Temperature Effects on Dielectric Constant and Electric Conductivity By Time Domain Reflectometry Under Extreme High Temperature (65 to 95 oC).

Time domain reflectometry (TDR) is widely applied for measuring water content in porous media. TDR has temperature dependency and it depends on the soil texture and temperature. We hope that TDR is applied for measurement in volcanic area and hydrothermal sites where is existing soil  and sediment which is extremely high temperature. We tried to get dielectric constant, electric conductivity, and both waveforms by time domain reflectometry between 65 and 95 ^oC. Dielectric constant showed good agreement with former studies at wide range of soils, temperatures and water contents. However, electric conductivity was confirmed that it decreased and is not able to apply further studies over 85^oC. We suggest new equation soil is from 85 to 95 ^oC.