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首页> 外文期刊>South African Journal of Geology: Being the Transaction of the Geological Society of South African: Syndie die Verhandelinge van die Geologiese Vereniging van Suid-Afrika >Development of a conceptual geohydrological model for a fractured rock aquifer in the Karoo, near Sutherland, South Africa
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Development of a conceptual geohydrological model for a fractured rock aquifer in the Karoo, near Sutherland, South Africa

机译：在南非南非萨尔堡附近的卡卢裂缝岩土含水层概念性地质水上文献的发展

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摘要

An aquifer in the semi-arid environment of Sutherland, South Africa is examined. The characterization of the saturated geological unit was completed by mapping associated dolerite dykes and fractured outcrops of Beaufort Group sedimentary rocks. This was complimented by pumping tests in order to better understand the fracture connectivity that was found to decrease with distance from a prominent dyke. Groundwater samples and precipitation samples in the study area were analysed for stable isotopes. Drill chips of selected boreholes were examined in order to also better understand the nature of the subsurface at the contact of the dolerite and a suspected subsurface feature identified through satellite imagery. The results are combined into a conceptual geohydrological model to gain insight into the groundwater flow dynamics of the area. Findings suggest preferential recharge occurs in the study area with higher hydraulic infiltration related to the river beds and fracture sets in the study area.
机译：审查了南非Sutherland的半干旱环境中的含水层。通过绘制相关的Dolerite Dykes和Beaufort组沉积岩体的裂缝露头来完成饱和地质单元的表征。通过泵送测试，为了更好地了解发现的裂缝连通性，从突出的堤坝的距离变得更好地减少。分析研究区域的地下水样品和降水样品用于稳定同位素。检查所选钻孔的钻芯片，以更好地了解Dolerite和通过卫星图像识别的疑似地下特征的地下表面的性质。结果组合成概念性地养殖模型，以深入了解该地区的地下水流动动态。调查结果表明，在研究区内有较高的液压渗透和研究区的骨折液体渗透的研究领域发生的优先补给。

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