Abstract
Storm solute behavior of a small forested catchment with steep hillslopes and abundant rainfall in summer was investigated in hilly country of southern Kyushu. Inorganic ion concentrations for twelve storm events were analyzed for a year. The stream water chemistry of this catchment was characterized by: 1) independent increase or decrease pattern of storm solute concentrations on season, rainfall, discharge before precipitation and antecedent precipitation index; 2) remarkable nitrate concentration rise at flooding in summer; 3) marked flushing effects. These characteristics are probably due to predominant soil water during the events and abundant rainfall and higher temperature in summer.
