The feasibility of socio cultural fishing in any fluviatile lake strongly depends on water and fluid mud depths of the lake. In this study, the suitability of Lake Mbemun for a socio cultural fishing festival has been examined. Using the data obtained from hydrographic survey, Bathymetric and fluid mud depth maps of the lake for March 2016 were prepared. Both maps were used for hydro geomorphologic analyses of the lake. Results showed that the lake had a fetch of 2.95 km, a maximum width of 2.01 km and a surface area of 3.65 km2, making it widely opened to wind and waves impacts which in turn enhance water mixing and sediment focusing. The lake was also found to be generally shallow with a mean depth of 0.81 m, a depth indicator of 1.48 and a relative depth of 0.06%. It’s Shoreline Development Index (1.5) indicates its crenulated state which reflects the potentials for development of littoral communities (plants) and high biological productivity. But with fluid mud depths ranging from 0.44 m to 1.26 m in most parts of the lake, it was considered very muddy and unsuitable for a socio-cultural fishing festival. Therefore, Dredging of the lake is recommended for suitable socio-cultural use.
The contamination of agricultural soils by the toxic trace metals arsenic (As), lead (Pb), cadmium (Cd), chromium (Cr), copper (Cu) and zinc (Zn) was investigated in an industrial district in Vietnam. In this district, irrigation agriculture is conducted via channels; additionally, there are two industrial parks on nearby agricultural land. The purpose of the study was to clarify the magnitude and spatial distribution the trace metal concentrations, the source of the trace metals, the difference was in concentration between the two industrial park areas, and the usability of the soils for agriculture. In this study, eighteen soil samples were taken, and the trace toxic metals in soils were determined using atomic absorption spectrometer. Our results showed that the trace metal concentrations were in the order of Cr > Zn > Pb > Cu > As > Cd for the district. No significant differences were observed between the two park areas in terms of concentration. Cr and Zn concentrations were highest near the factories in the park areas, and the other trace metals were also comparatively high in these areas, demonstrating that the trace metals originated from the factories via wastewater. The correlations observed in the concentrations between the Cd, Pb and Zn, Cr and Zn, and Cu and As suggested that there were several sources of wastewater supplying the trace metals. Concentrations of all trace metals exceeded the permissible level for agricultural soils; therefore, remediation measures are necessary to reduce contamination.
The aim of the study is to identify and record the taxonomic notes on species of Genus Globigerinoides from the study area located in Kafe field of the offshore western Niger Delta area of Nigeria. 550 ditch cuttings samples were retrieved at 18.29 metres intervals from the five wells studied (Kafe-1, Kafe-2, Kafe-4, Kafe-5 and Kafe-6). The standard micropaleontological preparation technique for foraminiferal samples was employed. The foraminiferal contents were identified under binocular microscope and recorded. The species of the Genus Globigerinoides identified are Globigerinoides obliquus BOLLI, Globigerinoides extremus BOLLI and BERMUDEZ, Globigerinoides quadrilobatus D’ORBIGNY, Globigerinoides subquadrilobatus (BRÖNNIMANN), Globigerinoides trilobus REUSS and Globigerinoides sacculifer BRADY and their taxonomic notes were documented accordingly.
The outcropping sediments along Imiegba road have been studied using their sedimentological and organic geochemical (Total organic carbon, TOC and Soluble organic matter, SOM) parameters. A total of sixteen (16) samples were collected and analyzed for the study. Based on sedimentological and field evidences, the main lithofacies identified from the study area are sandstone, shale and claystone. The sandstones are fine to medium-grained and friable. Also the result of the textural analyses show that the sandstones are sub-rounded, moderately to poorly sorted, strongly coarsely skewed and mesokurtic. The calculated permeability values ranging from 307.18-724.85 Md showed that they possess good permeability. Based on the high permeability values of the sands, the sandstones were inferred as good to excellent potentials for fluid transmission making them good reservoir for hydrocarbon.
The TOC values range from 0.17-1.42 wt.(%) with most of the samples above the threshold of 0.5 wt.% while the SOM, greater than 500ppm indicates that the shales have poor to good organic matter quantity and in adequate concentration for petroleum generation if other factors are suitable.
This study evaluated the structural competence of the subsurface geological materials around Led School Area in Bishini, NW Nigeria to delineate the area that is suitable for building development. Twenty Seven vertical electrical soundings (VES) points were occupied in the study area employing ABEM Terrameter SAS 300C with Schlumberger electrode configuration of maximum electrode separation AB/2=150 m. The field resistivity data were interpreted using Win RESIST software. The results from the 2-D interpretation of the VES data were used to prepare the geoelectric sections along four cross sections. The interpreted results showed that the geoelectric sections consist of three to five layers, which are: Top soil, Laterite, Lateritic clay, weathered layer and Fresh basement. The resistivity value and subsurface layer thickness for the top soil varied from 191.7 Ω m to 8146 Ωm and 0.3 m to 7.0 m respectively. The Laterite layer had resistivity values ranging from 1000 Ωm to 1627.3 Ωm and thickness between 1.8 m and 2.5 m. The weathered layer resistivity varied from 33.5 Ω m to 850 Ω m with thickness of 3.6 m to 44 m. The bedrock resistivity ranged from 1238.3 Ωm to 33438.6 Ωm. Geoelectric sections along profile 4 and 1 revealed the thinnest sequence of loose overburden materials and fresh basement at the shallowest depth. The area covered by these profiles is suitable for building development. Building development should not be located along profiles 2 and 3 due to relatively thick weathered layer. However the area may be considered for citing borehole to harness its groundwater potentials.