The following are examples of hypothetical regions that need to be surveyed. Using the descriptions of the projects in the follo
wing three regions decide which survey techniques you would use and why. Answers should be in short essay form.Region A: is situated in a Caribbean landscape that has been covered by a relatively uniform 145 cm (appx 58in) ash flow from a nearby volcano. This has resulted in a flat ground-surface with no visible underlying features. There is no significant vegetation growth in this area that might affect your survey. You are interested in locating the stone foundation of a Colonial plantation house that is known from historical documentation to lie within the survey region.Historical documentation indicates that a huge battle was fought between Celts and Roman soldiers somewhere within Region B in southcentral England ca. 50 BC. You are interested in finding the extent of the battle and determining how it progressed. No earthworks or other physical defenses were used, so you will have to rely upon artifacts from the soldiers themselves. The area is currently covered by woods and small fields.Region C is an area in rural South Carolina that is to be made into a retirement community. It is currently mostly farmland crossed by small belts of trees. You have been able to find no pertinent historical information about this particular piece of land, but you know that the region has been inhabited for thousands of years by Native Americans and for hundreds by European and African immigrants.
A simple ground based field survey with the investigators walking around the survey area might help locate the Colonial plantation house. An extension of this, is to manually dig test holes either randomly, or in a grid to help locate the house.
ii)<u> Radar survey:</u>
Using ground penetrating radars, a subsurface image of the region can be prepared. The lack of vegetation will help generate a clear image. This subsurface can help possibly pinpoint the exact location of the plantation house. Radar uses EM waves to determine the shape of objects based on the reflectivity of the object being imaged.
iii)<u>Resistivity:</u>
The resistivity of the ash bed will be different from the resistivity of the material used to build the house, and this difference in resistivity can be used in a resistivity survey to locate the house.
