1 Why the test is used: Between 75% and 90% of people with lupus have a positive anti-dsDNA test. 2  Also, the test is very specific for lupus. 3  Therefore, a positive test can be useful in confirming a diagnosis. 4  For many people, the titer, or level, of the antibodies rises as the disease becomes more active.
The zone below ground where the pore spaces are filled with ground water is called the saturated zone. Above the saturated zone, where the pore spaces are not filled with ground water, is the unsaturated zone. The water table marks the boundary between the saturated and unsaturated zone. The water table intersects Earth's surface at rivers and at lakes.
Ground water is water that fills pores and fractures in the ground, much as milk. fills the voids within bits of granola in a breakfast bowl(Figu re 2). The top of ground. water is called thewater table . Between the water table and the land surface is the. unsaturated zoneor vadose zone.In the unsaturated zone, moisture is moving down-. ward to the water table to recharge the ground water. The water table can be very. close to the su rface (within a few feet), or very deep (up to several hund ed feet).