Department of Geography

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Department of Geography

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Browsing Department of Geography by Author "Ayanlade, Sina"

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    A-Geo-Informatics-Technique-for-the-Management-of-Meningitis-Epidemic-Distributions-in-Northern-Nigeria
    (Information Resources Management Journal, 2015-07) Jegede, Margaret O.; Ayanlade, Sina; Ayanlade, Oluwatoyin S. Ayanlade; Baloye, David O.
    This study aims at examining and mapping the spatiotemporal distribution of meningitis epidemic, in relation to climate variability, using GIS and Remote Sensing techniques. Using the northern part of Nigeria as a case study, data on meningitis epidemic were obtained from the archive of National Bureau of Statistics, Nigeria for the periods between 1998 and 2013. The data were updated with collection from Nigeria Demographic and Health Survey (NDHS). Also, Nigerian Ministry of Health has compiled consistent statistics on meningitis incidence for the periods. A meningitis distribution map was derived from an environmentally-driven form of predicted probability of epidemic experience as it is in International Research Institute for Climate and Society (IRI) Database. The results showed that Meningitis Epidemic is very high during months with low rainfall. Thus, seasonality of rainfall and temperature are important determinants of Meningitis Epidemic incidence in the Northern part of Nigeria. Therefore, it can be conrmed, as cited in some literatures, that the distribu- tion of the epidemics has a strong association with the environment, especially climate variability. Although meningitis surveillance systems in Nigeria have improved, they still fall short of the sensitivity required to demonstrate incidence changes in vaccinated and non-vaccinated cohorts and complementary approaches may be needed to demonstrate the impact of the vaccines. There is however, a need for a new technology and innovation like an integrated GIS, and other environmental modeling system, to allow health practitioners as well as policy makers, for better management, productivity and protability.
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    Assessing conflict impacts on urban physical infrastructure:
    (International Journal of the Physical Sciences, 2011-12) Ayanlade, Sina; Orimoogunje, Oluwagbenga O. I.
    This paper used geographic information systems (GIS) technique to assess the impact of conflict on land use in Ile-Ife and Modakeke in Nigeria. There has been limited systematic research work in terms of mapping the impacts of the communal crisis on the land use pattern using GIS. Therefore, the major aim of this paper is to map the impact of communal conflict on land use with the aid of GIS. Global positioning system (GPS) was used to take the co-ordinates of the affected area. The GIS map produced more than six years after the last clash between both communities. The research team counted 53 houses that were totally destroyed and remained to be re-built or rehabilitated.
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    Seasonality in the daytime and night-time intensity of land surface temperature in a tropical city area
    (International journal of Science of The Total Environment, 2016-12) Ayanlade, Sina
    Variations in urban land surface temperature (LST) links to the surrounding rural areas result to urban heat island (UHI), which is a global problem challenging both cities in develop and developing countries. Satellite data from the Moderate Resolution Imaging Spectroradiometer (MODIS), covering the period between 2002 and 2013 were analysed to examine seasonal variability in the daytime and night-time intensity of urban heat island (UHI), using Lagos metropolitan city of Nigeria as a case study. Contribution index (CI) and landscape index (LI) were used to estimate the LST contributions from non-urban and urban areas to UHI and assess the relationship between the Normalized Difference Vegetation Index (NDVI) and LST. The LI showed that both non-urban and urban areas contribute greatly to strengthen the intensity of LST during the daytime (with LI b1.0) and much more during the daytime in the dry seasons (LI = 0.13 in the year 2013). The correlation analysis showed seasonal variation in the relationship (R 2 ) between NDVI and the LST for both day and night times. The highest R 2 values were recorded for daytime, especially during the wet season (R 2 N0.90), while R 2 were very low in the night-time especially during dry season. The study indicates that reduction in vegetal cover in Lagos urban areas altered the terrestrial thermal and aerodynamic processes hence resulted in an intensification of UHI in the metropolitan city.