 91.7% showed resistance to Amoxicillin and Mecillinam. An integrated approach to water, sanitation, and hygiene education must be undertaken when providing sustainable interventions in slums. Wed, 01 Jan 2020 00:00:00 GMT https://repository.auw.edu.bd/handle/123456789/971 2020-01-01T00:00:00Z https://repository.auw.edu.bd/handle/123456789/970 Drinking Water Security Challenges in Rohingya Refugee Camps of Cox’s Bazar, Bangladesh Nazim Uddin, Sayed Mohammad About a million Rohingyas have fled due to the ethnic cleansing in Myanmar and sought refuge in Bangladesh. The refugees are located in temporary settlements on hilly areas of Cox’s Bazar with inadequate water and sanitation facilities, giving rise to diseases such as cholera, typhoid, and diarrhea. This exploratory study reports drinking water security challenges in two Rohingya refugee camps within the larger camp network—Camp 2 and the recently-built Camp 4 Extension (Camp 4Ext)—to discover the key everyday issues refugees are facing related to drinking water. Both qualitative and quantitative methods have been applied to determining whether contamination is occurring during the collection, transportation, and storage of drinking water by comparing the water quality at the source with that in storage. The results show that Camp 4Ext is more suited for living in several respects compared with the other camps, attributable to significantly better planning during its construction: there is a lower prevalence of diseases, lower water collection times, higher standards of sanitation, and better access to water sources. This study’s outcomes will help camp authorities and the various agencies working there to provide sustainable water and sanitation interventions to improve the wellness of the Rohingya refugees in Cox’s Bazar. The outcomes will also provide useful information and strategic direction to the global scientific and development communities who are working in refugee camps in other parts of the world, to tackle water security challenges. Wed, 01 Jan 2020 00:00:00 GMT https://repository.auw.edu.bd/handle/123456789/970 2020-01-01T00:00:00Z