Surveying & Geoinformatics
Permanent URI for this collectionhttp://197.211.34.35:4000/handle/123456789/70
Surveying & Geoinformatics
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Item Flood Inundation Mapping of Gbaganu Area Minna, Niger State(School of Environmental Technology, Federal University of Technology, Minna, Niger State, 2021-05-05) Adesina, E.A., Saka, T.T., Adewuyi A.I., Ayoade, S.A., and Ayndeji, M.A.Flooding in recent times has become a critically problematic phenomenon of spatio-temporal order and considerably high frequency of occurrence worldwide. Gbeganu area of Minna covering an area of 16.389 hectares within Niger State. Nigeria has witnessed and is still witnessing multivariate cases of flooding, which peak in the rainy season (April-October) of every year, resulting in loss of life and economic valuables/properties. To curb this menace, an integrated solution of drainage morphometric parameters with remote sensing and geographical information system capacity is thus herein presented using the downloaded Shuttle Radar Topography Mission (SRTM) of 1-arc second (30 m resolution) which covers nearly the entire Niger State and the DEM of the study area was extracted and digital elevation model (DEM) generated from topographical point data (position and elevation of points within the area) taken with Differential Global Positioning System receivers and the satellite image of the study area to delineate watershed, contributing area, flow direction and flow path/channel. The Height Above the Nearest Drainage (HAND) tool was used on the ArcGIS software for analyses. The study produced a map depicting regions within the study area: regions that are highly susceptible to flooding. The morphometric analysis of flood inundation hazard in the area watershed shows that the risk to buildings will be more serious shortly, meanwhile, the implementation of flood countermeasures and the identification of priority areas for flood risk reduction using the flood inundation map will also help to reduce the flood impacts within the study area.Item GIS-based soil loss estimation using revised universal soil loss equation(7th Intercontinental Geoinformation Days (IGD)-Peshawar, Pakistan, 2023-11-19) Ekundayo Adesina, Oluibukun Ajayi, Joseph Odumosu, Abel IllahSoil loss estimation plays a vital role in the management and conservation of land and water resources, offering vital insights for watershed-level development in various regions. This study focuses on the development of a soil loss model for the Bosso Local Government Area in Minna, Nigeria, utilizing the Revised Universal Soil Loss Equation (RUSLE). Integration of Landsat images, Digital Elevation Models (DEM), rainfall and precipitation records, and soil erodibility factors were employed to estimate the average annual soil erosion within the study area. The individual parameters of the RUSLE model were integrated into the ArcGIS environment using the raster calculator in the Arc toolbox. The results reveal that an alarming 6672.83 tonnes per hectare per year of soil are lost annually in the study area. This rate of soil erosion raises concerns about the sustainability of agricultural practices in the study area. The findings underscore a critical absence of conservation practices or plans to combat and mitigate soil erosion in the region. In light of these findings, it is imperative that local government authorities, in collaboration with various ministries, take immediate action to promote and enforce conservation measures aimed at combating soil erosion within the area