African Journal of
Environmental Science and Technology

  • Abbreviation: Afr. J. Environ. Sci. Technol.
  • Language: English
  • ISSN: 1996-0786
  • DOI: 10.5897/AJEST
  • Start Year: 2007

AJEST Articles in press

Article in Press

Outlier Based Selection and Accuracy Updating of Digital Elevation Models for Urban Area Projects

Continuing degradation of urban environments of developing economies results from failure to make decisions based on scientific methods that employ accurate digital elevation models (DEM) in modelling environmental phenomena such as flooding and erosion. Data dumping and wastage occur if fresh DEM are required for every new project ignoring existing data. Every DEM to be used for modelling may be accepted as is, updated or...

Author(s):Akajiaku C. Chukwuocha

Article in Press

ANALYSIS OF SPATIAL VARIABILITY IN RAINFALL TRENDS IN BARINGO COUNTY, KENYA

This study assessed actual rainfall trends and variability in Baringo County. The objective of the study was to determine whether there were variations in rainfall trends by agro ecological zones. Meteorological rainfall data for the period 1981 to 2010 from three distinct agro-ecological zones covering highland (LH 2), low land (IL 6) and midland (LM 5) was used. The choice of rainfall stations was informed by...

Author(s):Ednah Chemutai Koskei , Jackson John Kitetu and Charles Wambongo Recha

Article in Press

Management status and perception of post quarried sites in Ndarugu Kiambu, Kenya

In recent times, rapid changes in buildings and infrastructural development have increased demand for construction materials. Ndarugu quarries located about 35 km north of Nairobi CBD is one of the main sources of building materials. The visible evidence of stone mining are the post-quarried sites scarred along the Ndarugu ridge, which has altered the original land condition and continues to affect people who live in...

Author(s):Stephen Waringo Waweru John Bosco Njoroge Aggrey Ochieng Adimo

Article in Press

Periodic Report on the Vea Dam’s Water Quality for Artisanal Fishery, Irrigation Agriculture and Domestic Purposes in Bongo District of Upper East Region in Ghana

The physico-chemical quality of 180 water samples from the Vea Dam in Bongo District of the Upper East Region were analyzed using standard field and laboratory techniques at the Water Research Institute, Tamale in Northern Region of Ghana. The mean ranges of the respective parameters were much closer within the same rows. Its maximum values were : total dissolved solids (85.23 ± 13.162mg/l), conductivity (141.667 ±...

Author(s):Tiimub Benjamin Makimilua, Anarigede Francis Atampika& Tiimob Richard Wonsibe

Article in Press

Seasonal Variation of Heavy Metal Speciation in soil and stream sediments from hospital waste dumpsite in Ilesa, Southwestern Nigeria

A speciation study of some heavy metals in soil and stream sediments around a hospital waste dumpsite was investigated. Selective sequential extraction procedure was used to fractionate the metals into 4 operationally defined groups: Exchangeable and metal bound to carbonate, oxyhydroxide of Fe and Mn, organic matter and the residual fraction. The result of speciation analysis of Fe, Mn, Zn, Cu, Cd and Pb in the soil...

Author(s):Oluyemi E.A, Olabanji I.O, Fakoya O.T, EludoyinA.O and Makinde, W.O

Article in Press

GROUNDWATER QUALITY AND SANITARY RISKS ASSESSMENT OF SHALLOW WELLS IN THREE WATERSHEDS OF UPPER ATHI RIVER BASIN, KENYA

This research assessed the sanitary conditions, risk factors and an identification the factors and sources that contribute to pollution of 17 shallow wells located in the Upper Athi River Basin, in Kaimbu County, Kenya using the sanitary assessment inspection methodology prescribed by the World Health Organization. Data obtained from the study was presented and explained using descriptive statistics. One (1) of the shallow...

Author(s):Ebenezer Ashun and George Lartey – Young

Article in Press

Assessment of trace metal distribution and contamination in poultry farm surface soil of Osun State, Southwestern Nigeria

In this study, the seasonal variations in concentration levels of selected heavy metals (As, Cd, Cu, Fe, Pb and Zn) in soils within the vicinity of the three major poultry farms in Osun State, South-Western Nigeria were investigated during two major seasons of Nigeria to ascertain the possible environmental impact of these agricultural farmland. Results of the atomic absorption spectrophotometric (AAS) analysis of samples...

Author(s):Taiwo Olusegun Ogunwale, John Adekunle O. Oyekunle, Aderemi Olufemi Ogunfowokan, Abimbola Bankole Akinyele and Olalekan Ayo Akindolani

Article in Press

EVALUATION OF DISPERSED WATER FROM NIGERIA’S CRUDE OIL BLEND AND ITS EFFECTS ON CRUDE OIL PROPERTIES AND PRODUCTION EQUIPMENT

Dispersed water from crude oil obtained from ten different producing wells in the Niger Delta area of Nigeria were analyzed based on American Standard for Testing and Materials to determine the effects of the physicochemical properties on crude characteristics and the production equipment. Results shows: pH (7.51-8.60), salinity (11174.00 - 21469.00 mg/l), conductivity (12698.00 - 24396.00 µS/cm), sulphate (3.00 - 23.00...

Author(s):Chikwe T. N. and Onojake, M. C.

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