Application of electrical resistivity to assess subsurface geological and hydrological conditions at post‐tin mining sites in Indonesia
Application of electrical resistivity to assess subsurface geological and hydrological conditions at post‐tin mining sites in Indonesia
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DOI：
10.1002/ldr.3527
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发表时间：
2020-02
影响因子：
4.7
通讯作者：
Masayuki Itoh;T. Matsubara;S. Shiodera;K. Iizuka;K. Sakurai;Y. Nakajima;Hiroki Ohashi;Ivan Manalu
中科院分区：
文献类型：
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作者：
Masayuki Itoh;T. Matsubara;S. Shiodera;K. Iizuka;K. Sakurai;Y. Nakajima;Hiroki Ohashi;Ivan Manalu
在东南亚许多地区，自殖民时代以来，就一直在进行露天水力锡矿开采。无论规模大小，这种采矿方法都严重影响了微地形，留下了极其退化的土壤表面，那里的植被几乎不能生长。因此，确定一种可行的方法来恢复和重新造林这些地区是一个长期的问题。在这项研究中，我们旨在利用电阻率测量结合微地形信息来澄清印度尼西亚岛屿上一个后锡矿开采点的地下地质(土壤特性和分布)和水文条件。研究地点的电阻率测量提供了有关基岩和砂质和粘性土壤分布的信息，反映了采矿活动。此外，直接和连续的地下水位监测显示了地下水的波动幅度取决于土壤和气候条件。我们的研究表明，通过电阻率测量进行地下评估可以提供必要的信息，有助于制定可行的计划，通过改善物理条件和土壤肥力来重新造林或改造锡矿后遗址的农用地。
In many parts of Southeast Asia, opencast hydraulic tin mining has been carried out since the colonial era. Regardless of its scale, this mining method has significantly affected microtopography and left extremely degraded soil surfaces, where vegetation can hardly grow. Therefore, the identification of a feasible method for the rehabilitation and reforesting of these areas is a long‐term issue. In this study, we aimed to clarify the subsurface geological (soil properties and distribution) and hydrological conditions at a post‐tin mining site on an Indonesian island using an electrical resistivity survey combined with microtopographic information. The electrical resistivity survey of the study site provided information about the distribution of bedrock and sandy and clayey soils, reflecting mining activities. Furthermore, direct and continuous groundwater level monitoring showed the ranges of groundwater fluctuation depending on the soil and climate conditions. Our study demonstrates that subsurface assessment by electrical resistivity survey can provide essential information, contributing to the development of feasible plans for reforestation or transformation to agricultural land at post‐tin mining sites through the improvement of physical conditions and soil fertility.