Evaluation of the Sea-salt Loads to Land Region by Rainfalls at the Typhoons

Abstract

Water chemistry of rainfalls, especially the sea-salt loads at the typhoons was studied in Kochi Pref. in 1997-2005. Occasionally rainfalls at typhoons contained large amount of sea-salt, but the contents of each rainfall and annual loads fluctuated sharply. The sea-salt loads decreased in proportion to the distance from the coast. There was no influence in the water chemistry in small watersheds even when the rainfalls had high concentration of sea-salt. It was clarified that the amount of sea-salt loads depended on the track of typhoons and the wind velocity.