Surveying and Geoinformatics - Scholarly Publications

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Browsing Surveying and Geoinformatics - Scholarly Publications by Author "Balogun, A"

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    Open Access
    Evolving a Comprehensive Geomatics Multi-Criteria Evaluation Index Model for Optimal Pipeline Route Selection
    (Taylor & Francis Online, 2020-02-17) Hamid-Mosaku, I.A; Oguntade, F.O; Ifeanyi, V.I; Balogun, A; Jimoh, A.O
    Selection of pipeline routes is a geospatial multi-criteria evaluation problem since it involves the assessment of technical, environmental and safety-related factors that influence pipeline system operations. This study determines the optimal pipeline route for transmission of oil and gas products using the Dangote Refinery Project in Nigeria as a case study. Pertinent route selection factors were identified and structured into the expert feedback model of the Analytical Network Process (ANP) for accurate prioritization. LANDSAT 8 imageries of the study area were processed and classified into various land use and land cover types, which were further modelled in ArcMap 10.2 GIS software for routing analysis. Findings reveal that the most highly prioritized factors for proper route selection were the environmental and geological factors, while the least prioritized was the economic factor. In the end, alternative Route 2 was identified as the optimal route among the four evaluated alternative routes because of its minimum route length, minimum passage length through sensitive settlement areas, and less number of river, stream and existing platforms’ crossings.
  • Item
    Open Access
    Investigation of Sediment Accumulation in Ojo Creek Channel using Geostatistical Techniques
    (Journal of Engineering Research, Faculty of Engineering, University of Lagos, 2020-09) Jimoh, O.A; Hamid-Mosaku, I.A; Oguntade, O.F; Raheem, K.A; Balogun, A
    River channels are characterized with natural processes, anthropogenic activities, geomorphology, and climate change, resulting in sediment accumulation. This consideration, however, has geomorphic impacts on riverbed, bank erosion, channel widening, sediment deposition, floodplain scour and destruction of near structures; thereby, significantly impacting on safe navigation and aquatic habitat. This paper investigates sediment accumulation in Ojo creek channel over a period of 9 years using geospatial techniques. Acquired hydrographic, bathymetry, and geospatial information of the study area were structured into spatial database for further integration with spatial analysis using geostatistical methods of Kriging/Co-kriging interpolation method in ArcGIS environment. Relative comparisons of volume of the water over the years were done for accretion and erosion. The net loss and gain in material over the years were revealed to be 1,601,251.949m3 and 1,017,252,326.841m3 respectively. Therefore, the volume of sediment calculated to be approximately 1,015,651,074.892m3. Furthermore, prediction and error analysis conducted was used to quantify the effect of sediment deposits and volume of water in the river channel. Thus, this study provides a framework for quantifying sessions of the channel that requires dredging and the amount of sand dredged for channel maintenance leading to safe navigation and good water supply.