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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 >Groundwater potential of the eastern Kalahari region of South Africa
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Groundwater potential of the eastern Kalahari region of South Africa

机译：南非东部喀拉哈里地区的地下水潜力

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摘要

An integrated approach involving geological, borehole data, hydrogeochemical and environmental isotope analyses was used to determine the groundwater potential of the eastern Kalahari region of South Africa, an area to the west of Mahikeng that stretches northward from the Orange River into Botswana. The total groundwater resource potential for the eastern Kalahari region of South Africa is estimated at 10127 Mm~3/a, with the Kalahari Group aquifer showing the greatest potential, comprising 51% of the total resource. The storage capacity of the Kalahari Group aquifer (7130Mm~3) is also impressive, estimated to be more than twice that of the dolomite aquifer (2728 Mm~3). Despite having such great potential, the aquifer is not actively recharged and is often associated with very saline water that is not suitable for human and livestock consumption. The limestone and dolomite aquifers of the Campbell Rand Subgroup, as well as the weathered granitic rocks of the Archaean basement, are considered as the most prospective water bearing formations, with a groundwater resource potential estimate of 1981Mm~3/a and 1845Mm~3/a, respectively. Aquifers with the least potential in the project area comprise the fractured basement rocks of the Kraaipan - Amalia greenstone belt, with a groundwater resource potential of 26 Mm~3/a, and the fractured sedimentary rocks of the Asbestos Hills Subgroup, with a groundwater resource potential of 108 Mm~3/a. The calculated groundwater storage and resource potential in the eastern Kalahari region of South Africa satisfies a large proportion of the water demand in the region.
机译：使用涉及地质，钻孔数据，水文地质和环境同位素分析的综合方法来确定南非东部的地下水潜力，南非东部的地区，是Mahikeng西部的区域，从橙河到博茨瓦纳向北伸展。南非东部卡拉哈里地区的地下水资源潜力估计为10127 mm〜3 / a，Kalahari集团含水层显示出最大的潜力，包括总资源的51％。 Kalahari Group Aquifer（7130mm〜3）的存储容量也令人印象深刻，估计是白云石含水层的两倍（2728 mm〜3）。尽管具有如此巨大的潜力，但含水层不会积极充电，并且通常与非常适合人类和牲畜消费的盐水有关。 Campbell Rand子组的石灰石和白云石含水层以及拱形地下室的风化花岗岩，被认为是最前景的水轴承结构，地下水资源潜力估计为1981mm〜3 / a和1845mm〜3 /一个分别。项目区内最少潜力的含水层包括Kraaipan - Amalia Greenstone皮带的破裂地下室岩石，地下水资源潜力为26 mm〜3 / a，以及石棉丘陵群的骨折沉积岩，具有地下水资源电位为108 mm〜3 / a。南非东部Kalahari地区的计算地下水储存和资源潜力满足了该地区的较大比例的水需求。

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