Magnetic survey – ground technology, aeromagnetic survey on aircraft and unmanned aerial vehicles: a comparative analysis of the results (on the example of Eastern Transbaikalia)

2020 ◽  
Vol 26 (8) ◽  
pp. 6-15
Author(s):  
R. Gruzdev ◽  
Keyword(s):  
Unmanned Aerial Vehicles ◽  
Geophysical Methods ◽  
Work Productivity ◽  
Field Work ◽  
Magnetic Survey ◽  
Aeromagnetic Survey ◽  
Aerial Vehicles ◽  
Eastern Transbaikalia ◽  
Actual Material ◽  
Ground Magnetic

The use of unmanned aerial vehicles (UAVs) in geophysical work is becoming a very popular area in the field of modern geological exploration. The advantage of unmanned systems is the optimal ratio of the quality of research results with a significant increase in work productivity and a decrease in cost. In this regard, the improvement of field techniques and the processing of UAV materials is of particular interest for exploration. On the subject, there are a number of unresolved issues that have been revealed to some extent as a result of the author’s comparison of ground-based magnetic exploration and aeromagnetic survey data. The purpose of the study was to assess the possibility of a full-fledged replacement of ground magnetic exploration work for aeromagnetic survey using unmanned aerial vehicles. The comparison of different types of magnetic survey is relevant, since on the basis of the actual material, the possibility of using an alternative more productive method – aeromagnetic survey using modern UAVs – instead of traditional expensive ground-based magnetic exploration works is analyzed. To compare the results of the studies, actual material obtained from field work on an area of 13,4 km2 was used. Based on the databases, maps of anomalous magnetic field and graphs on several geophysical profiles are built. Results of magnetic survey in air and ground versions are analyzed; correlation relationships between data of ground pedestrian magnetic survey and aeromagnetic system on An-3 and UAV aircraft are established. Based on the results of the study, correlation and determination coefficients were obtained, which indicate that geophysical methods on UAVs adequately occupy their place between classical aerogeophysics and ground-based pedestrian survey. Moreover, aeromagnetic survey using UAVs is able to replace pedestrian magnetic exploration during work at the same heights. Based on the results of the study, methodological recommendations for the production of aeromagnetic survey on UAVs were compiled

scholarly journals The Magnetometry—A Primary Tool in the Prospection of Underground Water

2020 ◽  
Author(s):  
Héctor López Loera
Keyword(s):  
High Probability ◽  
Underground Water ◽  
Arid Zones ◽  
Magnetic Survey ◽  
Aeromagnetic Survey ◽  
Electrical Sounding ◽  
Electrical Methods ◽  
Ground Magnetic ◽  
The One ◽  
Semi Arid

One of the most important problems in arid and semi-arid zones in the Mexican Mesa Central is the one related to the exploration and exploitation of groundwater. It is found at depths over 200 m, and movement is primarily through fractures. This work presents a geophysical methodology, which shows the potential of combining natural and induced methods to locate confined aquifers in fault zones. The study begins by interpreting the aeromagnetic survey, mainly by searching alignments associated with low magnetic anomalies, which are correlated with faults zones, and/or fractures and/or geologic contacts where ferromagnetic minerals have undergone oxidation due to their association with recharged zones. These aeromagnetic alignments are confirmed on land by a ground magnetic survey. Based on these interpretations, electrical methods include sections and vertical electrical sounding are used to verify if the zones are correlated to the underground moisture. If both permeability and moisture are met together, then they considered as zones with a high probability of locating ground water in the Mexican Mesa Central.

The New Swedish Cyprus Expedition 2014. Excavations at Hala Sultan Tekke. Preliminary results

2015 ◽  
Vol 8 ◽  
pp. 27-79 ◽  
Author(s):  
Peter M. Fischer ◽  
Teresa Bürge ◽  
I. Trinks ◽  
L. Mazzotta ◽  
Learke Recht ◽  
...  
Keyword(s):  
Geophysical Methods ◽  
Field Work ◽  
Magnetic Survey ◽  
The West ◽  
Preliminary Results ◽  
Area 6 ◽  
New City ◽  
Human Burials ◽  
The City

The initial aim of the project—the search for the oldest city of Hala Sultan Tekke—continued in 2014. Geophysical methods were used, which led to the discovery of new city quarters, and a broadening of the research objectives, to include revealing the total extent of the city. The GPR survey indicated a huge stone compound of at least 50 m × 40 m to the west of a probable street. Excavations continued in Area 6 West, where in 2013 a domestic and industrial compound was excavated as part of a hitherto unknown city quarter. The 2014 field work exposed stone-built structures and rich find contexts with locally made and imported pottery, numerous tools and several items of gold and silver jewellery. The violent destruction of the most recent layer of occupation, Stratum 1, which had been observed during previous seasons, was once again confirmed. Another georadar and magnetic survey west of the mosque of Hala Sultan Tekke indicated numerous circular anomalies. Five of these were excavated and turned out to be four wells and an offering pit. One of the wells was reused for human burials. Another well contained the skeleton of an equid, a complete bull figurine and a cylinder seal of haematite.

Unmanned Aerial Vehicle – Efficient mapping tool available for recent research in polar regions

2015 ◽  
Vol 5 (2) ◽  
pp. 210-221 ◽  
Author(s):  
Radim Stuchlík ◽  
Zdeněk Stachoň ◽  
Kamil Láska ◽  
Petr Kubíček
Keyword(s):  
Unmanned Aerial Vehicles ◽  
Field Work ◽  
Polar Regions ◽  
Svalbard Archipelago ◽  
Mapping Tool ◽  
Aerial Vehicles ◽  
Aerial Vehicle ◽  
Harsh Climate ◽  
Near Future

Unmanned Aerial Vehicles (UAV) have technical capabilities to extended usage in various fields ofscience. The existing UAVs are to be relatively easily accessible in the near future. It is possible to equip them with different sensors but there are still some usage limitations. This paper focuses ondemonstrating UAVs usage for research in polar regions. The research in polar regions is very specific and, due to harsh climate, limits the field work with UAVs. The options and limitations are presented in a case study performed in the Nordenskiöldbreen area, Svalbard Archipelago. In the end some derived products suitable for further analysis are presented.

scholarly journals Geophysical investigations at the Inland Ice margin of the Pâkitsoq basin, central West Greenland

1986 ◽  
Vol 130 ◽  
pp. 114-121
Author(s):  
L Thorning ◽  
H.H Thomsen ◽  
E Hansen
Keyword(s):  
Field Work ◽  
Magnetic Survey ◽  
West Greenland ◽  
Considerable Success ◽  
Marginal Areas ◽  
Geophysical Investigations ◽  
Ground Magnetic ◽  
Inland Ice

In recent years much effort has been directed towards investigation of the margin of the Inland Ice in connection with possible development of hydropower. The thickness of the ice and thus the subglacial relief has been difficult to determine. Electromagnetic reflection (EMR) techniques have been used over large parts of the Inland Ice with considerable success, but have so far not produced good results in the marginal areas of the Inland Ice. This note reports the successful application of EMR techniques to an area of the Inland Ice adjacent to the Piikitsoq basin near Jakobshavn, central West Greenland, together with a ground magnetic survey over a smaller part of the area. The field areas are shown in fig 1. The field work was carried out by LT and ER during a five week period in July-August 1985.

Interpretation of the magnetic anomaly over the Omaha Oil Field, Gallatin County, Illinois

Geophysics ◽  
1994 ◽  
Vol 59 (7) ◽  
pp. 1092-1099 ◽  
Author(s):  
Mark A. Sparlin ◽  
Richard D. Lewis
Keyword(s):  
Magnetic Anomaly ◽  
Primary Source ◽  
Oil Field ◽  
Magnetic Feature ◽  
Magnetic Survey ◽  
Aeromagnetic Survey ◽  
Data Set ◽  
Interesting Possibility ◽  
Ground Magnetic ◽  
Structural Closure

A 40 nanoTesla (nT) magnetic anomaly identified in an aeromagnetic survey over southern Illinois contours as a localized magnetic high on the west flank of a regional magnetic low. This magnetic anomaly is generally coincident with the Omaha Oil Field in northwest Gallatin County, Illinois. It was initially assumed that cultural sources of steel associated with this oil field were the primary source of the magnetic feature; however, similar oil fields overflown by the survey do not exhibit magnetic anomalies in the data set. The Luther Rister et ux ♯1 well, drilled near the apex of the Omaha structural dome, encountered two zones of ultramafic intrusive rock containing 9.0 percent by volume magnetite. These intrusives were identified to be alnöites which are a class of mantle‐derived ultramafic rock that can be associated with the incipient stages of crustal rifting. A ground magnetic survey verified the presence of the anomaly, and provided detailed data for 3-D modeling of the source. Petrophysical evaluations, magnetic susceptibility measurements and thin section modal analysis were made on drill cuttings from the ultramafic intrusives encountered in the Luther Rister ♯1 well. These measurements were made to constrain the 3-D magnetic modeling by the petrophysical characteristics of the source. After removal of the regional magnetic field, the resulting 140 nT residual magnetic anomaly was successfully modeled using two ultramafic sills with an igneous feeder plug. The two igneous sills adequately account for the structural closure exhibited in the Omaha Oil Field and raise the interesting possibility of other hydrocarbon trapping structures generated by intrusives emplaced into the sedimentary section.

scholarly journals The Use of Unmanned Aerial Vehicles (UAVs) for Estimating Soil Volumes Retained by Check Dams after Wildfires in Mediterranean Forests

Soil Systems ◽  
2021 ◽  
Vol 5 (1) ◽  
pp. 9
Author(s):  
Bruno Timóteo Rodrigues ◽  
Demetrio Antonio Zema ◽  
Javier González-Romero ◽  
Mikael Timóteo Rodrigues ◽  
Sérgio Campos ◽  
...  
Keyword(s):  
Unmanned Aerial Vehicles ◽  
Field Work ◽  
Coefficient Of Determination ◽  
Mediterranean Forests ◽  
Sediment Volume ◽  
Aerial Vehicles ◽  
Check Dams ◽  
La Mancha ◽  
Wedge Volume ◽  
Volume Estimates

Check dams act as soil collectors during floods, thus retaining a large amount of sediments. The estimation of the soil volumes stored behind a check dam is a key activity for a proper design of these control works and for evaluation of soil delivery after restoration measures at watershed level. Several topographic techniques have been proposed for this activity, but the sediment wedge mapping tools are complex and time consuming. Conversely, the use of unmanned aerial vehicles (UAVs) has been proposed to support aerophotogrammetric techniques for several survey activities with promising results. However, surveys by UAVs have never applied to calculate the size of the sediment wedge behind check dams that are built in fire-affected watersheds, where soil loss and sediment transport may be high after a wildfire. To fill this gap, this study evaluates the efficiency and efficacy of aerophotogrammetric surveys using UAVs to estimate the volume of the sediments stored behind ten check dams, built as post-fire channel treatment in a forest watershed of Castilla La Mancha (Central Eastern Spain). The results of the aerophotogrammetric technique were compared to traditional topographic surveys using a total station and GNSS/RTK, assumed as reference. The estimation of sediment wedge volume provided by UAVs was more accurate (mean RMSE of 0.432), extensive (density of mapped points of 328 m−2) and quick (two days of fieldwork) compared to surveys using the topographic method (RMSE < 0.04 m, six days of field work and density of mapped points of 0.194 m−2) by the topographic method. The differences in the sediment volume estimated by the two methods were not significant, but the UAV method was more accurate for the larger check dams. Moreover, a significant correlation was observed between the volume estimates provided by the two methods, shown by a coefficient of determination close to 0.98. Overall, these results propose a larger use of the aerial surveys for mapping activities in channels regulated by check dams, such as those built for restoration of fire-affected forest watersheds.

Development of thickened semi-synthetic engine oil M-5z / 20 AERO for four-stroke gasoline engines aircraft piston of unmanned aerial vehicles (UAVs)

2020 ◽  
Vol 06 ◽  
pp. 44-47
Author(s):  
A.A. Moykin ◽  
◽  
A.S. Medzhibovsky ◽  
S.A. Kriushin ◽  
M.V. Seleznev ◽  
...  
Keyword(s):  
Unmanned Aerial Vehicles ◽  
Engine Oil ◽  
Motor Oil ◽  
Gasoline Engines ◽  
State Research Institute ◽  
Technical Requirements ◽  
Aerial Vehicles ◽  
State Research ◽  
Industrial Batch ◽  
The Russian Federation

Nowadays, the creation of remotely-piloted aerial vehicles for various purposes is regarded as one of the most relevant and promising trends of aircraft development. FAU "25 State Research Institute of Chemmotology of the Ministry of Defense of the Russian Federation" have studied the operation features of aircraft piston engines and developed technical requirements for motor oil for piston four-stroke UAV engines, as well as a new engine oil M-5z/20 AERO in cooperation with NPP KVALITET, LLC. Based on the complex of qualification tests, the stated operational properties of the experimental-industrial batch of M-5z/20 AERO oil are generally confirmed.

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