Below the water table, in the phreatic zone, permeable units that yield groundwater are called aquifers. The ability of the aquifer to store groundwater is dependent on the primary and secondary porosity and permeability of the rock or soil.onsequently, the water table is lower during the summer. This disparity between the level of the winter and summer water table is known as the zone of intermittent saturation, wherein the water table will fluctuate in response to climatic conditions.
The CDC says about 310,000 American kids (1 to 5 years old) have blood-lead levels over 10 micrograms/dL. A U.S. child's main risk of lead poisoning comes from the lead-based house paints in near-universal use before 1950. The paints were banned for housing use in 1978.
Nutrition and Lead Poisoning. Nutrition is only a temporary way of protecting young children from lead poisoning. The best way to prevent lead poisoning is to have the child's home inspected and deleaded. Give your children foods high in calcium and iron and low in fat to help prevent lead poisoning. Lead poisoning can damage the brain, kidneys, and nervous systems of young children. Even low levels of lead in a child's body can cause learning and behavioral problems.