A Ghyben-Herzberg lens occurs when these objects are on islands, and an equation named for those two men is used to calculate the level of(*) intrusion into one of these objects.
Slug testing of these objects is very quick and inexpensive, but only tests a small area of one and may be best used in poorly transmissive conditions. The Hantush-Thomas method can often be used to calculate characteristics of these objects when their values of Kh and Kv differ; that difference defines the anisotropic type which is often found in the fractured rock variety of these objects. A Ghyben-Herzberg lens occurs when these objects are on islands, and an equation named for those two men is used to calculate the level of(*) intrusion into one of these objects. Perched ones are usually small, while confined ones often border a clay or unfractured granite layer and phreatic ones have the water table as their upper surface. The saturated type occurs when their hydraulic head is greater than atmospheric pressure. For 10 points, name these layers of saturated rock through which water can easily move.
Slug testing of these objects is very quick and inexpensive, but only tests a small area of one and may be best used in poorly transmissive conditions.
aquifers