METHOD FOR MONITORING AND FORECASTING LANDSLIDE HAZARD Russian patent published in 2019 - IPC G01V3/12 

FIELD: geophysics.

SUBSTANCE: invention relates to geophysics and can be used for monitoring and prediction of landslide hazard. Essence: profiled lines are laid on controlled landsliding section. Observing points are arranged along profile lines with parameters of natural pulsed electromagnetic field of the Earth (NPEMEF). Points of reference observations with NPEMEF recorders are placed outside the controlled landslip section in areas with a stable background of the NPEMEF daily course. At the monitored section, the parameters of the magnetic component of the NPEMEF are continuously monitored with periodic reading of the magnetic component parameters of the NPEMEF relative to the similar background parameters of the NPEMEF, the level of which is controlled by the reference observation points. Signal is recorded at frequency of 5–25 kHz using active second-order filters which enable to be tuned from technogenic interference fields. Current geodynamic state of the landslide slope is determined from the parameters of the magnetic component of the NPEMEF on the controlled landsliding section. Then, magnetic component parameters of the NPEMEF are analyzed for two orthogonal components (Hx, Hy) in two directions of signal reception. Change in parameters of at least one of the components relative the background parameters is used to determine the change in the state of the landslide slope on the controlled landsliding section and the degree of landslide hazard. At that, monitoring of magnetic component parameters of NPEMEF is performed in the form of recording of intensity of pulse flow of NPEMEF.

EFFECT: high accuracy of prediction of landslide hazard.

6 cl, 14 dwg