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.

For details, see the publication:

Salas-Romero, S., Malehmir, A., Snowball, I., & Dessirier, B. (2019). Subsurface characterization of a quick-clay vulnerable area using near-surface geophysics and hydrological modelling. In Solid Earth (Vol. 10, Issue 5, pp. 1685–1705). Copernicus GmbH. https://doi.org/10.5194/se-10-1685-2019

Data use SWEREF99 for x and y coordinates.

Folders and files:

1. Reflection_seismic_2013 - Reflection seismic profiles.

The lines are described in https://doi.org/10.5194/se-10-1685-2019, Figure 2.

2. Modeled_interfaces_xyz - 3-D modelling of the subsurface materials 

	bedrock.txt - the top of the bedrock, as shown in Figure 9b
	bottom_coarse.txt - the bottom of the coarse-grained layer.
	top_coarse.txt - the top of the course-grained layer, as shown in Figure 9a

Columns in these files are x (m), y (m), elevation (m)

3. groundwater_table.txt - Hydrological modelling of the coarse-grained layer

Variables are:
x (m)
y (m)
water_table(masl) - Water table elevation
top_of_layer(masl)
bottom_of_layer(masl)
T(m^2/s) - transmissivity
layer_thickness(m)
q_x(m/s) - x-velocity
q_y(m/s) - y-velocity

4. magnetic_data.txt - Residual magnetic anomaly data, as shown in Figure 11a.

Columns are x (m), y (m), residual magnetic anomaly (nT). 
