Study On The Characteristics Of The GPR Signal Response In The Moisture Content Of Soil

It is obviously important to explore the distribution of soil moisture content in order to provide a better basis for farmland irrigation technology and desertification control.Compared with other prospecting methods,the ground penetrating radar(GPR)can be used to detect soil moisture content,which can be used to highlight the advantages of high resolution,high efficiency and high efficiency,The application of GPR to detect soil moisture content has become a new research direction in recent years.Based on the FDTD,different water rich formation models are established.The response characteristics of radar signals in time-frequency domain are analyzed.According to the different detection methods of radar for the detection of water bearing soil,the research show that the radar synchronization method has better detection effect.At the same time,radar wave field used analyzed the soil moisture influence on particle sizeand water bearing structure.analysis shows that,in a certain size,water particle size on the radar signal will greatly influence to radar wave field.Frequency domain analysis of GPR signals can be found that the different Watery medium have obvious difference in the Spectrogram;for power spectrum analysis combining with classical and modern power spectrum analysis,the target ROI is extracted,and the distribution of water-rich strata is discriminated by the target signal power spectrum statistic;In spectrum power analysis,the spectrum power coefficient combined with wavelet analysis getting 3D spectrum power analysis picture,The existing state to explain the abnormal water bearing body three-dimensional water soil general map is more intuitive.Taking into account the electromagnetic wave propagation in the underground aquifer the whose high frequency component attenuation apace,that led to the resolution of the GPR will be decreased with increasing depth,In this paper,the spectrum equalization technology based on S transform give a correction,and the correction effect is good.then,In order to better verifying the validity of the interpretation method,the physical model test of isolated anomaly geological model were designed matching abnormal geological model of numerical simulation.explaining results show that the method proposed time-frequency interpretation method can improve the interpretation effect of valid data.Based on the above research,the relationship between moisture content of The formation and the GPR signal is obtained.However,theoretical and practical...