GNGTS 2024 - Atti del 42° Convegno Nazionale

Session 3.2 GNGTS 2024 Fig 1 Layout of the MS and FW profles in the area of the Cazzaso landslide. In the frst phase, a Mult-Source (MS) Wireless Data Acquisiton was used. MS introduced a new approach for collectng DERT data (LaBrecque et al., 2013). The MS resistvity-meter has the peculiarity to control transmitng (Tx) and receiving (Rx) dipoles with short, isolated wires. It is a modular system based on stand-alone units remotely controlled via radio signals. Modularity eases the use of the system, but the real innovatve and most important feature is its capability of injectng current simultaneously with diferent dipoles. The campaign operatons were preceded by a survey design phase which allowed to optmize the acquisiton geometries. Moreover, a preliminary ERT test allowed to analyze the geophysical response of the subsurface. Then, 4 DERT lines were acquired: 2 lines transverse to the landslide (approximately in the N-S directon), and 2 longitudinal lines (approximately in the E-W directon). This arrangement enabled the investgaton of both the western sector and the central sector of the slope. 16 MS units were used for a total of 48 electrodes placed on the ground. All the surveys were carried out adoptng a in-line quadrupole acquisiton geometry, with both single- and simultaneous mult-source (2 Tx and 4 Tx) transmiters (Bocchia et al., 2021). Further supplementary acquisitons