Surveying and Geoinformatics- Conference Papers

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Browsing Surveying and Geoinformatics- Conference Papers by Author "Makinde, E. O."

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    Open Access
    The application of remote sensing and GIS technology to erosion risk mapping
    (Multidisciplinary Digital Publishing Institute, 2018) Makinde, E. O.; Oyebanji, E. I.
    Erosion is one of the major problems in Nigeria and Lagos State in particular. The objectives of this research are to identify land use/land cover changes in Eti-Osa LGA and estimate actual erosion risk using Revised Universal Soil Loss Equation (RUSLE) model. In addition, this research evaluates the perception of communities within the study area with the view of understanding the risk involved in erosion. The result showed that the sediment yield of the study was estimated to be between 0 to 48 ton/ha/yr. The estimated soil losses were higher at Eti-Osa West, parts of Iru/Victoria Island, and Ikoyi/Obalende areas recorded low losses. Land uses mostly affected by very high and severe erosion are the bare soils and the crop lands having about 3% to 4% respectively compared to the others. It was concluded that combination of rainfall, lack of cover for the surface soil, were the major causes of soil loss in the study area.
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    Open Access
    The Perception of Communities Prone to Environmental Degradation
    (2nd Africa Regional Conference Technical Proceedings. Organization for Women in Science for the Developing World (OWSD) Organized under the Auspices of: University of Energy and Natural Resources (UENR), Sunyani, GHANA., 2014) Makinde, E. O.
    The activities of man affect the environment which in turn influences the climate. This study assesses these human activities by determining the perceived impact of oil spill and its attendant explosion and fire has on the environment. This study was carried out in Lagos, covering some coastal settlements in Amuwo-Odofin Local Government Area. Landsat 30 m (ETM+) of 2005 and Ikonos 10 m of 2007 were the satellite images used which were subjected to digital image processing and analysed. Also, the study area was divided into 3 strata and convenient sampling technique was used on each stratum to administer 200 copies of questionnaire for data collection which were analysed. The results showed that there was a decline in the high and light forested areas, respectively between 2005 and 2007. Furthermore, the result revealed that educational exposure affected the way the community perceived the impact of oil pipeline vandalization on the vegetation and strategies to prevent pipeline vandalization (F=2.8-5.9; p<0.05). It was concluded that oil pollution resulted in the reduction of vegetation while educational level affected the way in which the impact of the pollution was perceived.
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    Open Access
    Remote Sensing of Vegetation Stress and Indicators
    (Proceedings of Global Geospatial Conference 2013. Addis Ababa, ETHIOPIA, 2013) Makinde, E. O.; Salami, A. T.
    The study used spectra indicators to determine the health status of polluted vegetation. Global Positioning System with an accuracy of ± 5m were used to identified stress areas. The identified impacted areas were mapped out for the field and Multispectral satellite image (RapidEye, 2009 and 2011) study. Control plot was established in relatively unstressed area. Spectra measurements were taken using hyperspectral Analytical Spectral Device (ASD) Handheld2 Spectrometer within a field of view (FOV) of 25°. Spectral indicators were calculated and the relationship between these spectral indices and chlorophyll content of the vegetation were determined. The correlation coefficients of 0.5 and higher were observed in plot B and Plot C of Ogun. Plot C of Ogun of had a range of 0.6 -0.83 rho at p>0.01 for all the indices. The result of the Analysis of Variance identified the best ratio and vegetation indices that significantly differed between less stressed (control) and more stressed (impacted) plots. RedEdge indices had an F-ratio of 4.564 at p<0.01 and 2.731 at p<0.1 for VOG1. The image data analysis showed that there was a direct relationship between different pollution levels and the chlorophyll content of F-ratio 325.8 (p< 0.0001) and 93.36 (p < 0.001) for 2009 and 2011.The study concluded that vegetation impacted by oil spill pollution are unhealthy.
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    Open Access
    Spectral Indices for Detecting Change Trend in Vegetation affected by Hydrocarbon Spillage
    (International Proceedings of Chemical, Biological and Environmental Engineering (IPCBEE), Singapore, 2015) Makinde, E. O.
    Geo-informatics and in-situ technologies have made it possible to quickly assess, monitor and analyse vegetation biodiversity accurately in a non-destructive way. The goal of this study was to investigate the change trend based on the absorbance or reflectance of certain wavelengths of light by vegetation using spectral vegetation indices in Ogun state, South-West of Nigeria. Satellite images were obtained and ground hyperspectral data acquired with a ground-based integration system called Analytical Spectral Device (ASD) Handheld2 Spectrometer. Spectral indicators were calculated from both systems were analysed and compared. The information derived from the analyses had shown the potential to monitor the changes of affected vegetation.