The purpose of this study is to compare the weekly discharge rate of two solar batteries commonly used in Anambra State. The batteries considered were the Indian made battery with specification Luminous, Deep cycle sealed maintenance free batteries solar application, Lum 12V 100Ah 20hr and 3DGP161433 and Chinese made battery with specification Sun-Test std gel battery, 12V-100Ah, 010716w, Cycle use 14.4-15.0V, Stand by use; 13.5-13.8V and Initial current: less than 30A were used to power 2 stand-alone security lights at the Faculty of Physical Sciences, Nnamdi Azikiwe University, Awka. The technical assessment was based on measuring their output voltages bihourly from 19.00 hr to 7.00 hr and estimation of weekly discharge rate of these batteries for a period of two months (eight weeks). From the analysis, the Indian made solar battery has insignificant discharge tendency for the first eight weeks of its use having its discharge rate of -0.034, -0.038, -0.042, -0.037, -0.039, -0.038, -0.039 and -0.036 Volts/hr per week from week one to week eight respectively whereas the Chinese made solar battery has a relatively high discharge rate of Voltage/hr per week within the first eight weeks of its use having its rate at  -0.095, -0.213, -0.103, -0.1, -0.104, -0.1, -0.083 and -0.109Volt/hr per week from week one to week eight. Also, while the Indian made battery is observed to be relatively stable, the Chinese made battery was observed to be very erratic and highly susceptible to discharge within the first eight weeks (two months) of its use. Hence, it is concluded that Indian made battery is preferred to that of Chinese made battery for optimal performance of stand-alone PV syste.

Geophysical and Geotechnical surveys were integrally carried out at a proposed Judiciary site for civil development of superstructures in Nkpologwu, Anambra Basin, Southeastern Nigeria. Nkpologwu falls within 7 ̊06̍ '40” E to 7 ̊08 ' 42” E longitudes and 5 ̊56' 76” N to 5 ̊57' 78” N latitudes at about 320 m above the mean sea level. The study is aimed at interpreting the lithology of the subsurface at shallow depths in order to accentuate the competence of soil formations at the foundation depths of the site. Vertical Electrical Sounding (VES) data were acquired in the geophysical survey while various geotechnical tests were carried out to ascertain the bearing capacity of the site’s subsoil. The registered data from the VES survey were processed with WINGLET software hence, geoelectric models of at least four layers were obtained. Characterized by apparent resistivity values in the range of about 1524 to 96,561 Ωm. Geotechnical results showed values of 10.4% to 12.4% OMC, 1.95 to 2.01g/cm3 MDD, 30.0 to 39.0% CBR, 21.0 to 30.5% particle size distribution, <12% PI and <35%  LL Atterberg limit for soil samples within foundation depths at the site. Combined interpretation of the surveys showed that at foundation depths at the site were predominantly sand, laterite and sandstones delineated and these were found to meet the required standard of the Federal Ministry of works and housing for construction of superstructures. Therefore, the study provides the knowledge of the lithology and soil competence at foundation depths for future civil construction works at the site.

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This paper adopts two magnetic filtration techniques to enhance the Aeromagnetic maps of Nkalagu and Abakaliki regions of lower Benue trough, Southeastern Nigeria. This aim is to enhance the effectiveness of the map in characterizing the study area. Upward continuation (UPC) and reduction to magnetic equator (RTE) filters were applied to sufficiently improve the interpretation of the aeromagnetic data of the area in terms of recognition and understanding depth continuation and discrimination between shallow and deeper magnetic sources within the study area. The total magnetic intensity and reduction to the equator showed variations in anomalies. The variations were invariably related to magnetic susceptibility, depth, degree of strike, lithology or basement complex rocks harboring varying amounts of magnetic minerals.