Chemical and physical characteristics of precipitation at selected sites in Florida

摘要: Infrequent sampling of precipitation in Florida has been conducted by the U.S. Geological Survey since 1965. A summary historical data from 24 sites throughout indicate that principal ionic composition atmospheric samples is calcium sodium and bicarbonate chloride with an average specific conductance 32 micromhos per centimeter at 25°C. Historically, much focused on primary nutrients selected trace elements. Historical nitrogen phosphorus concentrations averaged 1.1 0.1 milligrams liter, respectively. The limited metal motor-vehicle activity may have a significant impact local quality. Lead, for example, was measured as 2,400 micrograms liter collected highly populated, commercial area south Florida. Statistical testing indicated most major inorganic constituents, nutrients, metals were significantly different among sites. pH range about 5.0 to 7.0, but only analyzed such timely manner represent conditions during active rainfall. critical review suggested while they reflect quality likely do not define baseline regional perspective. application these regarding extrapolation due variations techniques, methods sample preservation, intervals, sizes, periods record.