Electrical resistivity tomography (ERT) surveys were conducted at the Velika Pećina near Kličevica and Romuald's Cave sites in Croatia in 2014 and 2015. The goal of the surveys was to estimate sediment depth to bedrock. However, neither survey produced reliable results at the 0.5 m probe spacing. In 2017, the Romuald's Cave site was revisited utilizing a high data density survey of 0.1 m probe spacing. All three surveys were conducted with a GeoScan RM85 in a pole–pole configuration. The high data density survey produced reliable results given the subsurface information available from three excavation trenches in the first chamber of the cave. The 2015 and 2017 ERT survey results are presented along with the results from two additional high data density ERT surveys located in the back chamber of Romuald's Cave. These results suggest that utilizing high data densities may improve the reliability of ERT surveys in cave environments.

中文翻译：

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高数据密度电阻层析成像调查，用于估算Romuald洞穴的沉积物深度

电阻层析成像（ERT）调查于2014年和2015年在克罗地亚的克利切维察附近的VelikaPećina和Romuald's Cave地点进行。调查的目的是估计沉积物至基岩的深度。但是，在0.5 m的探头间距下，两项调查均未产生可靠的结果。2017年，利用0.1 m探头间距的高数据密度调查重新访问了Romuald's Cave站点。所有这三个调查都是使用极对极配置的GeoScan RM85进行的。鉴于洞穴第一个洞室中的三个开挖沟槽提供的地下信息，高数据密度调查产生了可靠的结果。展示了2015年和2017年的ERT调查结果以及位于Romuald洞穴后室的两次额外的高数据密度ERT调查结果。