African Journal of Environmental Science and Technology最新文献_第7页

The environmental impact of landfill fires and their contaminant plumes at the Chunga landfill site, Lusaka, Zambia 赞比亚卢萨卡Chunga垃圾填埋场火灾及其污染物羽状物对环境的影响

African Journal of Environmental Science and Technology Pub Date : 2021-12-31 DOI: 10.5897/ajest2021.3008

Milimo Muleya, Graham Hinchliffe, M. Petterson

{"title":"The environmental impact of landfill fires and their contaminant plumes at the Chunga landfill site, Lusaka, Zambia","authors":"Milimo Muleya, Graham Hinchliffe, M. Petterson","doi":"10.5897/ajest2021.3008","DOIUrl":"https://doi.org/10.5897/ajest2021.3008","url":null,"abstract":"The management of solid waste is recognised as a challenging activity with respect to the environment, particularly within rapidly growing urban centres in Lower Income Countries. This paper examines the issue of landfill-waste-generated fires and resultant pollution plumes sourced within the Chunga Landfill Site, Lusaka, Zambia. The authors present the results of a geospatial analysis research programme to map and assess risks posed by landfill combustion. The project identified fires and their plumes in the period 2013 to 2019. Pollution plumes are predominantly oriented East to West but also form plumes blowing towards the South West and North West. The area impacted by landfill plumes increased from 34 ha in 2013 to 133 ha in 2019. There is significant existential and potential human-exposure to these plumes. An estimated 5000 residents live within the areas affected by landfill-combustion-plumes. The authors suggest the following framework for landfill management to be adopted: (1) for waste to be increasingly sorted and segregated with different disposal options developed for different types of waste; ( 2) for methane and gas evacuation pipes to be inserted into the Chunga Site in a systematic rectilinear manner which allows for its safe dispersal: alternately collect the gases as usable biogas; (3) rapid extinguishing of any fires; (4) weekly monitoring of the landfill site by UAV and on-theground inspections; (5) active weekly monitoring of air quality; (6) develop a communication strategy that aims to engage local residents and other stakeholders concerning Chunga Landfill waste management; (7) the further drafting of medium-long term waste management policy in Lusaka that takes account of the rapid population growth and increasing landfill requirements.","PeriodicalId":7483,"journal":{"name":"African Journal of Environmental Science and Technology","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-12-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"89619639","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}

引用次数: 0

Analysis of the deposit conditions of sedimentary series of fluvio-lacustrine and aeolian origin in the Djourab desert, in Northern Chad 乍得北部Djourab沙漠河湖沉积系沉积条件及风成成因分析

African Journal of Environmental Science and Technology Pub Date : 2021-11-30 DOI: 10.5897/ajest2021.3042

A. Moussa, Nour Abdallah Mahamat, H. Abderamane, H. Mackaye, A. Likius, M. Schuster, P. Duringer, J. Ghienne, P. Vignaud

引用次数: 0

Spatio-temporal dynamics of land use on the expansion of coffee agroforestry systems in Cameroons production basins 喀麦隆咖啡生产盆地扩展农林复合系统的土地利用时空动态

African Journal of Environmental Science and Technology Pub Date : 2021-11-30 DOI: 10.5897/ajest2021.3073

Kuete Fogang Marcien, Louise Avana Tientcheu Marie, Tankou Christopher, Ndo Eunice

引用次数: 0

Improving future temperature projections with bias correction methods in Lake of Guiers/Senegal 用偏差校正方法改进塞内加尔盖耶尔湖未来温度预测

African Journal of Environmental Science and Technology Pub Date : 2021-11-30 DOI: 10.5897/ajest2021.3031

B. S. Alioune

{"title":"Improving future temperature projections with bias correction methods in Lake of Guiers/Senegal","authors":"B. S. Alioune","doi":"10.5897/ajest2021.3031","DOIUrl":"https://doi.org/10.5897/ajest2021.3031","url":null,"abstract":"Climate models are generally used to evaluate the climate change impacts. However, they have important biases at the regional or local scales. This study evaluates the future temperature projections in Lake of Guiers/Senegal. For this, the daily maximum and minimum temperature from the ensemble mean of five (5) Coordinated Regional climate Downscaling Experiment (CORDEX) regional climate models (RCMs) under the greenhouse gas scenarios RCP4.5 and RCP8.5 and three (3) bias correction methods (Linear scaling, variance scaling and quantile mapping methods) were used. The performance of raw ensemble mean of the models was first evaluated against the WFDEI data. The results show that this latter exhibits some limitations to reproduce the minimum and the maximum temperature at the Lake scale. In order to make temperature data more accurate, the three bias correction methods were used. Results show that bias correction methods improve well the simulated minimum and maximum temperature. The future temperature projections show an increase of temperature which are faster in bias-corrected data. From the results it is indicated that it is necessary to implement appropriate adaptation measures to address these climate changes.","PeriodicalId":7483,"journal":{"name":"African Journal of Environmental Science and Technology","volume":"18 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-11-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"81844778","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}

引用次数: 0

Use of effective microorganisms to enhance cost-effective biogas purification at the household level 使用有效的微生物，以提高成本效益的沼气净化在家庭层面

African Journal of Environmental Science and Technology Pub Date : 2021-11-30 DOI: 10.5897/ajest2020.2935

Minza Selele, M. S. Mgana, E. S. Mbuligwe

引用次数: 0

Analysis of the influence of precipitation patterns on wetland sizes in South-Eastern Zimbabwe 津巴布韦东南部降水模式对湿地大小的影响分析

African Journal of Environmental Science and Technology Pub Date : 2021-10-31 DOI: 10.5897/AJEST2020.2862

F. Makarati, T. Ruhiiga, L. Palamuleni

{"title":"Analysis of the influence of precipitation patterns on wetland sizes in South-Eastern Zimbabwe","authors":"F. Makarati, T. Ruhiiga, L. Palamuleni","doi":"10.5897/AJEST2020.2862","DOIUrl":"https://doi.org/10.5897/AJEST2020.2862","url":null,"abstract":"In this paper, the hypothesis that rainfall variability has an impact on wetland loss is tested. There is limited research in Zimbabwe that recognises the influence of rainfall variability on wetland loss. The purpose of this research is to determine the influence of rainfall variability on wetland size over time. Topographical maps, for the period 1972 to 2008, provided data on wetland locations and their changes in size with time. Rainfall data for Masvingo province for the 1980 to 2015 period was obtained from the Meteorological Services Department (MSD) of Zimbabwe. Statistical analysis shows that there is no relationship between rainfall variability and wetland loss. It can be concluded that there is no relationship between rainfall variability and wetland loss therefore. The research findings show that the rates of change in wetland size differ from one wetland to another. The implications on wetland management are that interventions should largely address human causal factors of wetland loss than rainfall variability. Therefore, it is vital to devise a wetland rehabilitation plan that enables management of water from the rivers and wetlands that the communities depend on. \u0000 \u0000 \u0000 \u0000 Key words: Climate change, rainfall variability, standard precipitation index (SPI), wetland rehabilitation, Zimbabwe.","PeriodicalId":7483,"journal":{"name":"African Journal of Environmental Science and Technology","volume":"10 1","pages":"439-450"},"PeriodicalIF":0.0,"publicationDate":"2021-10-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"83508450","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}

引用次数: 1

Food waste produced lactic acid for pathogen inactivation, urea stabilization and odor control in feces 食物垃圾产生乳酸，用于灭活病原体、稳定尿素和控制粪便中的气味

African Journal of Environmental Science and Technology Pub Date : 2021-10-31 DOI: 10.5897/ajest2021.3056

Getaneh Zerihun, N. Agizew, D. Adey, G. Nancy

引用次数: 0

Spatio-temporal distribution of Naididae tubificids species and bio-evaluation of the quality of some surface water bodies of Yaound, Cameroon 喀麦隆雅温得部分地表水水质生物评价及管状奈笛科物种时空分布

African Journal of Environmental Science and Technology Pub Date : 2021-10-31 DOI: 10.5897/ajest2021.3049

Y. D. A. Moussima, G. Ajeagah, Bilong Charles Félix Bilong

引用次数: 0

Assessing and plugging the missing links for effective community participation in the Strategic Environmental Assessment and Land Use Plan of Yala Wetland, Kenya 评估并填补肯尼亚雅拉湿地战略环境评估和土地利用规划中社区有效参与的缺失环节

African Journal of Environmental Science and Technology Pub Date : 2021-10-31 DOI: 10.5897/ajest2020.2930

Ouma Odero Douglas, A. O. Victor

引用次数: 0

Assessment of heavy metal concentrations in Mango fruits grown in Kasese district, Uganda 乌干达卡塞塞地区芒果果实中重金属浓度的评估

African Journal of Environmental Science and Technology Pub Date : 2021-10-31 DOI: 10.5897/AJEST2021.3041

G. Muhwezi, Johnson Thembo, Juliet Kyayesimira

{"title":"Assessment of heavy metal concentrations in Mango fruits grown in Kasese district, Uganda","authors":"G. Muhwezi, Johnson Thembo, Juliet Kyayesimira","doi":"10.5897/AJEST2021.3041","DOIUrl":"https://doi.org/10.5897/AJEST2021.3041","url":null,"abstract":"Fruits are a good source of carbohydrates, sugars, dietary fiber, fat, proteins, vitamins and minerals. In this study, mango fruits grown in Kasese as well as the soil and irrigation water used in fruit growing were analysed for heavy metals cadmium (Cd), chromium (Cr) and lead (Pb). The mango fruits and soil samples were obtained from three sites; Mubuku Irrigation Scheme, Mpondwe-Lhubiriha Town Council (MLTC) and Nyakiyumbu Sub-County in Kasese district. The concentration of Cd was below detection levels in all samples of soil, irrigation water and mango fruits. The mean concentrations of Pb and Cr in the mango fruits was 0.32 ±0.08 and 0.4±0.07 mg/kg dry weight while in soil were 69.98 ± 4.24 mg/kg and 13.403±2.03 mg/kg respectively and that in irrigation water were 0.1127± 0.014 mg/L and 0.0171 ± 0.003 mg/L respectively. The concentration of Pb in mango fruits and in irrigation water was above the maximum permissible limits (MPL) while Pb in soil and Cr in all study matrices were within the MPL by WHO and Dutch standards. These findings suggest that in general, mango fruits grown in Kasese as well as irrigation water have high concentration of Pb and may be a health risk to consumers. \u0000 \u0000 \u0000 \u0000 Key words: Heavy metals, Mango fruits, soil, irrigation water, Kasese, Uganda.","PeriodicalId":7483,"journal":{"name":"African Journal of Environmental Science and Technology","volume":"17 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-10-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"77860387","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}

引用次数: 0