Founding Editor: Prof. Dele Ogunseitan
Abbreviation: Afr. J. Environ. Sci. Technol.
Start Year: 2007
Page 1 of 44, showing 20 records out of 862 total, starting on record 1, ending on 20
DOI: 10.5897/AJEST2017.2427[Article Number: 895B5AE66857]
Groundwater is an important freshwater resource in Tanzania. However, rapid urbanization, informal/unplanned settlements and agricultural intensification in major basins threaten its sustainability. Most groundwater aquifers in the country are not monitored or managed, thus exposing them to potential contamination and overexploitation. This paper is based on a research conducted in the months of February and March,... Read more.
DOI: 10.5897/AJEST2016.2173[Article Number: 8832A1966756]
In this study, we established changes in minimum and maximum temperature over the past 20 years, and how these changes are likely to affect the status of key banana pests and black Sigatoka disease in main banana cropping systems. A survey was conducted at elevations of 1200, 1400, 1600 and 1800 m above sea level in 13 sites previously used in 1992/1993. Mean monthly minimum and maximum temperatures at different... Read more.
DOI: 10.5897/AJEST2017.2358[Article Number: F1195EE66752]
The potentials and limitations of very high spatial resolution images for aboveground carbon (AGC) estimation are unknown and the methods are not developed. This research was designed to develop a method that predicts AGC at the individual tree level using object-based analysis of very high resolution QuickBird satellite images and in situ diameter at breast height (DBH) measurements. This study was based on the fact... Read more.
DOI: 10.5897/AJEST2017.2348[Article Number: 976D57B66518]
In Niger, climate change affects the majority of the population, especially the rural communities. The present study intends to contribute to the understanding of the actual perception of climate changes by the population along with the degree of apprehensiveness of the population regarding the climatic manifestations described by scientists. To this end, two communities have been targeted in the Department of Dakoro.... Read more.
DOI: 10.5897/AJEST2017.2353[Article Number: 56A14E166520]
Awash River has important socio-economic and ecological values in Ethiopia. On the contrary, it is prone to serious water pollution. This study aims to assess the spatial and temporal variation of water quality of the river. Means of the 9 years’ (2005-2013) water quality dataset of 19 parameters from 10 stations in the basin were considered. After validating, normalizing and checking the sampling adequacy and... Read more.
DOI: 10.5897/AJEST2017.2421[Article Number: B022E4166522]
Most of the leather industries in Ethiopia discharge their effluent partially or without any treatment to the nearby water bodies. This creates a serious effect on aquatic biota and surrounding environment due to its high organic loading and chromium content. To minimize the effect, tannery wastewater should be treated before the effluent is discharged to the environment. Therefore, the main objective of the study was... Read more.
DOI: 10.5897/AJEST2017.2360[Article Number: AA0247265921]
Anaerobic co-digestion improves the pig faeces digestion process. This work presents anaerobic digestion of pig faeces (C) as compared to 2 co-substrates: Sludge (L) from waste waters and bovine ruminal gastric content (R). Pig faeces used were generated in a local farm at the Juarez Autonomous University of Tabasco (UJAT), with a total population of 148 animals. Analytical determinations were made on the substrate and... Read more.
DOI: 10.5897/AJEST2017.2275[Article Number: 20D5B3365923]
This study was conducted in Arsi Negelle woreda of West Arsi Zone, Oromia regional state. The main objective of the study was to investigate the impacts of soil bund on soil physical and chemical properties in Arsi Negelle woreda. The soil data was collected from sites namely: lowland, midland and highland and from soil bunds aged >4 years, <4 years and control of farmland. Three representative sites were selected... Read more.
DOI: 10.5897/AJEST2017.2382[Article Number: 8126E4065928]
Twelve sheets of aeromagnetic and aeroradiometric data covered the study area. The data was used to investigate heat sources. The aeromagnetic data were combined to form a composite map- total magnetic intensity (TMI) anomaly map and aeroradiometric data of each radio-element were combined to produce the radioelements maps. Regional-residual separation of the total magnetic intensity data was performed using polynomial... Read more.
DOI: 10.5897/AJEST2016.2252[Article Number: F2E344366053]
As part of the African Monsoon Multidisciplinary Analysis (AMMA) project, the FAAM BAe-146 research aircraft sampled the lower and mid-troposphere around the West Africa sub-region. Back trajectory analysis of the air parcels sampled on-board during the entire duration of the flights showed the history and fate of the air parcels. Data from flights B228 and B231 showed strongly enhanced carbon monoxide (CO) and ozone... Read more.
DOI: 10.5897/AJEST2015.2069[Article Number: 9DD957366057]
The paper dealt with increased streamflow dynamics and implications for flooding in the Lower River Benue Basin. The study utilised data collected over a period of more than fifty years (1955-2012) from three hydrological stations operated by the Nigerian Hydrological Services Agency (NIHSA). The average discharge at Umaisha was 4,919.47 cubic metres per second (m3/s). Average discharge at Makurdi hydrological station... Read more.
DOI: 10.5897/AJEST2017.2367[Article Number: B51EA9665575]
Growth of cities in developing countries comes with increasing transportation and industrial activities which may contribute to accumulation of heavy metals in the environment. This paper provides a review of studies on heavy metals in Malawi`s environment, their potential environmental impacts and possible removal methods with comparisons to other selected countries. The reviewed data from Malawi showed that in water... Read more.
DOI: 10.5897/AJEST2015.1910[Article Number: BE20F1E65579]
Drill cuttings, generated in oil well drilling are managed to be disposed but will always have many environmental impacts. The innovation of this study was not only to produce a new and cost-effective material from drill cuttings, but also to mitigate its negative environmental impacts. Therefore, this article aims at characterizing and assessing behavior of drill cutting (DCI) deriving from well drilling activities in... Read more.
DOI: 10.5897/AJEST2014.1720[Article Number: 34E2DC565581]
Stakeholder involvement and participation are essential in achieving sustainable integration and sound environmental management of protected areas in Nigeria. Involvement and participation of local communities in conservation and management of Osse River Park were assessed through administration of structured questionnaires while relevant State Government Ministries in Environmental and Nature Resources Management and... Read more.
DOI: 10.5897/AJEST2016.2256[Article Number: 9B914B465585]
The objective of this work was to analyze the spatial variability of soil aggregates, porosity and density under five different land-uses and management conditions (degraded substrate - SD; degraded substrate with sewage sludge and Eucalyptus crop - SDLE; soil under pasture SP; capoeira under regeneration - SR; and soil under cerrado - SC). Total porosity (m3.m-3) and density (Mg m-3) of the soil; the mean weight... Read more.
DOI: 10.5897/AJEST2017.2340[Article Number: 60C213665187]
Urbanization is a global phenomenon with more pronounced consequences on waste management in developing countries. The rate of infrastructure development is mostly outpaced by the rate of waste generation. Bahir Dar city, as a rapidly urbanizing city in the southern part of Lake Tana, is not an exception. On top of production of more wastes, the waste management practice is challenged by low prioritization of waste... Read more.
DOI: 10.5897/AJEST2016.2160[Article Number: 2170B2365189]
This article seeks to investigate whether concern for food security and investment liberalization are the principle drivers of land-grabbing in Africa. The investigation demonstrates that, in addition to food security concern, climate change and energy security considerations have been key catalysts arousing hunger for farmland, forests, and fisheries resources in Africa. In particular, certain provisions of the United... Read more.
DOI: 10.5897/AJEST2017.2325[Article Number: B3837E465191]
Land use dynamics are known to cause considerable modifications to the environment with broad and sometimes severe impacts on water quality and aquatic natural resources. In this study, the impacts of land use practices on water quality were estimated during the dry and wet seasons in Ruiru and Ndarugu Rivers, Kenya using remote sensing, geographic information systems and statistical techniques. A total of 12 sampling... Read more.
DOI: 10.5897/AJEST2016.2167[Article Number: 86C54CF65453]
Landslide hazards have in the last 10 years become more prominent on the Mt. Elgon ecosystem in Uganda often culminating into disasters. In this study, the community was assessed on their vulnerability to landslide hazards and the efficacy of existing institutional mechanisms with a view of improving resilience and disaster risk reduction. The study area was selected based on historical information of landslide... Read more.
DOI: 10.5897/AJEST2017.2319[Article Number: 00DE37E64760]
Increased population pressure and environmental stressors have amplified research on water quality both locally and globally. In Tanzania, water quality assessment is a mature discipline, with an over four-decade history. In this article, studies on water quality assessment in Tanzania from 2006 through 2016 are reviewed. The approach used is to scan selected publications to gather data and information on types and... Read more.
Page 1 of 44, showing 20 records out of 862 total, starting on record 1, ending on 20