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首页> 外文期刊>Modelling, Measurement & Control. Series C, Energetics, chemistry & chemical engineering, earth resources, environment, biomedical problems >The use of Magnetic and Electrical Resistivity Methods in Groundwater Development of Oba-lle Area, near Akure SW Nigeria and its Environmental Implications
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The use of Magnetic and Electrical Resistivity Methods in Groundwater Development of Oba-lle Area, near Akure SW Nigeria and its Environmental Implications

机译：磁电阻率方法在尼日利亚阿库雷西南部Oba-lle地区地下水开发中的应用及其环境意义

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摘要

The use of magnetic and electrical resistivity methods in understanding the structural setting of Oba-lle area has been established. The magnetic anomaly and isoresistivity maps were interpreted qualitatively, From the magnetic method, magnetic low of negative magnetic values was delineated particularly at the western parts of the area trending NE-SW, NW-SE, and E-W. The isoresistivity maps particularly at "a" =48m, 64m and 96m showed varying resistivity pattern which is diagnostic of the presence of linear structures which coincide with the trend from the magnetic anomaly. Thus, the presence of basement depressions/fractures/faults/lithological contacts/rock boundaries cannot be ruled out. Hydrolithologically, the most prolific unit is the coarse grained sands/gravels of the intermediate layer, the weathered basement particularly when it is underlain by fracture bedrock. The environmental implication arise mainly from the variation in basement aquifer which vary from place to place and at times it may not exist at all, the lithologic sequence above the basement aquifer, productivity/ yield of hand-dug wells particularly during dry season, and its usage.
机译：已经建立了利用磁电阻率方法来理解Oba-lle区域的结构设置的方法。定性解释了磁异常图和等电阻率图。根据磁法，特别是在趋势为NE-SW，NW-SE和E-W的西部地区，描绘出负磁值的磁低。尤其是在“ a” ＝ 48m，64m和96m处的等电阻率图显示出变化的电阻率模式，这诊断了线性结构的存在，该线性结构与来自磁异常的趋势一致。因此，不能排除基底凹陷/裂缝/断层/岩性接触/岩石边界的存在。从水文岩石学的角度来看，最多产的单元是中间层的粗粒沙/砾石，特别是当风化的地下室被裂缝性基岩所覆盖时。对环境的影响主要来自地下蓄水层的变化，这种变化因地而异，有时甚至根本不存在，地下蓄水层上方的岩性层序，特别是在旱季期间，手挖井的生产率/产量及其用法。

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