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Research Article
A Geospatial Assessment of Campus Growth on the Urbanization of Ado Ekiti, Ekiti State Nigeria
Ogunlade Simeon Oluwole,
Oyewunmi Emmanuel Gbenga*
Issue:
Volume 12, Issue 2, December 2024
Pages:
33-45
Received:
19 October 2024
Accepted:
6 November 2024
Published:
28 November 2024
Abstract: This study examines the influence of campus growth on the urbanization of Ado Ekiti, Ekiti State, Nigeria, focusing on metropolitan urban sprawl. Utilizing both primary and secondary data, the research sources original data from the Ekiti State Office of the Surveyor General, which includes boundary point coordinates for three major institutions: Federal Polytechnic Ado Ekiti, Afe Babalola University Ado Ekiti (ABUAD), and Ekiti State University (EKSU). Complementary satellite imagery data were obtained from Landsat 7 ETM (2004), Landsat 8 OLI-TIRS (2014), and Landsat 9 OLI-TRIS (2024), with a resolution of 30 meters. A fundamental aspect is the identification of changes in Land Use and Land Cover (LULC) over time, analyzed through remote sensing and GIS methods using Landsat imagery from the founding years of the campuses. The methodology involved preprocessing steps such as mosaicking and photo editing, followed by image enhancement techniques like histogram equalization. Supervised classification, particularly Maximum Likelihood Classification, was employed to categorize land cover into built-up areas, vegetation, and water bodies across the years 1998, 2004, 2014, and 2024. Buffer zones of one, two, and three kilometers were created around each campus using ArcMap’s "Buffer" feature. The findings reveal that all three campuses significantly influence the local urban landscape, with ABUAD showing the most rapid expansion since its establishment. This study underscores the relationship between campus growth and urbanization dynamics in Ado Ekiti, emphasizing the need for ongoing monitoring and strategies to mitigate the effects of urban expansion in metropolitan areas.
Abstract: This study examines the influence of campus growth on the urbanization of Ado Ekiti, Ekiti State, Nigeria, focusing on metropolitan urban sprawl. Utilizing both primary and secondary data, the research sources original data from the Ekiti State Office of the Surveyor General, which includes boundary point coordinates for three major institutions: F...
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Research Article
Geospatial Based Dam Potential Site Selection in the Catchment Area of Beressa River, Debre Berhan, Ethiopia
Bedasa Asefa*
Issue:
Volume 12, Issue 2, December 2024
Pages:
46-52
Received:
18 October 2024
Accepted:
8 November 2024
Published:
28 November 2024
Abstract: Choosing a suitable site for dam is a crucial phase in dam construction. A successful outcome of this effort is initiated by taking into consideration some watershed properties and characteristics. The objective of this study was to determine suitable sites for dam construction along Beresa River Watershed of Debre Berhan town, Ethiopia. The method used was based on consideration of seven criteria which included topographic factors (slope), geological factors, soil type, catchment size, and land cover, proximity to river and proximity to roads using geospatial tools. Each factor was standardized to a common measurement scale so that the results represent numeric range giving higher values to more suitable and lower values to less suitable attributes. Weighted overlay analysis was applied to obtain layers showing suitable sites for dam construction. The final suitability map of the study area shows that from the total area, 0.53ha (0.01%) was mapped in most suitable, 0.35ha (0.01%) in more suitable, 1.32ha (0.02%) in suitable, 0.33ha (0.01%) in less suitable and 5708.47ha (99.96%) unsuitable for dam site selection and construction. The study proved that, the system will provide reliable and easy system for dam site selection and construction in the study area.
Abstract: Choosing a suitable site for dam is a crucial phase in dam construction. A successful outcome of this effort is initiated by taking into consideration some watershed properties and characteristics. The objective of this study was to determine suitable sites for dam construction along Beresa River Watershed of Debre Berhan town, Ethiopia. The method...
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Research Article
Impact of ENSO on Drought in Borena Zone, Ethiopia
Gezahegn Mergia Tullu*,
Abebe Kebede Habtegebriel,
Komi Mensah Agboka
Issue:
Volume 12, Issue 2, December 2024
Pages:
53-70
Received:
4 December 2024
Accepted:
16 December 2024
Published:
31 December 2024
DOI:
10.11648/j.ajrs.20241202.13
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Abstract: Drought is one of the most frequent natural disasters in the world, droughts has a significantly negative impact on social, economic, and environmental situations. The goal is to assess and define the spatiotemporal analysis of meteorological droughts across ENSO (neutral, El Niño and La Niña) events and provided the guidance of the study area. CHIRPS data gathered from CHG-UCSB for spatial analysis and USGS FEWS NET for temporal analysis, respectively, for the time periods 1981 2020 and 1991–2020. For spatial and temporal analysis SPI was selected due to better for rainfall input over the study area, we employed Python tools and GeoCLIM data analysis methodologies. The findings of this study demonstrate that the Borana zone experienced an increase in droughts during the El Niño, La Niña, and neutral events between 1981 and 2020. The frequency and duration of the dryness were displayed in time steps across short-term drought indices. The extent, duration, and frequency of meteorological (deficit of precipitation) droughts varied, as shown by the time-scale temporal meteorological drought indices in the range of three to twelve months. For the remaining woredas of investigation between the SPI3 and SPI6, SPI6 and SPI12, and SPI9 and SPI12 indices, significantly an increase in the correlation values over short to long durations over the study area was the dominant factor in the meteorological drought severity of the correlation. It is also necessary to conduct additional research on how droughts spread, including the use of various drought indices to gauge the frequency, length, and intensity of droughts over time at the woreda, regional, and national levels. This study will help for different sectors, for knowledge’s and references to better manage irrigation, crop variety selection (drought tolerant seeds), soil conservation, crop production, and better awareness on meteorological droughts over study area.
Abstract: Drought is one of the most frequent natural disasters in the world, droughts has a significantly negative impact on social, economic, and environmental situations. The goal is to assess and define the spatiotemporal analysis of meteorological droughts across ENSO (neutral, El Niño and La Niña) events and provided the guidance of the study area. CHI...
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