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.

中文翻译：

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电阻率在印尼锡后矿山评估地下地质和水文条件中的应用

自殖民时代以来，在东南亚的许多地区都进行了露天水力锡矿开采。不论其规模如何，这种采矿方法都极大地影响了微观形貌，并留下了极度退化的土壤表面，使植被几乎无法生长。因此，寻找一种可行的方法来修复和重新造林这些地区是一个长期的问题。在这项研究中，我们旨在使用电阻率调查结合微地形信息来弄清印尼岛屿锡矿开采现场的地下地质（土壤性质和分布）和水文条件。研究地点的电阻率调查提供了有关基岩，沙质和黏性土壤分布的信息，反映了采矿活动。此外，直接和连续的地下水位监测显示了取决于土壤和气候条件的地下水波动范围。我们的研究表明，通过电阻率调查进行的地下评估可以提供必要的信息，有助于通过改善物理条件和土壤肥力来制定可行的计划，以便在锡后采矿场所进行植树造林或向农田转化的可行方案。