Multi-frequency effect towards High Conductivity Overburden Responses using Horizontal Coplanar (HCP) coil configuration for Landslide Hazard Instrumentation

11th Aceh International Workshop and Expo on Sustainable Tsunami Disaster Recovery

Bukhari, Bukhari^1^2 ; Syukri Surbakti, Muhammad^1 ; Ismail, Nazli^1 ; Idris, Nasrullah^1 ; Yusibani, Elin^1 ; Isa, Muhammad^1 ; Syahreza, Saumi^1^3

Department of Physics, Faculty of Mathematics and Natural Sciences, Universitas Syiah Kuala, Banda Aceh

23111, Indonesia^1

Doctorate Program of Mathematics and Applied Science (DMAS), Postgraduate Program, Universitas Syiah Kuala, Banda Aceh

23111, Indonesia^2

Tsunami and Disaster Mitigation Research Center (TDMRC), Universitas Syiah Kuala, Banda Aceh

23111, Indonesia^3

关键词: Coaxial configuration;    Coil configurations;    Computer screens;    Electromagnetic methods;    High conductivity;    Landslide hazard;    Natural disasters;    Response amplitudes;   

Others  :  https://iopscience.iop.org/article/10.1088/1755-1315/273/1/012022/pdf
DOI  :  10.1088/1755-1315/273/1/012022

来源: IOP

【 摘 要 】

The instrumentation for the sensing of natural disaster phenomena as like as landslide instrumentation has acquired great importance for the instrumentation community. The novel instrumentation for landslide application has been made and calibrated using Horizontal Coplanar (HCP) coil orientation. The early instrumentation for landslide slopes was gradually equipped with standard and automatic instrumentation consisting of three the piezometric cells, two deep-seated steel wire extensometers, four in clinometric tubes, a rainfall gauge, a snow gauge and an air thermometer. This novel instrumentation works in electromagnetic methods similar with electromagnetic methods in geophysics. HCP coil orientation is a coplanar array where both coils are horizontal. In HCP, the depth of sounding is about 1.5 times of the coils separation which have maximum coupled configuration (HCP, VCP, and Vertical Coaxial configuration). The overburden response had inverted the percent value of maximum negative response then there were three maximum response amplitude peaks. Measurement and data processing were performed using a computer through Delphi program. The diagonal cross sections of the overburden as the centre were the maximum value of inverted response of anomaly positions. In aluminium thin plate overburden, the diagonal cross section point as the overburden centre was the maximum value of inverting value of the highest minimum response amplitude. The measurement graphic in the computer screen with several types of overburdens would be displayed. As the result, that the overburden widths for overburden were determined by subtracted of two turning points positions. The overburden positions were accurate for Type P overburden. The master curve had a high anomaly contrasts with two of positive anomaly peaks. Otherwise, the anomaly positions were between two of the negative anomaly peaks.