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Journal of Geoscience and Environment Protection 2023年第1期11卷 127-138页

作者： Ubong E. Essien Akaninyene Okon Akankpo Magnus U. Igboekwe Emmanuel B. Umoren Department of Science Technology Akwa Ibom State Polytechnic Ikot Osurua Nigeria Department of Physics University of Uyo Uyo Nigeria Department of Physics Michael Okpara University of Agriculture Umudike Nigeria

In this work, seismic refraction was used to obtain elastic properties (shear modulus (μ), Young modulus (E), Bulk modulus (K) and lithological information in uyo and its environ as an aid to engineering foundation. Using seismic refraction method, the top and weathered layer of the engineering foundation in the study area was investigated to determine the elastic parameters of top soil and also assess the strength of engineering foundation based on the parameter distribution. A 24-channel signal enhancement seismograph, geophones, sledge hammer and a metal plate (source) for generating seismic waves were used. The study area lies between latitudes 4˚45' and 5˚15'N and between longitudes 7˚45' and 8˚30'E in the Niger Delta region of southern Nigeria. Geologically, the area is located in the Tertiary to Quaternary Coastal Plain Sands (CPS) (otherwise called the Benin Formation) and Alluvium environments of the Niger Delta region of southern Nigeria. Shear Modulus had average values of 0.43 × 108 N/m2 and 1.40 × 108 N/m2 for layers 1 and 2 respectively. The average values of the Young Modulus for layers 1 and 2 were determined as 2.32 × 108 N/m2 and 3.84 × 108 N/m2 respectively. The average values of the bulk Modulus for layers 1 and 2 were estimated as 1.52 × 108 N/m2 and 4.93 × 108 N/m2 respectively.

关键词： uyo Velocity Seismic Refraction Sediments Vp/Vs

Application of Geographic Information System (GIS)in Mapping Groundwater Quality in uyo, Nigeria

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International Journal of Geosciences 2011年第4期2卷 394-397页

作者： Magnus Uzoma Igboekwe Akaninyene Okon Akankpo 不详

In recent years there has been serious concern on the deteriorating groundwater quality due to the activities of man. Geographic Information System (GIS), a high performance computer based tool is playing a critical role in water resource management and pollution study. In this work, the GIS software was used to analyze the effects of various data layers (topographic slope, groundwater table variation, soil porosity and land use activities) on the distribution of groundwater pollution in the Nigerian city of uyo. Spatial variability map of different groundwater quality parameters were generated using interpolation operation in the software. A good correlation exists between some of the pollution indicators (total dissolved solids, TDS and conductiveity, CN, 0.8;chloride and TDS, 0.17 as well as TDS and sulphate, 0.23). The results of spatial variability maps of different groundwater quality parameters indicate an increase in the percentages of pollution levels during the last five years. Cross operation was also used to explain the effects of various data layers viz. topographic slope, groundwater slope, depth to groundwater layer and land use activities on the distribution of groundwater pollution.

关键词： Groundwater Pollution Water Quality GIS uyo Urban

Retail Outlets and City Centrality: Perspectives from a Sub-Saharan African City

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Journal of Geographical Research 2019年第3期2卷 23-29页

作者： Eti-obong Simeon Ema University of uyo Nigeria

Sub-Saharan African cities are uniquely characterized by retail competition influencing outlet *** work focused on revealing retail outlet location in uyo and its relationship with distances from the Central Business *** was measured along the six major arterial roads that link the city to the central business districts by the use of Google Map[5]Distance Calculator and itouch maps[7]*** arteries were divided into four distinct spaces in kilometers namely 0-1km,1-2km,2-3km,*** Outlets were grouped into ten *** was analysed using distance in kilometers from the Central Business District as variable *** independent variables X1,X2,X3,X4,X5 and X6 were the six major arteries represented by the location of each specific retail outlet *** SPSS version 20 software the results reflected centre a 47.9 percent variation in retail outlets location with correlation coefficient(R)of 69.2%revealing a strong relationship between the distances from the Central Business Districts and the location of retail outlets located across the six major arteries.H1 was accepted which states a significant relationship in the location of retail outlets as distance increase from the city centre across the *** confirms a strong intensity of location of retail outlets in the city centre with a gradual decline as distance increase from the *** there was an increase in intensity of retail outlets in junctions away from the Central Business Districts according to multiple nuclei *** is recommended that urban expansion through growth ***:To access the relationship between retail outlets location and distance from central business district in a *** Questions:This work provided answers to the following questions:*** are these retail outlets located in the city space?*** is the relationship between Retail outlets and the distance from the City Centre?Objectives:*** explain the distribu

关键词： Retail outlets Sub-Saharan africa Central business district uyo urban

Monitoring Groundwater Contamination Using Surface Electrical Resistivity and Geochemical Methods

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Journal of Water Resource and Protection 2011年第5期3卷 318-324页

作者： O. Akankpo M. U. Igboekwe 不详

Surface electrical resistivity has been used as a tool in the detection of groundwater contamination. In this work, five geoelectric soundings with two at waste dumpsites have been carried out in uyo, Southwestern Nigeria to map the gross layered structure of the refuse as well as the extent of groundwater contamination. The geology of the area (Benin Formation) mainly consists of fine-medium-coarse grained sands. The data of five Schlumberger Vertical Electrical Soundings (VES), with a maximum of AB/2=500 m, were analyzed using Hemkler computer program. In general, there exists a common feature in the resistivity variation pattern of high-low-high-low-high in the area. The result shows a wide range of resistivity variation ranging from 2.0 to 60700 ?m. Based on the survey results, the resistivity values less than 75 ?m shows contamination due to waste at Eka street and Udo street. Also, the high resistivity value at mechanic village (60700 ?m) may be related to the waste oil deposit due to the automobile repair activities. A comparison of the resistivity values and the curve types at the dumpsites (Eka street and Udo street) and other locations show that the two dumpsites have an H curve type indicating contaminated zones, while other locations have a K curve type indicating non contaminated zones. Hydrochemical analysis of groundwater samples collected in the area was also carried out for some physico-chemical parameters. The results produced higher concentration of conductivity, total dissolved solids and chloride values for water collected at close locations to dumpsites than those far away from the dumpsites: an evidence for a quantitative assessment of groundwater contamination.

关键词： Groundwater uyo Urban Resistivity VES Dumpsites