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- ItemOpen AccessRemote Sensing, A Vital Tool in Monitoring Climate Change(Proceedings of the 2nd Annual Conference of the Institute of Ecology and Environmental Studies, Ile-Ife, OAU., 2009) Omodanisi, E. O.; Salami, A. T.The impact of anthropogenic activities on the planet we inhibit has affected the climate. Humans are at risk as the earth is warming up. It is through the observation of atmosphere and hydrosphere data; and by using the latest technology such as Remote Sensing (RS) and geographical Information System (GIS) that climate change could be monitored, assessed, analysed and interpreted effectively on real time basis. This paper highlights how RS and GIS can be adopted in combating climate change.
- ItemOpen AccessRemote 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.
- ItemOpen AccessAn Assessment of the spectra characteristics of vegetation in south western Nigeria.(IERI Procedia, 2014) Omodanisi, E. O.; Salami, A. T.This study assessed the status of oil spill induced stress in the vegetation in Lagos and Ogun States, in the South West of Nigeria. The locations of oil spill impacted areas were identified on the field using information from the locals and a Global Positioning System with an accuracy of ± 5m and subsequently identified on the 5 m resolution RapidEye satellite image of 2009 and 2011. Field spectra were collected using Analytical Spectral Device (ASD) Handheld2 Spectrometer. The results showed varying spectral measurement of the impacted and the control. Indices were then used to distinguish less stressed from stressed vegetation which were statistically higher at F-ratio 4.825 (p < 0.01) and 3.194 (p < 0.01) in Lagos State; and 4.564 (p < 0.01) and 2.731 (p < 0.1) in Ogun State. It was concluded that oil spill had changed the spectra characteristics of impacted vegetation.
- ItemOpen AccessThe 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.
- ItemOpen AccessSpectral 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.