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Akinyemi, M. L.
- Application of Shallow Seismic Refraction Method and Geotechnical Parameters in Site Characterization of a Reclaimed Land
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Authors
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1 Department of Physics, College of Science and Technology, Covenant University, Ota, Ogun State, NG
2 Department of Physics, Faculty of Science, University of Ibadan, Ibadan, Oyo State, NG
1 Department of Physics, College of Science and Technology, Covenant University, Ota, Ogun State, NG
2 Department of Physics, Faculty of Science, University of Ibadan, Ibadan, Oyo State, NG
Source
Indian Journal of Science and Technology, Vol 9, No 45 (2016), Pagination:Abstract
The recent incessant cases of building collapse have made it necessary for building site to be characterized before they are developed especially when the land is reclaimed from water bodies. On the basis of the above, both geophysical and geotechnical methods are engaged to determine the subsurface structure of a land for construction purposes. In this research effort, near surface seismic refraction method together with relevant geotechnical methods were used to characterize the subsurface condition of the study site. Nine seismic refraction profiles were surveyed with some of the profiles laid parallel and some others overlain one another. The result of this study revealed three geologic layers in the site with varying geotechnical parameters. The Young’s modulus, bulk modulus and shear modulus all have values that ranges from 0.071-25.685, 0.083-30.042 and 0.0286-10.395 GPa respectively in the site. From these results, it can be concluded the third layer having the highest value of geotechnical parameters is the most competent and this layer is between 7.5 m and 18 m into the subsurface. The information obtained from other geotechnical methods in the site confirmed the results of this study. Thus, near surface seismic refraction method is recommended for a non-invasive, non-cumbersome and reliable site characterization.Keywords
Characterization, Geotechnical Parameters, Reclaimed Land, Shallow Seismic Refraction, Subsurface Structure.Full Text
- Aerosols Loading Trends and its Environmental Threats Over Cotonou-Benin
Abstract Views :119 |
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Authors
Affiliations
1 Department of Physics, Covenant University, Canaan Land, P.M.B 1023, Ota, NG
1 Department of Physics, Covenant University, Canaan Land, P.M.B 1023, Ota, NG
Source
Nature Environment and Pollution Technology, Vol 15, No 3 (2016), Pagination: 1111-1116Abstract
Environmental security is totally relegated in countries of West Africa. The monitoring of the aerosols loading over Cotonou was the aim of this study. The outcome of our finding has salient links to food security, aviation and communication industry, thermal comfort and climate system of Benin. Cotonou is located on longitude 2.43°E and latitude 6.37°N. Fifteen years data were obtained from the multiangled spectro-reflectometry (MISR). The aerosol loading was monitored using analytical and statistical techniques. The aerosols retention over Cotonou was high in 2000 (69.91%), 2008 (72%) and 2013 (42.45%). This means that there is the possibility of higher rising sea levels and exposure to coastal erosion due to a twisted cloud formation.Keywords
Environmental Security, Aerosols, Bamako, MISR, Cotonou-Benin.Full Text
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