Pub Date : 2019-09-30DOI: 10.3329/jesnr.v11i1-2.43359
P. Barmon, MS Islam, M. Kabir
The study investigated physicochemical parameters and heavy metal concentrations in water of the Mokesh beel during January to June 2016. Samples were collected from 3 different locations and analyzed in the laboratory of the Department of Environmental Science and Resource Management, MBSTU, Tangail and BINA, Mymensingh. Results showed that EC and TDS were varied from 645-688μS/cm and 541-586mg/l, respectively indicated high ionic concentration, whereas DO of all stations ranged from 4.1-5.5mg/l represents low organic waste, and pH (7.25-7.55) of all stations showed alkaline nature. In case of heavy metal concentration Pb, Cd, Cu, Zn and Cr were within the standard level. The result concludes that the water can be used for different purposes but heavy metals can be accumulated in fish flesh, consequently affect the human health. To maintain the water quality and conserve the aquatic life, proper measures should be taken to prevent pollutants intrusion into the beel. J. Environ. Sci. & Natural Resources, 11(1-2): 1-8 2018
{"title":"Physicochemical Parameters and Heavy Metal Concentration in Water at the Mokesh Beel of Bangladesh","authors":"P. Barmon, MS Islam, M. Kabir","doi":"10.3329/jesnr.v11i1-2.43359","DOIUrl":"https://doi.org/10.3329/jesnr.v11i1-2.43359","url":null,"abstract":"The study investigated physicochemical parameters and heavy metal concentrations in water of the Mokesh beel during January to June 2016. Samples were collected from 3 different locations and analyzed in the laboratory of the Department of Environmental Science and Resource Management, MBSTU, Tangail and BINA, Mymensingh. Results showed that EC and TDS were varied from 645-688μS/cm and 541-586mg/l, respectively indicated high ionic concentration, whereas DO of all stations ranged from 4.1-5.5mg/l represents low organic waste, and pH (7.25-7.55) of all stations showed alkaline nature. In case of heavy metal concentration Pb, Cd, Cu, Zn and Cr were within the standard level. The result concludes that the water can be used for different purposes but heavy metals can be accumulated in fish flesh, consequently affect the human health. To maintain the water quality and conserve the aquatic life, proper measures should be taken to prevent pollutants intrusion into the beel. \u0000J. Environ. Sci. & Natural Resources, 11(1-2): 1-8 2018","PeriodicalId":15768,"journal":{"name":"Journal of Environmental Science and Natural Resources","volume":"94 4 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2019-09-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"83517718","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2019-09-30DOI: 10.3329/jesnr.v11i1-2.43361
Ma Rahman, M. Islam
This study incorporates a detail exploration of drinking water scarcity in the south-western coastal area of Bangladesh. The objectives were to recognize the constraints of potable water supply in the coastal area and to identify the water-scarce area of a coastal community of Bangladesh. Both primary and secondary data have been used to carry out the study. A total of 349 households were selected by using appropriate statistical procedure. ArcGIS has been used for pertinent mapping and calculating the served and unserved (inadequate supply) area of the nearest community water source e.g. pond sand filters or tube-wells. This study found that the root causes i.e. saline water intrusion, reduction of upstream flow, sea level rise, disasters, polder, arsenic contamination, shrimp cultivation in brackish water, excessive use of underground water and lack of appropriate aquifer were highly influential for the disturbance of potable water supply in the coastal area. In addition, it has been showed that about two-third of the settlement areas as well as households fell into the water scarce zone. J. Environ. Sci. & Natural Resources, 11(1-2): 17-25 2018
{"title":"Scarcity of Safe Drinking Water in the South-West Coastal Bangladesh","authors":"Ma Rahman, M. Islam","doi":"10.3329/jesnr.v11i1-2.43361","DOIUrl":"https://doi.org/10.3329/jesnr.v11i1-2.43361","url":null,"abstract":"This study incorporates a detail exploration of drinking water scarcity in the south-western coastal area of Bangladesh. The objectives were to recognize the constraints of potable water supply in the coastal area and to identify the water-scarce area of a coastal community of Bangladesh. Both primary and secondary data have been used to carry out the study. A total of 349 households were selected by using appropriate statistical procedure. ArcGIS has been used for pertinent mapping and calculating the served and unserved (inadequate supply) area of the nearest community water source e.g. pond sand filters or tube-wells. This study found that the root causes i.e. saline water intrusion, reduction of upstream flow, sea level rise, disasters, polder, arsenic contamination, shrimp cultivation in brackish water, excessive use of underground water and lack of appropriate aquifer were highly influential for the disturbance of potable water supply in the coastal area. In addition, it has been showed that about two-third of the settlement areas as well as households fell into the water scarce zone. \u0000J. Environ. Sci. & Natural Resources, 11(1-2): 17-25 2018","PeriodicalId":15768,"journal":{"name":"Journal of Environmental Science and Natural Resources","volume":"76 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2019-09-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"84651392","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2019-09-30DOI: 10.3329/jesnr.v11i1-2.43360
Muhammed Fazlur Rahman, Islam, T. Chowdhury
Nearly one million Rohingya Refugees are living in Cox’s Bazar—a south-eastern district of Bangladesh; among them, more than half a million have fled Myanmar since August 2017. There are always some impacts of refugee settlements on the host environment. Hence, this study has made an initiative to investigate the changes of vegetation covers in four refugee occupied Unions of Teknaf and Ukhia Upazila. Analysing the remotely sensed Landsat imageries using Normalized Difference Vegetation Index method, the spatial extent of sparse vegetation, moderate vegetation, and dense vegetation before and after the occurrence of 2017 Influx have been quantified. The result reveals that nearly 21,000 acres of dense vegetation and more than 1700 acres of moderate vegetation have been reduced within the period of one year in-between 2017 and 2018. On the other hand, during the same period, the refugee sites have been expanded by almost 6000 acres. The main reasons for this drastic reduction of vegetation include the construction of refugee camps by felling the forest and consumption of firewood by refugees from the surrounding forest of their camps. Arrangement of alternative cooking fuel, relocation of refugees, reforestation, and accelerating the repatriation process may reduce the further degradation of vegetation. J. Environ. Sci. & Natural Resources, 11(1-2): 9-16 2018
{"title":"Change of Vegetation Cover at Rohingya Refugee Occupied Areas in Cox’s Bazar District of Bangladesh: Evidence from Remotely Sensed Data","authors":"Muhammed Fazlur Rahman, Islam, T. Chowdhury","doi":"10.3329/jesnr.v11i1-2.43360","DOIUrl":"https://doi.org/10.3329/jesnr.v11i1-2.43360","url":null,"abstract":"Nearly one million Rohingya Refugees are living in Cox’s Bazar—a south-eastern district of Bangladesh; among them, more than half a million have fled Myanmar since August 2017. There are always some impacts of refugee settlements on the host environment. Hence, this study has made an initiative to investigate the changes of vegetation covers in four refugee occupied Unions of Teknaf and Ukhia Upazila. Analysing the remotely sensed Landsat imageries using Normalized Difference Vegetation Index method, the spatial extent of sparse vegetation, moderate vegetation, and dense vegetation before and after the occurrence of 2017 Influx have been quantified. The result reveals that nearly 21,000 acres of dense vegetation and more than 1700 acres of moderate vegetation have been reduced within the period of one year in-between 2017 and 2018. On the other hand, during the same period, the refugee sites have been expanded by almost 6000 acres. The main reasons for this drastic reduction of vegetation include the construction of refugee camps by felling the forest and consumption of firewood by refugees from the surrounding forest of their camps. Arrangement of alternative cooking fuel, relocation of refugees, reforestation, and accelerating the repatriation process may reduce the further degradation of vegetation. \u0000J. Environ. Sci. & Natural Resources, 11(1-2): 9-16 2018","PeriodicalId":15768,"journal":{"name":"Journal of Environmental Science and Natural Resources","volume":"635 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2019-09-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"77027396","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2019-09-30DOI: 10.3329/jesnr.v11i1-2.43366
Islam, M. Akhter, A. Huda, M. Hashem, M. Asad
An experiment was conducted at the Soil Science Field Laboratory of Bangladesh Agricultural University, Mymensingh during Aman season of 2016 to evaluate the effects of deep placement of N fertilizers in the form of USG and NPK briquettes in comparison with PU on nitrogen use efficiency and yield of BRRI dhan49. The soil was silt loam in texture having pH 6.27, organic matter content 1.95% and total N 0.136%. The experiment was laid out in a RCBD with eight treatments and three replications. The PU was applied in three equal splits. The USG and NPK briquettes were deep placed at 10 DAT and the briquettes were placed at 8-10 cm depth between four hills at alternate rows. The maximum grain yield of 5981 kg ha-1 was recorded in T3 which was statistically similar with T2 and T6. The highest straw yield of 6381 kg ha-1 was observed in T3. The lowest grain yield (3265 kg ha-1) and straw yield (4280 kg ha-1) was recorded in T3. The deep placement of USG and NPK briquettes enhanced both the recovery of applied N and N use efficiency in comparison with broadcast application of prilled urea. J. Environ. Sci. & Natural Resources, 11(1-2): 53-58 2018
本试验于2016年Aman季在孟加拉国农业大学Mymensingh土壤科学田间实验室进行，比较了USG和NPK型压块深施氮肥与PU对BRRI dhan49氮素利用效率和产量的影响。土壤质地为粉砂壤土，pH为6.27，有机质含量为1.95%，全氮含量为0.136%。实验在RCBD中进行，有8个处理和3个重复。PU分三等分施用。USG和NPK型煤放置深度为10dat，型煤放置深度为8- 10cm，在4个小山之间隔行放置。T3的最高产量为5981 kg ha-1，与T2和T6相近。T3秸秆产量最高，达6381 kg ha-1。籽粒产量最低(3265 kg hm -1)，秸秆产量最低(4280 kg hm -1)。与喷施相比，深施USG和NPK型煤提高了氮素回收率和氮素利用率。j .包围。科学。与自然资源，11(1-2):53-58 2018
{"title":"Forms and Placement of Nitrogen Fertilizers Influence Nitrogen Use Efficiency and Yield of BRRI Dhan49 under Continuous Flooded Condition","authors":"Islam, M. Akhter, A. Huda, M. Hashem, M. Asad","doi":"10.3329/jesnr.v11i1-2.43366","DOIUrl":"https://doi.org/10.3329/jesnr.v11i1-2.43366","url":null,"abstract":"An experiment was conducted at the Soil Science Field Laboratory of Bangladesh Agricultural University, Mymensingh during Aman season of 2016 to evaluate the effects of deep placement of N fertilizers in the form of USG and NPK briquettes in comparison with PU on nitrogen use efficiency and yield of BRRI dhan49. The soil was silt loam in texture having pH 6.27, organic matter content 1.95% and total N 0.136%. The experiment was laid out in a RCBD with eight treatments and three replications. The PU was applied in three equal splits. The USG and NPK briquettes were deep placed at 10 DAT and the briquettes were placed at 8-10 cm depth between four hills at alternate rows. The maximum grain yield of 5981 kg ha-1 was recorded in T3 which was statistically similar with T2 and T6. The highest straw yield of 6381 kg ha-1 was observed in T3. The lowest grain yield (3265 kg ha-1) and straw yield (4280 kg ha-1) was recorded in T3. The deep placement of USG and NPK briquettes enhanced both the recovery of applied N and N use efficiency in comparison with broadcast application of prilled urea. \u0000J. Environ. Sci. & Natural Resources, 11(1-2): 53-58 2018","PeriodicalId":15768,"journal":{"name":"Journal of Environmental Science and Natural Resources","volume":"192 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2019-09-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"88123194","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2018-11-29DOI: 10.3329/jesnr.v10i2.39015
M. A. Salam, M. Pramanik
Deforestation, degradation, damages, transformation and over exploitation of forests are the common problem in different parts of the world. Timely monitoring and assessment of forest resources may help to address and identify the above mentioned problems and thus proper guidance may be given the forest resources manager for rational planning and management of forests. Apart from the conventional methods of forest monitoring, remote sensing with its unique capability of synoptic viewing, real time and repetitive nature offers a potential tool for monitoring and evaluation of forest resources and hence remote sensing technology has been successfully used in various studies like forest inventory, monitoring of forest cover changes and forest damage assessment. In the present research forest cover change analysis in ‘Madhupur Sal Forest’ located in central part of Bangladesh has been investigated using satellite remote sensing data and spatial analysis. Transformation of ‘Sal forest’ to other landuse has been studied using the Landsat MSS (Multi Spectral Scanner) data of 1973 and Landsat 8 OLI (Operational Land Imager) data of 2015. Driving forces behind the transformation of ‘Sal forest’ has also been investigated through GPS (Global Positioning System) based ground verification and interview with the people living in the locality.J. Environ. Sci. & Natural Resources, 10(2): 73-78 2017
森林砍伐、退化、破坏、改造和过度开发是世界各地的共同问题。及时监测和评价森林资源可有助于处理和查明上述问题，从而可向森林资源管理者提供合理规划和管理森林的适当指导。除了传统的森林监测方法外，遥感以其独特的天气观测、实时性和重复性为森林资源的监测和评价提供了一种潜在的工具，因此遥感技术已成功地应用于森林清查、森林覆盖变化监测和森林损害评估等各种研究。本研究利用卫星遥感数据和空间分析对位于孟加拉国中部的“Madhupur Sal forest”的森林覆盖变化进行了调查。利用1973年的Landsat MSS(多光谱扫描仪)数据和2015年的Landsat 8 OLI(操作土地成像仪)数据，研究了“Sal森林”向其他土地利用的转变。通过基于GPS(全球定位系统)的地面验证和对当地居民的采访，还调查了“萨尔森林”转型背后的驱动力。环绕。科学。与自然资源，10(2):73-78 2017
{"title":"Forest Cover Change Analysis Using Remote Sensing Techniques in Madhupur Sal Forest of Bangladesh","authors":"M. A. Salam, M. Pramanik","doi":"10.3329/jesnr.v10i2.39015","DOIUrl":"https://doi.org/10.3329/jesnr.v10i2.39015","url":null,"abstract":"Deforestation, degradation, damages, transformation and over exploitation of forests are the common problem in different parts of the world. Timely monitoring and assessment of forest resources may help to address and identify the above mentioned problems and thus proper guidance may be given the forest resources manager for rational planning and management of forests. Apart from the conventional methods of forest monitoring, remote sensing with its unique capability of synoptic viewing, real time and repetitive nature offers a potential tool for monitoring and evaluation of forest resources and hence remote sensing technology has been successfully used in various studies like forest inventory, monitoring of forest cover changes and forest damage assessment. In the present research forest cover change analysis in ‘Madhupur Sal Forest’ located in central part of Bangladesh has been investigated using satellite remote sensing data and spatial analysis. Transformation of ‘Sal forest’ to other landuse has been studied using the Landsat MSS (Multi Spectral Scanner) data of 1973 and Landsat 8 OLI (Operational Land Imager) data of 2015. Driving forces behind the transformation of ‘Sal forest’ has also been investigated through GPS (Global Positioning System) based ground verification and interview with the people living in the locality.J. Environ. Sci. & Natural Resources, 10(2): 73-78 2017","PeriodicalId":15768,"journal":{"name":"Journal of Environmental Science and Natural Resources","volume":"7 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2018-11-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"75264799","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2018-11-29DOI: 10.3329/jesnr.v10i2.39026
Z. Haque, T. Jinan
The present study aims at investigating into the existing land tenure system of Dorirampur, Jhairpar and Goisa para at Traishal Upazila of Mymensingh District. Keeping in view the objectives 70 samples were randomly selected. Survey method was followed to collect required data. Sampled farmers belonged to six tenurial groups. Out of 70 respondents 34, 22, 16, 7, 10 and 11 percent of total were owner operators, part operators, part tenants, part operator-cum-part tenants, tenants and absentee landowners respectively during the study year. In the study, out of 70 respondents 67 percent were owner operator, 33 percent of them were tenant operators. The selected farmers in the study area practiced three types of share cropping system: i) fifty-fifty share cropping, ii) forty-sixty share cropping and iii) fixed amount of paddy payment. The average annual income were found to be Tk. 97096, 128267, 5215, 76340, 35871 and 113563 respectively for owner operator, part operators, part tenants, part operator-cum-part tenants, tenants and absentee landowner. Analysis of annual income reveals a positive relationship between tenure category and that of annual income during the study area.J. Environ. Sci. & Natural Resources, 10(2): 133-142 2017
{"title":"Impact of Land Tenure System on Socio-Economic Characteristics in Selected Areas of Mymensingh","authors":"Z. Haque, T. Jinan","doi":"10.3329/jesnr.v10i2.39026","DOIUrl":"https://doi.org/10.3329/jesnr.v10i2.39026","url":null,"abstract":"The present study aims at investigating into the existing land tenure system of Dorirampur, Jhairpar and Goisa para at Traishal Upazila of Mymensingh District. Keeping in view the objectives 70 samples were randomly selected. Survey method was followed to collect required data. Sampled farmers belonged to six tenurial groups. Out of 70 respondents 34, 22, 16, 7, 10 and 11 percent of total were owner operators, part operators, part tenants, part operator-cum-part tenants, tenants and absentee landowners respectively during the study year. In the study, out of 70 respondents 67 percent were owner operator, 33 percent of them were tenant operators. The selected farmers in the study area practiced three types of share cropping system: i) fifty-fifty share cropping, ii) forty-sixty share cropping and iii) fixed amount of paddy payment. The average annual income were found to be Tk. 97096, 128267, 5215, 76340, 35871 and 113563 respectively for owner operator, part operators, part tenants, part operator-cum-part tenants, tenants and absentee landowner. Analysis of annual income reveals a positive relationship between tenure category and that of annual income during the study area.J. Environ. Sci. & Natural Resources, 10(2): 133-142 2017","PeriodicalId":15768,"journal":{"name":"Journal of Environmental Science and Natural Resources","volume":"73 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2018-11-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"86327631","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2018-11-29DOI: 10.3329/jesnr.v10i2.39013
M. Latif, M. Latif
The research was conducted to find out the impacts of Beel sanctuary management on fish production of the HaltiBeelTanki fish sanctuary and socio-economic competence of adjacent fishermen, Natore, Bangladesh through random sampling with questionnaire survey and secondary data. The main objectives of the research were- to find out the present status of fish production of the Beel and to know the socio-economic condition of the surrounding fishermen. A total of 68 fishermen were selected and interviewed. In the studied Beel the annual fish production was 8.8 MT in 2012 where Beel sanctuary management increased the production up to 15.2 MT in 2013. The average fish production increased 2.6 MT per year. Fish species such as Ayre, Calbaosh, Pabda, Sharputi etc. were absent before the project (before 2012) but at present available at a rate of 20g, 1000g, 300g, and 1200g per day respectively. The study revealed that about 77% of the fishermen preferred nuclear family where only 23% joint family. It was found that about 63% fishermen were illiterate and there was no H.S.C pass fisherman. The average income of the selected fishermen was 8125 taka/month and about 58% fishers were able to save money 501-1000 taka/month after the project.J. Environ. Sci. & Natural Resources, 10(2): 55-63 2017
{"title":"Impacts of Beel Sanctuary Management Project on Fish Production and Socio -Economic Competence: a Study in the HaltiBeelTanki Fish Sanctuary","authors":"M. Latif, M. Latif","doi":"10.3329/jesnr.v10i2.39013","DOIUrl":"https://doi.org/10.3329/jesnr.v10i2.39013","url":null,"abstract":"The research was conducted to find out the impacts of Beel sanctuary management on fish production of the HaltiBeelTanki fish sanctuary and socio-economic competence of adjacent fishermen, Natore, Bangladesh through random sampling with questionnaire survey and secondary data. The main objectives of the research were- to find out the present status of fish production of the Beel and to know the socio-economic condition of the surrounding fishermen. A total of 68 fishermen were selected and interviewed. In the studied Beel the annual fish production was 8.8 MT in 2012 where Beel sanctuary management increased the production up to 15.2 MT in 2013. The average fish production increased 2.6 MT per year. Fish species such as Ayre, Calbaosh, Pabda, Sharputi etc. were absent before the project (before 2012) but at present available at a rate of 20g, 1000g, 300g, and 1200g per day respectively. The study revealed that about 77% of the fishermen preferred nuclear family where only 23% joint family. It was found that about 63% fishermen were illiterate and there was no H.S.C pass fisherman. The average income of the selected fishermen was 8125 taka/month and about 58% fishers were able to save money 501-1000 taka/month after the project.J. Environ. Sci. & Natural Resources, 10(2): 55-63 2017","PeriodicalId":15768,"journal":{"name":"Journal of Environmental Science and Natural Resources","volume":"20 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2018-11-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"85870322","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2018-11-29DOI: 10.3329/jesnr.v10i2.39032
Mahfuzur Rahman, Syed Hafizur Rahman, M. Chowdhury, Z. Fardous
Water flow is a vital requirement of a river to secure ecological health status. We investigated the low flow of Turag River and its effect on the heavy metals concentration. Generally, the water of the river flowed very less from January to May. The reverse result was found from June to October. Keeping in mind this fact, eight different heavy metals were statistically analyzed. We observed that during low flow season five heavy metals surpass the standard limit for irrigation. Considering irrigation standard, the order of contamination level was: Mn > Cd > Pb > Fe > Cr > Ni > Zn > Cu in low flow season. Therefore, it is necessary to maintain moderate flow in the river system.J. Environ. Sci. & Natural Resources, 10(2): 177-182 2017
水流是河流维持生态健康状态的重要条件。研究了图拉格河的低流量及其对重金属浓度的影响。一般来说，从一月到五月，这条河的流量很少。从6月到10月，结果正好相反。考虑到这个事实，我们对八种不同的重金属进行了统计分析。在枯水期，5种重金属均超过灌溉标准限值。考虑灌溉标准，枯水期污染程度顺序为:Mn > Cd > Pb > Fe > Cr > Ni > Zn > Cu。因此，保持水系的适度流量是必要的。环绕。科学。与自然资源，10(2):177-182 2017
{"title":"Impacts of Low Flows on Heavy Metal concentrations in Turag River Bangladesh","authors":"Mahfuzur Rahman, Syed Hafizur Rahman, M. Chowdhury, Z. Fardous","doi":"10.3329/jesnr.v10i2.39032","DOIUrl":"https://doi.org/10.3329/jesnr.v10i2.39032","url":null,"abstract":"Water flow is a vital requirement of a river to secure ecological health status. We investigated the low flow of Turag River and its effect on the heavy metals concentration. Generally, the water of the river flowed very less from January to May. The reverse result was found from June to October. Keeping in mind this fact, eight different heavy metals were statistically analyzed. We observed that during low flow season five heavy metals surpass the standard limit for irrigation. Considering irrigation standard, the order of contamination level was: Mn > Cd > Pb > Fe > Cr > Ni > Zn > Cu in low flow season. Therefore, it is necessary to maintain moderate flow in the river system.J. Environ. Sci. & Natural Resources, 10(2): 177-182 2017","PeriodicalId":15768,"journal":{"name":"Journal of Environmental Science and Natural Resources","volume":"33 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2018-11-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"76199339","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2018-11-29DOI: 10.3329/JESNR.V10I2.39024
Mrb Mizan, Kamrunnahar, M. Azad
Dental caries is very common to people of Bangladesh. The treatment of dental carries is very expensive so alternative lowcost option from plant products are important for the rural people. Bohera (Terminaliabellirica) is known to people for its medicinal values. The antibacterial activity of methanolic extracts of bohera bark and fruits were tested against dental caries causing bacteria Streptococcus mutans. It was found that crude extracts of both bark and fruits of bohera have the antibacterial activity against Streptococcus mutans. The crude extract was purified with sillica gel (230-300mesh)with gradient elution of methanol, ethanol and chloroform. The purified extract of bohera also showed strong antibacterial activity against dental caries causing bacteria Streptococcus mutans. The rural people of Bangladesh may use the barks and fruits of bohera to control the dental caries problem locally.J. Environ. Sci. & Natural Resources, 10(2): 117-120 2017
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Pub Date : 2018-11-29DOI: 10.3329/JESNR.V10I2.39019
M. Uddin, S. Talukder, Hossen, Mt Hossain
The study was conducted to investigate the physicochemical properties of the Old Brahmaputra River and Sewage water in Mymensingh Municipality. To perform the study fifty samples were collected from five different stations from the river and surrounding sewage discharge points. The samples were analyzed to determine pH, Electrical Conductivity (EC), Total Dissolved Solids (TDS), Dissolved Oxygen (DO), Biological Oxygen Demand (BOD), Lead (Pb) and Cadmium (Cd). The mean value of pH was 7.1 and 6.8 for river and sewage water samples, respectively. Mean EC value was 183 μS/cm and 589.18 μS/cm for river and sewage samples, respectively signifies that EC of all samples were within the acceptable range. 66.32 ppm and 260.36 ppm were the mean TDS value for river and sewage samples, respectively indicates no harm to aquatic lives and irrigation water use. Mean DO and BOD values for river water samples were 4.21 mg/L and 6.02 mg/L, respectively. 3.08 mg/L and 9.98 mg/L were the mean DO and BOD values for sewage water samples, respectively implies that river water is usable for irrigation but sewage water is unfit for it. Mean Pb concentration for river and sewage water samples was 0.428 ppm and 0.467 ppm, respectively.J. Environ. Sci. & Natural Resources, 10(2): 105-108 2017
{"title":"Physicochemical Analysis of Mymensingh Municipality Sewage Water and Old Brahmaputra River water","authors":"M. Uddin, S. Talukder, Hossen, Mt Hossain","doi":"10.3329/JESNR.V10I2.39019","DOIUrl":"https://doi.org/10.3329/JESNR.V10I2.39019","url":null,"abstract":"The study was conducted to investigate the physicochemical properties of the Old Brahmaputra River and Sewage water in Mymensingh Municipality. To perform the study fifty samples were collected from five different stations from the river and surrounding sewage discharge points. The samples were analyzed to determine pH, Electrical Conductivity (EC), Total Dissolved Solids (TDS), Dissolved Oxygen (DO), Biological Oxygen Demand (BOD), Lead (Pb) and Cadmium (Cd). The mean value of pH was 7.1 and 6.8 for river and sewage water samples, respectively. Mean EC value was 183 μS/cm and 589.18 μS/cm for river and sewage samples, respectively signifies that EC of all samples were within the acceptable range. 66.32 ppm and 260.36 ppm were the mean TDS value for river and sewage samples, respectively indicates no harm to aquatic lives and irrigation water use. Mean DO and BOD values for river water samples were 4.21 mg/L and 6.02 mg/L, respectively. 3.08 mg/L and 9.98 mg/L were the mean DO and BOD values for sewage water samples, respectively implies that river water is usable for irrigation but sewage water is unfit for it. Mean Pb concentration for river and sewage water samples was 0.428 ppm and 0.467 ppm, respectively.J. Environ. Sci. & Natural Resources, 10(2): 105-108 2017","PeriodicalId":15768,"journal":{"name":"Journal of Environmental Science and Natural Resources","volume":"69 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2018-11-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"80350090","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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