March 2013
Physico-chemical and Escherichia coli assessment of selected sachet water produced in some areas of Minna, Niger State, Nigeria
Access to good quality drinking water in Minna and, indeed, other parts of Niger State is one of the biggest challenges to many households which have, for years, depended on other sources of water to augment the erratic supply made by the government. In an effort to ensure adequate supply, packaged water has been introduced to provide safe, hygienic and affordable drinking water. However, trends have...
March 2013
Study of specific power input and mass transfer coefficient in aeration of volatile organic compounds
The aeration of volatile organic compounds (VOC) is based on the mass transfer rate of VOCs from the liquid phase to the gaseous phase. Principle of air stripping involves the mass transfer of volatile organic contaminant from water to air. The system can be easily upgraded to strip greater amount of VOCs with relatively small increase in capital cost. Aeration tanks strip volatile compounds by bubbling air...
March 2013
Integration of HEC-RAS and geographical information system (GIS) in the hydrological study of peak flow response to deforestation on a small watershed in Malaysia
Land use change is one of the most serious environmental and hydrological problems nowadays. It has become a global issue including Malaysia due to the greenhouse effect. Land use changes cause a significant adjustment of the hydrological balance of a watershed mainly by eliminating evapotranspiration, redistributing and modifying the amount of rainfall that reach the ground. A 20 years historical data were...
March 2013
Validating the Soil Conservation Service triangular unit hydrograph (SCS-TUH) model in estimating runoff peak discharge of a catchment in Masvingo, Zimbabwe
The knowledge of runoff discharged by a catchment at its outlet is important for water accounting and water allocation to competing uses. Runoff generated by a catchment is important in determining the catchment water balance, estimating pollutant loads, and quantifying sediment yield and delivery ratio. The Soil Conservation Service triangular unit hydrograph (SCS-TUH) model was used in this study to...
March 2013
Atmospheric pollution from the major mobile telecommunication companies in Tanzania
Air pollution from five mobile telephone companies in Tanzania was investigated. Results show maximum noise level of 83 dB and a minimum of 61.4 dB, above a permissible 45 dB. Concentrations of NOx ranged from 0.135 mg/m3(NO) to 0.18 mg/m3(NO2), above a permissible level of 250 mg/m3. The applied Gaussian model estimated the contribution of the BS generators to the atmosphere, to be between 0.0006...
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