Joseph Doetsch

TL;DR: In this paper, an extensive campaign to characterize rock stresses on the decameter scale was carried out in three 18-24m long boreholes drilled from a tunnel in foliated granite at the Grimsel Test Site, Switzerland.

TL;DR: A general workflow to empirically quantify the quality of DAS measurements based on the transfer function between true ground motion and observed DAS waveforms is presented, intended to provide a quantitative assessment of site- and frequency-dependent DAS data that may help establish best practices for upcoming DAS surveys.

TL;DR: In this article, a series of hydrofracturing and overcoring tests were performed to characterize the stress field at the Grimsel Test Site (GTS) underground rock laboratory, and the fracture growth direction from microseismicity is consistent with the principal stress orientations from the overcoring stress tests, provided that an anisotropic elastic model for the rock mass is used in the data inversions.

TL;DR: In this article, a coupling strategy between geophysical and hydrological models that is based on structural similarity constraints is proposed for parameter estimation in groundwater hydrology, where the spatial gradients of the inferred parameter fields are not aligned in parallel, are penalized in the inversion.

TL;DR: In this paper, self-potential mapping and close to two months of SP monitoring on a gravel bar were performed to investigate the origins of SP signals at a restored river section of the Thur River in northeastern Switzerland.