Electrical Rcaistiviting Method

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 Electrical Rcaistiviting Method

Its first use was for electrical resistance method in 1964, the first geophysical methods used in detecting buried in the ground effects.
And geophysical methods (Geophysical Methods) that can assist archeology using theories of physics to detect geological structures of the Earth’s crust and learn then what in this land of treasures, whether or not an archaeological artifact (2).

2 1 area of use and applications:
Archaeological research methods adopted generally to scientific expertise in this area where most archaeological hills know the result recorded in the historical books or by comparison with the surrounding land around the Highlands, who take archaeological (broken pottery, glass …) covering most of the hills. There are many sites that are found as a result of human actions, such as agriculture or dig trenches and others.
The Geophysics is one vast science covering the study of physical properties of Earth, which reveals the subterranean, interpretation of geophysical measurements in many areas, including metal detectors, raw materials, and groundwater, oil,
underground structures, caves, as well as measuring the intensity of earthquakes and others. It may not be surprising if we find this science uses day after day in new areas. We find geoscientist enters in the detection of effects.
The numerous geophysical methods, methods used to detect the effects of magnetism and electrical resistance method and electromagnetic radiation. Either the methods most used in the investigation of effects which were used to detect many impacts worldwide:
1 how magnetism Magnetic Method
2 way Electrical Rcaistiviting electrical resistance Method
An advantage of using these methods is fast and inexpensive, so they appear in very spacious sites. Also, these methods are not spoken any damages in construction and archaeological use and quality can be set throughout its buildings and archeological.
Thus, there are many archaeological sites lacking Geophysical to develop a clear picture of concentration and monuments. There are also many archaeological sites perishable for the reasons mentioned above, in this case a geophysical site survey, identification and preservation of monuments underground without drilling to be ready full exploration and maintenance (3).
3 1 operative technique:
The foundation built using geophysical methods is the existence of differences in physical characteristics between the archaeological body and surrounding materials. This difference will cause abnormalities or deviations events (Anomaly) in field readings help set monuments. Value gay positive (Positive Anomaly), in the event that the archaeological material of properties1 high, more from the surrounding material. On the contrary in case of archaeological material properties1 less material buried there be gays negative (Neyatine Anomaly).
Also, the electrical resistance method, used in investigating groundwater, minerals and know the layers beneath the Earth’s surface and is the first geophysical method applied in the detection of effects.
This method relies on the existence of differences in electrical resistance (Resistivity Contrast), between the archaeological object “body designed to look”, and the surrounding material, it is known that rocks vary in susceptibility of electrical conductivity, this difference depends on several reasons, including gaps, plus quality metal components of these rocks. Etc. Generally be igneous rocks (Igneous), more reluctant to electricity from sedimentary rocks (Sedimentary Rocks), to fit the gaps, and soils (Soil), terracotta (Clay), amenable to high electrical.
For the purpose of conducting field measurements to demonstrate on Earth four electrodes (Electrods), two of them used to pass electrical current and designated electrical poles (Current Electrods), the other the chiefs used to measure potential difference and labeled with voltage electrodes (Potential Electrods).
During the screening process on the Poles are installed in two ways:
Method 1: called Wii seen (Wenner Configuration), where poles are distributed as shown in figure (a) and take the voltage electrodes electrodes are equal distances between the four poles. And choose the distance between electrodes based on depth effects to be detected and the form of abnormality as shown in figure (a).
Either method 2: called a bipolar (Dipole Dipole), and in this way prove electrodes effort on both ends of the electrodes, and the abnormality as shown in figure (b). Each of these methods, their advantages and disadvantages.
After installing electrodes are measuring the voltage difference when you pass voltage through a special measuring device called a measurement of electrical resistance (Resistiviting-meter), where electrical resistance is then calculated by the following equation:
Electrical resistance (OHM) current (AMPS) voltage (volts) x fixed.
“The value of the constant depends on the distance between electrodes”
If there are ground harmonized classes, the movement of electricity be regular. In the case of a reluctant body electric differ from the surrounding layers change occurs in a path, and then composed oddities. By studying this anomaly by co-Chairman specialists can identify the pathogenic properties of this change and their locations.