What exactly is a geophysical survey? While there are a lot of technical terms that can be used to answer this question, a very simple way to describe this type of survey is to think about using a metal detector to look for a coin. When a person is walking on the beach with a metal detector, the goal of the survey is to find a claim. So the coin is the target of the survey. The metal detector is the geophysical tool that is used to conduct the survey.
Geophysical surveys are used to search for, find, or detect something. It is performed using geophysical tools. Geophysical survey allow surveyors to search for something that might be hidden underground or underwater. They can also be used to identify objects that are hidden inside or behind of a wall. In most applications, geophysical surveys are less expensive than doing a physical excavation. Another benefit of geophysical surveys is that they are nondestructive, allowing a person to see what is underneath the ground or inside a wall without actually needing to destroy the location.
Geophysical surveys are fast, and they are convenient. These surveys can be performed in the air, performed on the ground, and performed on the water’s surface. In some rare instances, geophysical surveys require a borehole to be drilled in the ground before the survey can be performed.
Geophysical surveys are used when companies explore for oil, gas, and minerals. Another term for this type of survey is a seismic survey since this describes the primary technique that is used in geophysical surveys. At times, other methods such as the gravity method, electromagnetic, direct-current electrical, and resistivity can be used.
In addition to being used in the gas and oil industry, geophysical surveys are an important tool for environmental research. They can show researchers the effect that building, pollution, and other changes in the landscape are having to water supplies and mineral deposits underneath the ground. Archaeologists make good use of this technology when they are excavating a site. They will use this technology to examine an excavation site to see what is underneath an area before they actually begin to dig it up. This can save them time, labor, and expensive resources.
Every year, the technology used in geophysical surveys improves. New technologies like ground penetrating radar are allowing surveyors to see what is happening underground with even greater clarity.