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Barrier spits are geological young, highly dynamic and represent a complex coastal system that includes a number of different but closely related sedimentary depositional environments and geomorphologic elements of varying origin, genesis and evolution. The stratification of coastal barriers is mainly investigated by using borehole data. Therefore, the processes of evolution and the internal structure...
GPR models are instrumental in improving procedures of signal processing and developing indicators for GPR data interpretation. The paper presents GPR models of basic types of geostructural discontinuities in alluvial placers of Yakutia. Frozen rock massif of placer deposits is characterized by layered structure and includes discontinuities related to disturbance of rock, relict streams, and boulder...
The possibility of using the variance amplitude of GPR signal has been considered for investigating the structural features of the geological environments of permafrost. The variance values of the investigated GPR data of the properties and the state of soil areas of alluvial gold and diamonds in Yakutia province in Siberia have been calculated. It is established that the increase of the variance...
3D GPR surveys in the covered karst terrain of west-central Florida, USA, reveal surprising geometries of surficial sediments. Several meters of surficial sands overlie progressively more clay-rich sediments, which in turn overlie weathered limestone. The top of a clay-rich horizon produces an exceptionally clear GPR reflector visible from depths between 0.5 and ∼8 meters. The geometry of this horizon...
The aim of the study is to reconstruct the landscape development on the seaward side of the North-Frisian Island of Amrum. An integrated approach using GPR and sedimentological analyses of shallow sediment cores drilled at selected sites along the radar profiles has been applied. Based on these data a sedimentary model was generated that describes the landscape development on the seaward side of the...
Large scale sinking (ca. 15 m) of lake deposits within the Parangueo maar crater (México) has been observed after drying of its perennial lake in the mid 1980's. Deformation is characterized by a main ring-shaped normal fault accompanied by gravitational sliding and gliding of mud blocks, and folding at the foot of the slides. Domes, caused by mud injections triggered by overpressure, are associated...
Coastal geology in Barcelona City is formed by Quaternary sediments overlying Tertiary strata. The Quaternary plane is crossed by paleochannels and streams, all of them under the city structures and constructions. Boreholes demonstrate differences in the grain size distribution of the materials from the different geological structures. In this work, Ground-penetrating radar was proved as a tool to...
In the vadose zone, soil has become an object of research due to its importance for environmental issues. Description and estimation of the mixed soil water content or dielectric parameter is the essential condition and the key to improving soil investigation with GPR detection. In this paper, first of all, a way to describe 3D random media which the preferred orientation of the multi-scale inhomogeneity...
The 19th century restoration works of the Basilica of Sant'Andrea in Mantua consisted of important modifications of pronaos and facade. According to historical documents, the use of metal reinforcements was planned to tie the facade with the counter-facade but designs and details are missing and since no external evidences of the tie-rods can be observed, the existence of these reinforcements was...
Use of monitoring tools becomes more and more relevant at the increase of the ageing of heritage and historical infrastructures in order to properly drive the management and conservation procedures. In this framework; GPR method, and micro confocal Raman spectroscopy (CRS) methods were used in Keciova (Ketchaoua) Mosque (Casbah, Algeria) in order to visualize historical remains, foundations and basement...
Ground Penetrating Radar (GPR) has widely been accepted in geoengineering, and recently, many successful applications are reported in archaeological survey. After the East Japan great earthquake and tsunami 2011 which killed more than 15,000 and many houses must be relocated from seashore to inland, and we have many demands of archaeological surveys. In order to solve this problem, we have developed...
This paper illustrates clutter reduction in stepped-frequency ground penetrating radar (SFGPR) data for anti-personal landmines detection. Ground reflected clutter is often a performance limiting factor in ground-penetrating radar (GPR) detection of near-surface targets including antipersonnel mines. In this paper the independent factor analysis (IFA), as a method for blind source separation, is used...
A big fragment of Chelyabinsk meteorite (February 15, 2013) fell to the western part of Chebarkul Lake, South Ural, Russia, making a breach in the ice cover. Field measurements done during March 12–14, 2013 revealed a steep dip of the hard bottom, west of the ice-hole. This bottom anomaly, accompanied by a local perturbation of the lower ice surface, has been interpreted as the meteorite impact site...
Analysis of critical conditions on the spacecrafts Columbia (USA), and the Buran (Russia) related to defects in insulation and heat-protection coatings have been performed. It is shown that the existing methods of non-destructive testing, including ultrasound, failed to prevent the disaster of the Space Shuttle Columbia and serious incidents involving spacecraft Buran during its only flight. A new...
Over the last few years ground-penetrating radar (GPR) has proved to be an effective instrument for pavement applications spanning from physical to geometrical inspections of roads. In this paper, the new challenge of inferring mechanical properties of road pavements and materials from their dielectric characteristics was investigated. A pulsed GPR system with ground-coupled antennas, 600 MHz and...
The increasing amount of subsurface infrastructure requires a large number of excavation works on existing roads and pavements. After the completion of such work and the reconditioning of the pavement surface, cracks and other pavement damage can be observed in many cases. A relationship between excavation work and subsequent damages has been suggested. In a study aiming at an evaluation of a possible...
The condition of roads and pavements near their surfaces is of interest to asset management, in particular of the roads and pavement assets, but also of assets buried under the roads or pavements such as cables or pipes. In many cases the decay of the near surface material results in small air or water filled regions within the tarmac/concrete/stone structure. The decay causes little change in the...
Ground penetrating radar (GPR) is widely used in the field of civil engineering, as a non-intrusive technique for road and pavement monitoring. This work presents an innovative application for mobile platforms (smartphones and tablets) for real-time GPR data processing. Our work aims at providing a useful support for engineers and technicians as well, for road and pavement inspection. According to...
Based on the operational principles of ground penetrating radar (GPR) and the practical demanding of well prospecting, we designed an integrated borehole radar system which is assembled by antennas, transmitter, receiving system, and ground data processing sections. The transmission signal of this system is nanosecond, and the frequency of echo signal is high. It requires that, when the real-time...
A conventional GPR system includes PC, network analyzer, rectangular coordinates robot and a single antenna for transmission and reception, resulting in a response only to Co-Polarization signal. However, we expect that more polarimetric information can be obtained. So we developed a full-polarimetric GPR system including PC, network analyzer, position controller, switch driver and polarimetric antenna...
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