Geophysical research on the interplays between soil-rock variability and hydrogeological structures: a case study

IF 1.3 4区 工程技术 Q3 ENGINEERING, GEOLOGICAL Quarterly Journal of Engineering Geology and Hydrogeology Pub Date : 2023-11-13 DOI:10.1144/qjegh2023-100
Adedibu Sunny Akingboye
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Abstract

Understanding the spatial variations in soil-rock profiles is crucial for identifying weathered rock layers and mapping geological structures, particularly in the complex feldspar-rich granitic terrain of Penang Island, Malaysia. This study employs a combination of electrical resistivity and seismic refraction tomographic techniques, along with borehole lithological data, in three distinct areas on the island. Its goal is to provide insights into surficial and subsurface soil-rock properties and water-bearing structures within the North Penang Pluton (including a part of the Sungai Ara axis) for sustainable groundwater development, addressing the region's growing population's needs. The research identifies three distinct geological units near the surface: residual soils, highly to moderately weathered/fractured granitic layers, and fresh bedrock, each with its hydrogeological properties. Promisingly, the weathered layers offer significant groundwater development potential, with deep-weathered and potentially fractured zones exceeding 30 meters in the study area. These findings have substantial implications for sustainable groundwater development, especially in tropical hard-rock terrains. Additionally, the study underscores the limitations of small geophysical spacings for probing deeper groundwater resources. This knowledge is essential for informed decision-making in water resource management and infrastructure development, addressing the ongoing global challenge of ensuring access to clean water resources amid population growth.
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土壤-岩石变异性与水文地质构造相互作用的地球物理研究:一个案例研究
了解土壤-岩石剖面的空间变化对于识别风化岩层和绘制地质结构至关重要,特别是在马来西亚槟城岛复杂的富含长石的花岗岩地形中。这项研究结合了电阻率和地震折射层析成像技术,以及井眼岩性数据,在岛上的三个不同区域进行了研究。其目标是深入了解北槟城岩体(包括Sungai Ara轴的一部分)的地表和地下土壤-岩石特性和含水结构,以实现可持续的地下水开发,解决该地区不断增长的人口需求。该研究确定了地表附近的三个不同的地质单元:残余土壤,高度到中度风化/断裂的花岗岩层和新鲜基岩,每个都有其水文地质特性。值得期待的是,风化层提供了巨大的地下水开发潜力,研究区内有超过30米的深层风化和潜在裂缝带。这些发现对可持续的地下水开发具有重大意义,特别是在热带硬岩地区。此外,该研究还强调了勘探深层地下水资源的小地球物理空间的局限性。这一知识对于水资源管理和基础设施发展的明智决策至关重要,有助于解决在人口增长的情况下确保获得清洁水资源的持续全球挑战。
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来源期刊
CiteScore
3.40
自引率
14.30%
发文量
66
审稿时长
6 months
期刊介绍: Quarterly Journal of Engineering Geology and Hydrogeology is owned by the Geological Society of London and published by the Geological Society Publishing House. Quarterly Journal of Engineering Geology & Hydrogeology (QJEGH) is an established peer reviewed international journal featuring papers on geology as applied to civil engineering mining practice and water resources. Papers are invited from, and about, all areas of the world on engineering geology and hydrogeology topics. This includes but is not limited to: applied geophysics, engineering geomorphology, environmental geology, hydrogeology, groundwater quality, ground source heat, contaminated land, waste management, land use planning, geotechnics, rock mechanics, geomaterials and geological hazards. The journal publishes the prestigious Glossop and Ineson lectures, research papers, case studies, review articles, technical notes, photographic features, thematic sets, discussion papers, editorial opinion and book reviews.
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