10th International Workshop on Advanced Ground Penetrating Radar最新文献

{"title":"A Novel Processing Framework for Tree Root Mapping and Density Estimation using Ground Penetrating Radar","authors":"Livia Lantini, F. Tosti, I. Giannakis, Daniel Egyir, A. Benedetto, A. Alani","doi":"10.3997/2214-4609.201902564","DOIUrl":"https://doi.org/10.3997/2214-4609.201902564","url":null,"abstract":"Summary Estimating the root density of mature trees is of high importance as the root system is a robust indicator of both the health status and the structural integrity of a tree. With this in mind, a multi-stage data processing scheme is proposed using Ground Penetrating Radar (GPR) to achieve an effective estimation of the root density of trees. The proposed framework is divided into three main chronological steps. Initially, ringing noise is removed using a Singular Value Decomposition (SVD) filter prior to a frequency-wavenumber (F-K) migration. Subsequently, a tracking algorithm is applied to the processed data in an effort to identify patterns associated with roots. Lastly, the found patterns are expressed as continuous and differentiable functions from which the root density is derived. To demonstrate the viability of the proposed approach, a case study is presented in order to identify the root system and map the overall density of the roots of a mature tree. The algorithm is commercially appealing with minimum computational and operational requirements for large-scale forestry applications.","PeriodicalId":162237,"journal":{"name":"10th International Workshop on Advanced Ground Penetrating Radar","volume":"17 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-09-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131899349","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Advances in the Prediction of the Bearing Capacity of Road Flexible Pavements using GPR","authors":"F. Tosti, L. B. Ciampoli, F. D’Amico, A. Alani","doi":"10.3997/2214-4609.201902574","DOIUrl":"https://doi.org/10.3997/2214-4609.201902574","url":null,"abstract":"Summary This work proposes an experimental-based model for the assessment of the bearing capacity of road-flexible pavements using ground-penetrating radar (GPR - 2 GHz horn antenna) and the Curviameter non-destructive testing (NDT) methods. It is known that the identification of early decay and loss of bearing capacity is a major challenge for effective maintenance of roads and the implementation of pavement management systems (PMSs). To this effect, a time-efficient methodology based on a quantitative modelling of road bearing capacity is developed in this study. The viability of using a GPR system in combination with the Curviameter NDT equipment is also proven.","PeriodicalId":162237,"journal":{"name":"10th International Workshop on Advanced Ground Penetrating Radar","volume":"228 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-09-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121272727","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Using GPR on a problematic agricultural field for groundwater protection in a karst environment","authors":"M. Zajc, J. Urbanc","doi":"10.3997/2214-4609.201902563","DOIUrl":"https://doi.org/10.3997/2214-4609.201902563","url":null,"abstract":"Summary Due to the extreme heterogeneity and increasing importance of karst aquifers as water supply sources and their often inadequate protection strategies, the knowledge of subsurface conditions in such areas is vital for the accurate groundwater vulnerability assessments. The presence of agricultural activity can increase the risk of groundwater pollution, therefore a GPR study was conducted on a problematic agricultural field within a karst aquifer. The use of two different antenna frequencies (250 and 500 MHz) proved useful for detecting different features at different depths. The results show a very thin top soil layer as well as multiple discontinuities and karst features in the shallow subsurface. The combination of both allows for rapid drainage, reduced crop growth as well as increased groundwater pollution risk.","PeriodicalId":162237,"journal":{"name":"10th International Workshop on Advanced Ground Penetrating Radar","volume":"56 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-09-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124654702","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Numerical Modelling of Ground Penetrating Radar for Potash Mine Safety","authors":"Victor Okonkwo, Tokini Briggs, R. Paranjape, M. V. D. Berghe","doi":"10.3997/2214-4609.201902602","DOIUrl":"https://doi.org/10.3997/2214-4609.201902602","url":null,"abstract":"Summary This paper presents a software tool which simulates the geological stratigraphy of a potash mine which is then used with gprMax (public domain Ground Penetrating Radar (GPR) simulation software) to examine and evaluate the effectiveness of auto-picking algorithms. The system is used to simulate the GPR response from clay seams in the roof of potash mining rooms. As it is extremely onerous to obtain in-situ data that captures all possible normal and anomalous geological conditions present in the mine roof, earth models are generated which accurately represents the geology of the mine. In particular, random clays in the mine roof can negatively affect the performance of auto-picking algorithms. These earth model simulations can be used to present these random clays accurately. gprMax is an open source software that simulates Electro-Magnetic (EM) wave propagation in materials in order to support a better understanding of the use of GPR in various applications. Currently, GPR systems are in use in potash mines to assist with monitoring of the roof status of mining rooms. The goal of this paper is to validate the ability of using gprMax with effective earth models to generate realistic GPR signals that are used to test and evaluate auto-picking algorithms. The use of simulated data in comparison to the experimental (actual physical) data and generation of test bed models for an auto-picking algorithm has many benefits. Synthetic data is generated by gprMax using the Finite Difference Time Domain (FDTD) methodology. An effective methodology to develop and test robust auto-picking algorithms is created using simulated GPR signals because the ground truth is known from the earth models. Additionally, in this work results from both an industry standard auto-picking algorithm and a newly developed auto-picking algorithm, called Clustered Ratio Derivative (CRD), are presented for this mine roof monitoring application. Finally, in this work we take advantage of cloud computing resources in order to execute this work.","PeriodicalId":162237,"journal":{"name":"10th International Workshop on Advanced Ground Penetrating Radar","volume":"32 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-09-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121839205","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Laboratory tests in rigid pavement","authors":"Mezgeen A. Rasol, J. Pais, Mercedes Solla Centro, S. Santos-Assunçao, Viviana Sossa, V. P. Gracia","doi":"10.3997/2214-4609.201902575","DOIUrl":"https://doi.org/10.3997/2214-4609.201902575","url":null,"abstract":"Summary Deterioration of concrete structure is consequence of aging, applied loads and weathering. In this paper, several laboratory tests were presented, compared to computational models and a field test case study. The purpose of the laboratory measurements is the analysis of the results in the case of different size cracks in concrete beams, filled with several materials","PeriodicalId":162237,"journal":{"name":"10th International Workshop on Advanced Ground Penetrating Radar","volume":"28 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-09-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133171436","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Investigation of the characteristics of the soil by means of TDR probes: a preliminary work on some future perspectives","authors":"R. Persico, I. Farhat, L. Farrugia, C. Sammut","doi":"10.3997/2214-4609.201902582","DOIUrl":"https://doi.org/10.3997/2214-4609.201902582","url":null,"abstract":"","PeriodicalId":162237,"journal":{"name":"10th International Workshop on Advanced Ground Penetrating Radar","volume":"10 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"117099129","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Field Experiments to Investigate Cross-polarization Characteristics of a Dipole Array Antenna in a Water-filled Borehole","authors":"S. Ebihara, K. Toyozawa, T. Hasegawa","doi":"10.3997/2214-4609.201902583","DOIUrl":"https://doi.org/10.3997/2214-4609.201902583","url":null,"abstract":"","PeriodicalId":162237,"journal":{"name":"10th International Workshop on Advanced Ground Penetrating Radar","volume":"351 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116667098","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Detecting rebar corrosion through complementary GPR and IRT methodologies","authors":"M. Solla, N. Fernández, S. Lagüela, F. J. Vidat","doi":"10.3997/2214-4609.201902589","DOIUrl":"https://doi.org/10.3997/2214-4609.201902589","url":null,"abstract":"","PeriodicalId":162237,"journal":{"name":"10th International Workshop on Advanced Ground Penetrating Radar","volume":"21 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125662050","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Assessment of a stepped-frequency GPR for subsurface drainage mapping for different survey configurations and site conditions","authors":"T. Koganti, E. Vijver, B. Allred, M. Greve, J. Ringgaard, B. V. Iversen","doi":"10.3997/2214-4609.201902566","DOIUrl":"https://doi.org/10.3997/2214-4609.201902566","url":null,"abstract":"","PeriodicalId":162237,"journal":{"name":"10th International Workshop on Advanced Ground Penetrating Radar","volume":"28 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132449929","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Signal Artifacts in GPR Engineering Surveys","authors":"D. Campo","doi":"10.3997/2214-4609.201902570","DOIUrl":"https://doi.org/10.3997/2214-4609.201902570","url":null,"abstract":"","PeriodicalId":162237,"journal":{"name":"10th International Workshop on Advanced Ground Penetrating Radar","volume":"17 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126070464","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}