Sinkhole formation induced by descending groundwater in a karst aquifer near a limestone quarry

IF 2.8 3区 地球科学 Q2 GEOGRAPHY, PHYSICAL
Rungroj Arjwech, Mark E. Everett
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引用次数: 0

Abstract

This study presents case studies conducted in northeast Thailand, where sinkhole collapses have continuously occurred in certain areas. Rapid descent of groundwater in a karst aquifer has the potential to induce sinkhole collapses within the karst morphology. Field investigations have revealed surface expressions of potentially hazardous sinkholes associated with zones of groundwater depression and abandoned groundwater wells. 2D electrical resistivity tomography (ERT) profiles were executed along the trend of such sinkhole collapses. The ERT results were combined to outline potentially dangerous cavities and continuous fractures. Sinkhole collapses in this scenario are primarily induced by groundwater depression and rainfall. Groundwater flows through conduits connecting a quarry with a karst cavern network, and dewatering of the quarry reduces the surrounding groundwater level. Runoff from rainfall percolates within overburden and enters air-filled cavities. Additionally, quarry blasting activities may cause vibrations that trigger the formation of sinkholes. Observations of surficial collapse features were generally consistent with geophysical ERT-interpreted subsurface cavities and fractures. Consequently, implementing regulatory measures to restrict the depth of limestone quarrying that affects groundwater levels may be necessary to prevent sinkhole collapses. The sinkhole formation phenomenon underscores a critical link between groundwater fluctuations and the stability of karst landscapes.

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来源期刊
Earth Surface Processes and Landforms
Earth Surface Processes and Landforms 地学-地球科学综合
CiteScore
6.40
自引率
12.10%
发文量
215
审稿时长
4 months
期刊介绍: Earth Surface Processes and Landforms is an interdisciplinary international journal concerned with: the interactions between surface processes and landforms and landscapes; that lead to physical, chemical and biological changes; and which in turn create; current landscapes and the geological record of past landscapes. Its focus is core to both physical geographical and geological communities, and also the wider geosciences
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