Land reflection seismic, hydrogeological and magnetic study of an area prone to quick-clay landslides in southwest Sweden - Hydrogeological modeling of an area prone to quick-clay landslides in southwest Sweden

Quick-clay landslides are common geohazards in Nordic countries and Canada. The presence of potential quick clays is confirmed using geotechnical investigations, but near-surface geophysical methods, such as seismic and resistivity surveys, can also help identifying coarse-grained materials associated to the development of quick clays. We present the results of four reflection seismic profiles next to the Göta River in Sweden, along which many quick-clay landslide scars exist. An extensive coarse-grained layer exists in the sedimentary sequence and is interpreted and modeled in a regional context. Hydrological modeling of the coarse-grained layer is performed. Magnetic data are also studied within this investigation.

灵敏黏土滑坡（Quick-clay landslides）是北欧国家及加拿大常见的地质灾害。潜在灵敏黏土的存在需通过岩土工程勘察予以确认，但近地表地球物理方法（如地震与电阻率勘探）亦可助力识别与灵敏黏土发育相关的粗粒材料。本文呈现了瑞典约塔河（Göta River）沿岸四条反射地震剖面的研究结果，该区域分布有大量灵敏黏土滑坡痕迹。沉积序列中存在一层广泛分布的粗粒层，我们已在区域背景下对其进行解译与建模。此外，还针对该粗粒层开展了水文建模，并对磁法数据进行了分析。