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- ItemEffects of Resampled DEM on Watershed Characteristics and Prediction of Sediment Load in Oyun Watershed, Kwara, Nigeria(Journal of Civil Engineering and Urbanism, 2024-09-25) Adeogun Adeniyi Ganiyu; Abdulrasheed. W. Mansur; Abdurasaq. A. MohammedUnderstanding the terrain and its impact on watershed characteristics, streamflow, and sediment loading is crucial for effective water resource management. This study investigates the influence of resampled Digital Elevation Models (DEM) on the prediction of watershed characteristics, streamflow, and sediment loading upstream of Oyun River Watershed, Nigeria. Various DEM resolutions, ranging from 30-meter to 90-meter, were analysed to assess their effects on hydrological predictions. To delineate the watershed, a DEM of 90-meter resolution was sourced from the space Shuttle Radar Topography Mission (SRTM), and the ASTER global DEM data sources. The 90 meter resolution was resampled to four different resolutions which are 75-meter, 60-meter, 45-meter, and 30-meter resolutions. The watershed and streamline were delineated, and the hydrologic simulation was performed using Soil and Water Assessment Tool (SWAT). The research findings revealed that changes in DEM resolution had a negligible impact on streamflow predictions within the Oyun River Watershed. However, a noticeable impact was observed in the prediction of sediment concentration. The 90-meter resolution DEM yielded the lowest predicted sediment concentration, measuring 2.28 mg/l, while the 30-meter resampled DEM produced the highest value at 5.21mg/l. Similarly, the sediment yield (SYLD t/ha) exhibited considerable variation across the different DEM resolutions, with the 90-meter DEM demonstrating the lowest value of approximately 528.90 t/ha, and the 30-meter DEM registering the highest at 2145.57 t/ha. Overall, this research highlights the necessity of careful DEM selection in hydrological modelling to ensure a comprehensive understanding of watershed dynamics, particularly in regions where sediment transport and water quality are of paramount concern.
- ItemInvestigation on Fluoride Concentration in Well Water and Its Health Implications: A Case Study of Gwagwalada, Gwagwalada Area Council, FCT, Abuja(2023-12-12) Habeeb Solihu; Ismaeel Abdulraheem; Solomon Olakunle Bilewu; Adeniyi Ganiyu AdeogunThis study focuses on determining the concentration of fluoride ions in selected hand-dug wells and investigating its health im plications in Gwagwalada Area Council, Federal Capital Ter ritory, Abuja. The necessity for this investigation arose from observed health issues, including dental and skeletal fluorosis among the residents in the area. Fifteen sampling points (well water sources) were chosen in the study area, and a total of for ty-five samples (three per sampling point) were collected. The calorimetric water quality analysis method was employed to an alyze these samples in the laboratory. Additionally, the Inverse Distance Weighting (IDW) interpolation method was used to generate a spatial variation map for fluoride ion concentration using ArcMap. The results indicate a concentration range of 0.122 mg/L to 1.910 mg/L across the study area. When com pared with the recommendations for fluoride ion concentration in the Nigeria Industrial Standard (NIS) for drinking water (0.1 – 1.0 mg/L), approximately 67% of the sampling points (10 out of 15) fall within the recommended values, while 33% fall out side. The areas with higher fluoride ion concentrations include Dupa 1, Dupa 2, Tunga Maje 1, Tunga Maje 2, and Old Ku tunku 2. The study concludes that the observed dental and skel etal fluorosis in these areas can be attributed to the consumption of water with high fluoride concentrations. Consequently, the study recommends increased attention from both local and fed eral authorities to provide potable water for human consump tion in these areas to address the associated health challenges
- ItemEFFECTIVENESS OF GIS-BASED APPROACH FOR FLOOD HAZARD ASSESSMENT OF ONA RIVER, IBADAN, NIGERIA(2022-04-21) Habeeb Oladimeji Ganiyu; Adeniyi Ganiyu Adeogun; S.B. BAKARE; A.S. AREMU: Flooding is one of the most reoccurrence natural disasters globally and the plan to mitigate the effects of flood cannot be over emphasized. This study assessed the flood stage and flood extent of Ona River, Ibadan, Nigeria using Geographic Information System (GIS) in concert with Hydrologic Engineering Center-Geographic River Analysis System (HEC-GeoRAS). The results of the study revealed that the highest flood stage was predicted at 4.73 m, and 33% of the flood prone areas has a flood stage above 2 m based on the developed inundation map which implies that human and urban infrastructure are not safe. In the case of flood extent, the smallest flood extent was estimated at 694 m2 (Mount Zion Baptist church at Oke-Ayo and its environs) while the largest flood extent was estimated at 115,329 m2. It is recommended that an emergency rescue plan should be formulated to mitigate the effect of flooding in the affected areas such as Sweeco Foods, Tedaz Organic Home, Rehoboth Cathedral, a section of Oluyole Estate Road, Zartech Limited, 7-Up Bottling Company, Obasanjo Farm, and a section of Arapaja estate which are most prone to floods.
- ItemEFFECTIVENESS OF SELECTED LOW IMPACT DEVELOPMENT (LIDS) FOR SUSTAINABLE STORMWATER MANAGEMENT IN FAST-URBANIZING RESIDENTIAL AREAS(Ethiopian International Journal of Engineering and Technology (EIJET), 2024-10-20) Adeogun Adeniyi Ganiyu; Sanni Abubakar; Ganiyu Habeeb OladimejiThe global trend of urbanization has led to the widespread conversion of natural land cover to impermeable surfaces. This, in turn, is hindering water infiltration and exacerbating runoff from precipitation. This phenomenon has detrimental effects on the natural environment and water quality. To address these issues of stormwater generation, this study employed the Storm Water Management Model (SWMM) in conjunction with MapWindow Geographical Information System (GIS) v4.X, a hydrologic data software for data, visualization, editing, and integration with other modeling tools to simulate the impact of various Low Impact Developments (LIDs) on mitigating stormwater in the study area. The study area was divided into six sub-basins within the GIS environment and imported into SWMM to assess the effects of selected LIDs, including green roofs, rain gardens, vegetative swales, and permeable pavements. The SWAT model was used to predict water flow in the Malete watershed and surface runoff. The study identified areas susceptible to erosion and categorized them as low, moderate, severe, and extreme. The results showed that permeable pavements exhibited the highest reduction rate, reducing stormwater by approximately 50% across all sub-basins, while green roofs showed the lowest reduction rate of only 0.003%. Regional calibration was implemented, revealing a significant correlation of 71% between simulated and observed flows in the study area. The findings of this study can serve as a valuable decision-support tool for stakeholders and authorities when selecting appropriate LID practices to mitigate the urban impact of stormwater generation.
- ItemSYNTHESIS, CHARACTERIZATION AND ANTIMICROBIAL STUDIES OF METAL COMPLEXES OF MIXED LIGANDS : CITRIC ACID AND AMODIAQUINE(Bayero Journal of Pure and Applied Sciences, 2017-12-02) Lawal, A.; Olowude, S.; Bamigboye, M.O .; Sa’ad, H.O; Amolegbe, S.A.; Yunus-Issa, M.T; Nnabuike, G.GA range of d-block transition metals complexes of mixed amodiaquine and citric acid have been synthesized and characterised using microanalytical technique, elemental analysis, FT-IR spectroscopy and magnetic measurement. The results of the analytical and spectroscopic data revealed that both amodiaquine and citric acid acted as bidentate ligands in their mode of coordination with the metal ions.The citric acid bound through the carbonyl (C=O) and hydroxyl groups to the metal ions while, amodiaquine coordinated through the nitrogen atom of the amine and oxygen donor atom of hydroxyl group; resulted in structures with octahedral geometry. Percentage composition and magnetic Bohr moment data indicated that all metal complexes were paramagnetic. Molar conductance measurement indicates that the complexes are non-electrolytes in nature. The antimicrobial activity of the ligands and their mixed complexes was carried out against g(+)Pseudomonas aeruginosa, g(+)E. coli, g(+)Klebsiella pneumonia, g(+)Staphylococcus aureus and g(+)Candida using Muller Hinton diffusion method . The citric acid and amodiaquine result showed low or moderate value from (0.6-0.8) for all the metal complexes with the exception of the Cu (II) complex having inhibitory zones ranging from 1-0-1.3, 0.7-0.9 at 200 ppm respectively. Moreover, the free ligands were found being less active compared with their mixed complexes